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Wu J, Xiong L, Huang X, Li C, Li F, Wong JWC. Silver sulfide nanoparticles eliminate the stimulative effects of earthworms on nutrient uptake by soybeans in high organic matter soils. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 947:174433. [PMID: 38960153 DOI: 10.1016/j.scitotenv.2024.174433] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/29/2023] [Revised: 06/03/2024] [Accepted: 06/30/2024] [Indexed: 07/05/2024]
Abstract
A significant knowledge gap exists regarding the impact of soil organic matter on the bioavailability of Ag2S-NPs (environmentally relevant forms of Ag-NPs) in soil-earthworm-plant systems. This study used two soils with varying organic matter content, both with and without earthworms, to investigate the bioavailability of Ag2S-NPs. The findings revealed an 80 % increase in Ag bioaccessibility to soybeans in soils with high organic matter content compared to soils with low organic matter. Additionally, the presence of earthworms significantly increased Cl concentrations from 24.3-62.2 mg L-1 to 80.1-147.2 mg L-1, triggering the elevated bioavailability of Ag. Interestingly, Ag2S-NPs eliminated the stimulative effects of earthworms on plant nutrient uptake. In the presence of earthworms, the high organic matter soil amended with Ag2S-NPs exhibited lower concentrations of essential elements (Ca, Cu, Fe, K, and P) in plant tissues compared to soils without earthworms. Our study presents evidence of the transformation of Ag2S-NPs into Ag-NPs across various soil solutions, resulting in the formation of Ag nanoparticle complexes. Particularly noteworthy is the significant reduction in particle sizes in soils incubated with earthworms and high organic matter content, from 85.0 nm to 40.2 nm. Notably, in the rhizosphere soil, a decrease in the relative abundance of nutrient cycling-related phyla was observed, with reductions of 18.5 % for Proteobacteria and 30.0 % for Actinobacteriota. These findings offer valuable insights into the biological and biochemical consequences of Ag2S-NP exposure on earthworm-mediated plant nutrient acquisition.
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Affiliation(s)
- Jingtao Wu
- Research Center for Eco-Environmental Engineering, Dongguan University of Technology, Dongguan 523808, PR China; Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China; The University of Queensland, School of Agriculture and Food Sciences, St Lucia, Queensland 4072, Australia
| | - Lei Xiong
- The University of Queensland, School of Agriculture and Food Sciences, St Lucia, Queensland 4072, Australia; Smart Water Affairs Research Center, Shenzhen University, Shenzhen 518000, China
| | - Xingyun Huang
- Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China
| | - Cui Li
- The University of Queensland, School of Agriculture and Food Sciences, St Lucia, Queensland 4072, Australia; Northwestern Polytechnical University, Research Centre for Ecology and Environmental Sciences, Xi'an 710072, China
| | - Feng Li
- Research Center for Eco-Environmental Engineering, Dongguan University of Technology, Dongguan 523808, PR China; College of Chemistry & Biology and Environmental Engineering, Xiangnan University, Chenzhou 423043, Hunan, PR China; Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China.
| | - Jonathan W C Wong
- Research Center for Eco-Environmental Engineering, Dongguan University of Technology, Dongguan 523808, PR China
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Xiang Z, Xu Y, Dong W, Zhao Y, Chen X. Effects of sliver nanoparticles on nitrogen removal by the heterotrophic nitrification-aerobic denitrification bacteria Zobellella sp. B307 and their toxicity mechanisms. MARINE POLLUTION BULLETIN 2024; 203:116381. [PMID: 38692001 DOI: 10.1016/j.marpolbul.2024.116381] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/02/2024] [Revised: 04/12/2024] [Accepted: 04/13/2024] [Indexed: 05/03/2024]
Abstract
Due to the widespread use of sliver nanoparticles (AgNPs), a large amount of AgNPs has inevitably been released into the environment, and there is growing concern about the toxicity of AgNPs to nitrogen-functional bacteria. In addition to traditional anaerobic denitrifying bacteria, heterotrophic nitrification-aerobic denitrification (HNAD) bacteria are also important participants in the nitrogen cycle. However, the mechanisms by which AgNPs influence HNAD bacteria have yet to be explicitly demonstrated. In this study, the inhibitory effects of different concentrations of AgNPs on a HNAD bacteria Zobellella sp. B307 were investigated, and the underlying mechanism was explored by analyzing the antioxidant system and the activities of key denitrifying enzymes. Results showed that AgNPs could inhibit the growth and the HNAD ability of Zobellella sp. B307. AgNPs could accumulate on the surface of bacterial cells and significantly destroyed the cell membrane integrity. Further studies demonstrated that the presence of high concentration of AgNPs could result in the overproduction of reactive oxygen species (ROS) and related oxidative stress in the cells. Furthermore, the catalytic activities of key denitrifying enzymes (nitrate reductase (NAR), nitrite reductase (NIR), and nitrous oxide reductase (N2OR)) were significantly suppressed under exposure to a high concentration of AgNPs (20 mg·L-1), which might be responsible for the inhibited nitrogen removal performance of strain B307. This work could improve our understanding of the inhibitory effect and underlying mechanism of AgNPs on HNAD bacteria.
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Affiliation(s)
- Zhuangzhuang Xiang
- College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, China
| | - Yibo Xu
- College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, China
| | - Wenlong Dong
- Shandong Marine Forecast and Hazard Mitigation Service, Qingdao 266100, China
| | - Yangguo Zhao
- College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, China; Key Laboratory of Marine Environment and Ecology (Ocean University of China), Ministry of Education, Qingdao 266100, China
| | - Xi Chen
- College of Marine Life Science, Ocean University of China, Qingdao 266003, China.
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Sun P, Bai J, Lian J, Tan Y, Chen X. Single and Combined Effects of Phenanthrene and Silver Nanoparticles on Denitrification Processes in Coastal Marine Sediments. Microorganisms 2024; 12:745. [PMID: 38674689 PMCID: PMC11051833 DOI: 10.3390/microorganisms12040745] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2024] [Revised: 03/29/2024] [Accepted: 04/02/2024] [Indexed: 04/28/2024] Open
Abstract
The increasing production and utilization of polycyclic aromatic hydrocarbons (PAHs) and commercial silver nanoparticles (AgNPs) have raised concerns about their potential environmental release, with coastal sediments as a substantial sink. To better understanding the effects of these contaminants on denitrification processes in coastal marine sediments, a short-term exposure simulation experiment was conducted. We investigated the effects of single and combined contamination of phenanthrene (Phe) and AgNPs on denitrification processes in a coastal marine sediment. Results showed that all contaminated treatment groups had different degrees of inhibitory effect on denitrification activity, denitrifying enzyme activity, total bacteria count and denitrifying genes. The inhibitory effect sequence of each treatment group was combined treatment > AgNPs treatment > Phe treatment. Moreover, the inhibitory effects of denitrifying genes were much larger than that of total bacteria count, indicating that the pollutants had specific toxic effects on denitrifying bacteria. The sequence of sensitivity of three reduction process to pollutants was N2O > NO2- > NO3-. All contaminated treatment groups could increase NO3-, NO2- and N2O accumulation. Furthermore, according to the linear relationship between functional gene or reductase and denitrification process, we also found that the abundance of denitrifying genes could better predict the influence of Phe and AgNPs on sediment denitrification than the denitrifying bacterial diversity. In addition, at the genus level, the community structure of nirS- and nosZ-type denitrifying bacteria changed dramatically, while changes at the phylum level were comparatively less pronounced. Single and combined contamination of Phe and AgNPs could reduce the dominance of Pseudomonas, which may lead to a potential slow-down in the degradation of Phe and inhibition of denitrification, especially the combined contamination. Overall, our study revealed that combined contamination of Phe and AgNPs could lead to an increase in NO3-, NO2- and N2O accumulation in coastal sediment, which poses a risk of eutrophication in coastal areas, exacerbates the greenhouse effect and has adverse effects on global climate change.
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Affiliation(s)
- Pengfei Sun
- Key Laboratory of Tropical Marine Ecosystem and Bioresource, Fourth Institute of Oceanography, Ministry of Natural Resources, Beihai 536000, China; (P.S.); (J.L.); (Y.T.)
- College of Marine Life Sciences, Ocean University of China, Qingdao 266100, China
- Guangxi Beibu Gulf Key Laboratory of Marine Resources, Environment and Sustainable Development, Fourth Institute of Oceanography, Ministry of Natural Resources, Beihai 536000, China
| | - Jie Bai
- College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, China;
| | - Jie Lian
- Key Laboratory of Tropical Marine Ecosystem and Bioresource, Fourth Institute of Oceanography, Ministry of Natural Resources, Beihai 536000, China; (P.S.); (J.L.); (Y.T.)
- Guangxi Beibu Gulf Key Laboratory of Marine Resources, Environment and Sustainable Development, Fourth Institute of Oceanography, Ministry of Natural Resources, Beihai 536000, China
| | - Yongyu Tan
- Key Laboratory of Tropical Marine Ecosystem and Bioresource, Fourth Institute of Oceanography, Ministry of Natural Resources, Beihai 536000, China; (P.S.); (J.L.); (Y.T.)
- Guangxi Beibu Gulf Key Laboratory of Marine Resources, Environment and Sustainable Development, Fourth Institute of Oceanography, Ministry of Natural Resources, Beihai 536000, China
| | - Xi Chen
- College of Marine Life Sciences, Ocean University of China, Qingdao 266100, China
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Silva I, Alves M, Malheiro C, Silva ARR, Loureiro S, Henriques I, González-Alcaraz MN. Structural and Functional Shifts in the Microbial Community of a Heavy Metal-Contaminated Soil Exposed to Short-Term Changes in Air Temperature, Soil Moisture and UV Radiation. Genes (Basel) 2024; 15:107. [PMID: 38254996 PMCID: PMC10815596 DOI: 10.3390/genes15010107] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2023] [Revised: 01/11/2024] [Accepted: 01/14/2024] [Indexed: 01/24/2024] Open
Abstract
The interplay between metal contamination and climate change may exacerbate the negative impact on the soil microbiome and, consequently, on soil health and ecosystem services. We assessed the response of the microbial community of a heavy metal-contaminated soil when exposed to short-term (48 h) variations in air temperature, soil humidity or ultraviolet (UV) radiation in the absence and presence of Enchytraeus crypticus (soil invertebrate). Each of the climate scenarios simulated significantly altered at least one of the microbial parameters measured. Irrespective of the presence or absence of invertebrates, the effects were particularly marked upon exposure to increased air temperature and alterations in soil moisture levels (drought and flood scenarios). The observed effects can be partly explained by significant alterations in soil properties such as pH, dissolved organic carbon, and water-extractable heavy metals, which were observed for all scenarios in comparison to standard conditions. The occurrence of invertebrates mitigated some of the impacts observed on the soil microbial community, particularly in bacterial abundance, richness, diversity, and metabolic activity. Our findings emphasize the importance of considering the interplay between climate change, anthropogenic pressures, and soil biotic components to assess the impact of climate change on terrestrial ecosystems and to develop and implement effective management strategies.
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Affiliation(s)
- Isabel Silva
- CEF (Center for Functional Ecology), Associate Laboratory TERRA, Department of Life Sciences, Faculty of Sciences and Technology, University of Coimbra, 3000-456 Coimbra, Portugal;
- CESAM (Centre for Marine and Environmental Studies), Department of Biology, University of Aveiro, 3810-193 Aveiro, Portugal; (C.M.); (A.R.R.S.); (S.L.)
| | - Marta Alves
- CBQF (Center for Biotechnology and Fine Chemistry), School of Biotechnology, Portuguese Catholic University, 4169-005 Porto, Portugal;
| | - Catarina Malheiro
- CESAM (Centre for Marine and Environmental Studies), Department of Biology, University of Aveiro, 3810-193 Aveiro, Portugal; (C.M.); (A.R.R.S.); (S.L.)
| | - Ana Rita R. Silva
- CESAM (Centre for Marine and Environmental Studies), Department of Biology, University of Aveiro, 3810-193 Aveiro, Portugal; (C.M.); (A.R.R.S.); (S.L.)
| | - Susana Loureiro
- CESAM (Centre for Marine and Environmental Studies), Department of Biology, University of Aveiro, 3810-193 Aveiro, Portugal; (C.M.); (A.R.R.S.); (S.L.)
| | - Isabel Henriques
- CEF (Center for Functional Ecology), Associate Laboratory TERRA, Department of Life Sciences, Faculty of Sciences and Technology, University of Coimbra, 3000-456 Coimbra, Portugal;
| | - M. Nazaret González-Alcaraz
- CESAM (Centre for Marine and Environmental Studies), Department of Biology, University of Aveiro, 3810-193 Aveiro, Portugal; (C.M.); (A.R.R.S.); (S.L.)
- Department of Agricultural Engineering of the E.T.S.I.A., Technical University of Cartagena, 30203 Cartagena, Spain
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Dong J, Yang B, Wang H, Cao X, He F, Wang L. Reveal molecular mechanism on the effects of silver nanoparticles on nitrogen transformation and related functional microorganisms in an agricultural soil. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 904:166765. [PMID: 37660816 DOI: 10.1016/j.scitotenv.2023.166765] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/03/2023] [Revised: 08/29/2023] [Accepted: 08/31/2023] [Indexed: 09/05/2023]
Abstract
Silver nanoparticles (AgNPs) are widely present in aquatic and soil environment, raising significant concerns about their impacts on creatures in ecosystem. While the toxicity of AgNPs on microorganisms has been reported, their effects on biogeochemical processes and specific functional microorganisms remain relatively unexplored. In this study, a 28-day microcosmic experiment was conducted to investigate the dose-dependent effects of AgNPs (10 mg and 100 mg Ag kg-1 soil) on nitrogen transformation and functional microorganisms in agricultural soils. The molecular mechanisms were uncovered by examining change in functional microorganisms and metabolic pathways. To enable comparison, the toxicity of positive control with an equivalent Ag+ dose from CH3COOAg was also included. The results indicated that both AgNPs and CH3COOAg enhanced nitrogen fixation and nitrification, corresponding to increased relative abundances of associated functional genes. However, they inhibited denitrification via downregulating nirS, nirK, and nosZ genes as well as reducing nitrate and nitrite reductase activities. In contrast to high dose of AgNPs, low levels increased bacterial diversity. AgNPs and CH3COOAg altered the activities of associated metabolic pathways, resulting in the enrichment of specific taxa that demonstrated tolerance to Ag. At genus level, AgNPs increased the relative abundances of nitrogen-fixing Microvirga and Bacillus by 0.02 %-629.39 % and 14.44 %-30.10 %, respectively, compared with control group (CK). The abundances of denitrifying bacteria, such as Rhodoplanes, Pseudomonas, and Micromonospora, decreased by 19.03 % to 32.55 %, 24.73 % to 50.05 %, and 15.66 % to 76.06 %, respectively, compared to CK. CH3COOAg reduced bacterial network complexity, diminished the symbiosis mode compared to AgNPs. The prediction of genes involved in metabolic pathways related to membrane transporter and cell motility showed sensitive to AgNPs exposure in the soil. Further studies involving metabolomics are necessary to reveal the essential effects of AgNPs and CH3COOAg on biogeochemical cycle of elements in agricultural soil.
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Affiliation(s)
- Jinhao Dong
- School of Water Conservancy and Environment, University of Jinan, Jinan 250022, China
| | - Baoshan Yang
- School of Water Conservancy and Environment, University of Jinan, Jinan 250022, China; Shandong Provincial Engineering Technology Research Center for Ecological Carbon Sink and Capture Utilization, Jinan 250022, China.
| | - Hui Wang
- School of Water Conservancy and Environment, University of Jinan, Jinan 250022, China; Shandong Provincial Engineering Technology Research Center for Ecological Carbon Sink and Capture Utilization, Jinan 250022, China.
| | - Xinlei Cao
- School of Water Conservancy and Environment, University of Jinan, Jinan 250022, China
| | - Fei He
- Jinan Environmental Research Academy, Jinan 250098, China
| | - Lijiao Wang
- School of Water Conservancy and Environment, University of Jinan, Jinan 250022, China
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6
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He G, Yang Y, Liu G, Zhang Q, Liu W. Global analysis of the perturbation effects of metal-based nanoparticles on soil nitrogen cycling. GLOBAL CHANGE BIOLOGY 2023; 29:4001-4017. [PMID: 37082828 DOI: 10.1111/gcb.16735] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/28/2022] [Revised: 04/01/2023] [Accepted: 04/17/2023] [Indexed: 05/03/2023]
Abstract
Although studies have investigated the effects of metal-based nanoparticles (MNPs) on soil biogeochemical processes, the results obtained thus far are highly variable. Moreover, we do not yet understand how the impact of MNPs is affected by experimental design and environmental conditions. Herein, we conducted a global analysis to synthesize the effects of MNPs on 17 variables associated with soil nitrogen (N) cycling from 62 studies. Our results showed that MNPs generally exerted inhibitory effects on N-cycling process rates, N-related enzyme activities, and microbial variables. The response of soil N cycling varied with MNP type, and exposure dose was the most decisive factor for the variations in the responses of N-cycling process rates and enzyme activities. Notably, Ag/Ag2 S and CuO had dose-dependent inhibitory effects on ammonia oxidation rates, while CuO and Zn/ZnO showed hormetic effects on nitrification and denitrification rates, respectively. Other experimental design factors (e.g., MNP size and exposure duration) also regulated the effect of MNPs on soil N cycling, and specific MNPs, such as Ag/Ag2 S, exerted stronger effects during long-term (>28 days) exposure. Environmental conditions, including soil pH, organic carbon, texture, and presence/absence of plants, significantly influenced MNP toxicity. For instance, the effects of Ag/Ag2 S on the ammonia oxidation rate and the activity of leucine aminopeptidase were more potent in acid (pH <6), organic matter-limited (organic carbon content ≤10 g kg-1 ), and coarser soils. Overall, these results provide new insights into the general mechanisms by which MNPs alter soil N processes in different environments and underscore the urgent need to perform multivariate and long-term in situ trials in simulated natural environments.
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Affiliation(s)
- Gang He
- CAS Key Laboratory of Aquatic Botany and Watershed Ecology, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Yuyi Yang
- CAS Key Laboratory of Aquatic Botany and Watershed Ecology, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan, China
| | - Guihua Liu
- CAS Key Laboratory of Aquatic Botany and Watershed Ecology, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan, China
| | - Quanfa Zhang
- CAS Key Laboratory of Aquatic Botany and Watershed Ecology, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan, China
| | - Wenzhi Liu
- CAS Key Laboratory of Aquatic Botany and Watershed Ecology, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan, China
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7
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Zhang Z, Lin J, Chen Z. Predicting the effect of silver nanoparticles on soil enzyme activity using the machine learning method: type, size, dose and exposure time. JOURNAL OF HAZARDOUS MATERIALS 2023; 457:131789. [PMID: 37301072 DOI: 10.1016/j.jhazmat.2023.131789] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/27/2023] [Revised: 06/03/2023] [Accepted: 06/04/2023] [Indexed: 06/12/2023]
Abstract
In this study, machine learning models predicted the impact of silver nanoparticles (AgNPs) on soil enzymes. Artificial neural network (ANN) optimized with genetic algorithm (GA) (MAE = 0.1174) was more suitable for simulating overall trends, while the gradient boosting machine (GBM) and random forest (RF) were ideal for small-scale analysis. According to partial dependency profile (PDP) analysis, polyvinylpyrrolidone coated AgNPs (PVP-AgNPs) had the most inhibitory effect (average of 49.5%) on soil enzyme activity among the three types of AgNPs at the same dose (0.02-50 mg/kg). The ANN model predicted that enzyme activity first declined and then rose when AgNPs increased in size. Based on predictions from the ANN and RF models, when exposed to uncoated AgNPs, soil enzyme activities continued to decrease before 30 d, but gradually rose from 30 to 90 d, and fell slightly after 90 d. The ANN model indicated the importance order of four factors: dose > type > size > exposure time. The RF model suggested the enzyme was more sensitive when experiments were conducted at doses, sizes, and exposure times of 0.01-1 mg/kg, 50-100 nm, and 30-90 d, respectively. This study presents new insights on the regularity of soil enzyme responses to AgNPs.
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Affiliation(s)
- Zhenjun Zhang
- Fujian Key Laboratory of Pollution Control and Resource Reuse, College of Environmental and Resource Sciences, Fujian Normal University, Fuzhou 350117, Fujian Province, China
| | - Jiajiang Lin
- Fujian Key Laboratory of Pollution Control and Resource Reuse, College of Environmental and Resource Sciences, Fujian Normal University, Fuzhou 350117, Fujian Province, China.
| | - Zuliang Chen
- Fujian Key Laboratory of Pollution Control and Resource Reuse, College of Environmental and Resource Sciences, Fujian Normal University, Fuzhou 350117, Fujian Province, China.
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8
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Dias Samarajeewa A, Velicogna JR, Schwertfeger DM, Meier MJ, Subasinghe RM, Princz JI, Scroggins RP, Beaudette LA. Cerium oxide nanoparticles (nCeO 2) exert minimal adverse effects on microbial communities in soils with and without biosolids amendment. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023:10.1007/s11356-023-27313-6. [PMID: 37166732 DOI: 10.1007/s11356-023-27313-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 12/05/2022] [Accepted: 04/25/2023] [Indexed: 05/12/2023]
Abstract
Increased use of nano-cerium oxide (nCeO2) in an array of industrial applications has raised environmental concerns due to potential increased loadings to the soil environment. This research investigated the potential adverse effects of nCeO2 (10-30 nm) on the soil microbial community in two exposure scenarios: direct application to soil, and indirect application to soil through chemical spiking of biosolids, followed by mixing into soil. Total Ce in test soils without, and with biosolids amendment, ranged from 44 to 770, and 73 to 664 mg Ce kg-1 soil, respectively. In order to help distinguish whether observed effects were elicited by the solid-phase colloids or the activity of dissolved Ce, a soluble Ce salt (Ce (NO3)3) treatment was included in select assays. A suite of tests was used to investigate effects on critical processes: microbial growth (heterotrophic plate count), microbial activity (organic matter (OM) decomposition, enzyme activity and, nitrification) and diversity (structural and functional). Although results showed significant inhibition on microbial growth in soil without biosolids amendment at ≥ 156 mg Ce kg-1 soil by week 5, these results were inconsistent and non-significant thereafter. In general, nCeO2 showed no evidence of consistent adverse effects on OM decomposition, nitrification, soil enzyme activities and functional diversity. Leucine aminopeptidase showed significant (p< 0.05) stimulatory effects over time at ≥ 44 mg Ce kg-1 in soils without biosolids, which was not observed in soils with biosolids amendment. The lack of inhibitory effects of nCeO2 may be attributed to its low solubility; Ce in soil extracts (0.01 M CaCl2) were all below detection (< 0.003 mg kg-1) in the nCeO2-spiked soils, but detectable in the Ce (NO3)3 samples. In contrast, soluble Ce at 359 mg Ce kg-1 showed a significant reduction in OM decomposition and effects on microbial genomic diversity based on the 16S rDNA data in soils with and without biosolids amendment (359 and 690 mg Ce kg-1). The nCeO2 behaviour and effects information described herein are expected to help fulfill data gaps for the characterization of this priority nanomaterial.
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Affiliation(s)
- Ajith Dias Samarajeewa
- Biological Assessment and Standardization Section, Environment and Climate Change Canada, 335 River Road, Ottawa, Ontario, K1V 1C7, Canada.
| | - Jessica R Velicogna
- Biological Assessment and Standardization Section, Environment and Climate Change Canada, 335 River Road, Ottawa, Ontario, K1V 1C7, Canada
| | - Dina M Schwertfeger
- Biological Assessment and Standardization Section, Environment and Climate Change Canada, 335 River Road, Ottawa, Ontario, K1V 1C7, Canada
| | - Matthew J Meier
- Biological Assessment and Standardization Section, Environment and Climate Change Canada, 335 River Road, Ottawa, Ontario, K1V 1C7, Canada
| | - Renuka M Subasinghe
- Biological Assessment and Standardization Section, Environment and Climate Change Canada, 335 River Road, Ottawa, Ontario, K1V 1C7, Canada
| | - Juliska I Princz
- Biological Assessment and Standardization Section, Environment and Climate Change Canada, 335 River Road, Ottawa, Ontario, K1V 1C7, Canada
| | - Rick P Scroggins
- Biological Assessment and Standardization Section, Environment and Climate Change Canada, 335 River Road, Ottawa, Ontario, K1V 1C7, Canada
| | - Lee A Beaudette
- Biological Assessment and Standardization Section, Environment and Climate Change Canada, 335 River Road, Ottawa, Ontario, K1V 1C7, Canada
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9
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Yu Y, Wu C, Li X, Wu L, Yang Q, Petropoulos E, Feng Y. The impact of Ag nanoparticles on methane emission in two typical paddy soils. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2023; 323:121215. [PMID: 36740168 DOI: 10.1016/j.envpol.2023.121215] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/23/2022] [Revised: 01/10/2023] [Accepted: 02/03/2023] [Indexed: 06/18/2023]
Abstract
Numerous applications of Ag nanoparticles (AgNPs) have increased the likelihood of their release and accumulation in agroecosystem. Thus far, few studies have evaluated the impacts of AgNPs to soil methane emissions and the microbial dynamics. In this study, microcosmic experiments were conducted to investigate the responses of methanogenic processes from two paddy soils (Cambisols and Ultisols) subjected to four AgNPs doses (0.1, 1, 10 and 50 mg/kg). The results showed that 0.1 and 1 mg/kg AgNPs had no significant effects on CH4 emissions, but 50 mg/kg AgNPs increased soil CH4 emissions in both paddy soils. The aggravation effect of AgNPs on CH4 emissions was more apparent in Ultisols compared to Cambisols paddy soils. Real-time PCR suggested that 50 mg/kg AgNPs significantly increased the ratio of methanogenic to bacterial gene for both paddy soils. Amplicon sequencing indicated that methanogenic community was clustered into a separate group after 50 mg/kg AgNPs exposure. Structural equation model illustrated that Methanosarcinales was both significantly responded to AgNPs in Cambisols and Ultisols soils; however, Methanocellales significantly responded to AgNPs only in Cambisols soils. Subsequently, uncontrolled use of AgNPs may account as an environmental risk due to the potentially increased soil CH4 emissions in paddy ecosystems.
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Affiliation(s)
- Yongjie Yu
- Key Laboratory of Agrometeorology of Jiangsu Province, Nanjing University of Information Science & Technology, Nanjing 210044, China
| | - Chen Wu
- Key Laboratory of Agrometeorology of Jiangsu Province, Nanjing University of Information Science & Technology, Nanjing 210044, China
| | - Xin Li
- College of Chemical Engineering, Nanjing Forestry University, Nanjing 210037, China
| | - Lingyu Wu
- Key Laboratory of Agrometeorology of Jiangsu Province, Nanjing University of Information Science & Technology, Nanjing 210044, China
| | - Qinyu Yang
- Key Laboratory of Agrometeorology of Jiangsu Province, Nanjing University of Information Science & Technology, Nanjing 210044, China
| | | | - Youzhi Feng
- College of Chemical Engineering, Nanjing Forestry University, Nanjing 210037, China; State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China; Jiangsu Collaborative Innovation Center for Solid Organic Waste Resource Utilization, Nanjing 210095, China.
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10
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Zhang X, Hou X, Ma L, Shi Y, Zhang D, Qu K. Analytical methods for assessing antimicrobial activity of nanomaterials in complex media: advances, challenges, and perspectives. J Nanobiotechnology 2023; 21:97. [PMID: 36941596 PMCID: PMC10026445 DOI: 10.1186/s12951-023-01851-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2022] [Accepted: 03/07/2023] [Indexed: 03/23/2023] Open
Abstract
Assessing the antimicrobial activity of engineered nanomaterials (ENMs), especially in realistic scenarios, is of great significance for both basic research and applications. Multiple analytical methods are available for analysis via off-line or on-line measurements. Real-world samples are often complex with inorganic and organic components, which complicates the measurements of microbial viability and/or metabolic activity. This article highlights the recent advances achieved in analytical methods including typical applications and specifics regarding their accuracy, cost, efficiency, and user-friendliness. Methodological drawbacks, technique gaps, and future perspectives are also discussed. This review aims to help researchers select suitable methods for gaining insight into antimicrobial activities of targeted ENMs in artificial and natural complex matrices.
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Affiliation(s)
- Xuzhi Zhang
- Laboratory for Marine Fisheries Science and Food Production Processes, Pilot National Laboratory for Marine Science and Technology, Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao, 266071, China
| | - Xiangyi Hou
- School of Marine Ecology and Environment, Shanghai Ocean University, Shanghai, 201306, China
- Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, Qingdao, 266100, China
| | - Liangyu Ma
- Laboratory for Marine Fisheries Science and Food Production Processes, Pilot National Laboratory for Marine Science and Technology, Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao, 266071, China
| | - Yaqi Shi
- Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, Qingdao, 266100, China
| | - Dahai Zhang
- Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, Qingdao, 266100, China.
| | - Keming Qu
- Laboratory for Marine Fisheries Science and Food Production Processes, Pilot National Laboratory for Marine Science and Technology, Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao, 266071, China.
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11
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Wei Q, Zhang J, Luo F, Shi D, Liu Y, Liu S, Zhang Q, Sun W, Yuan J, Fan H, Wang H, Qi L, Liu G. Molecular mechanisms through which different carbon sources affect denitrification by Thauera linaloolentis: Electron generation, transfer, and competition. ENVIRONMENT INTERNATIONAL 2022; 170:107598. [PMID: 36395558 DOI: 10.1016/j.envint.2022.107598] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/06/2022] [Revised: 09/24/2022] [Accepted: 10/20/2022] [Indexed: 06/16/2023]
Abstract
Characterizing the molecular mechanism through which different carbon sources affect the denitrification process would provide a basis for the proper selection of carbon sources, thus avoiding excessive carbon source dosing and secondary pollution while also improving denitrification efficiency. Here, we selected Thauera linaloolentis as a model organism of denitrification, whose genomic information was elucidated by draft genome sequencing and KEGG annotations, to investigate the growth kinetics, denitrification performances and characteristics of metabolic pathways under diverse carbon source conditions. We reconstructed a metabolic network of Thauera linaloolentis based on genomic analysis to help develop a systematic method of researching electron pathways. Our findings indicated that carbon sources with simple metabolic pathways (e.g., ethanol and sodium acetate) promoted the reproduction of Thauera linaloolentis, and its maximum growth density reached OD600 = 0.36 and maximum specific growth rate reached 0.145 h-1. These carbon sources also accelerated the denitrification process without the accumulation of intermediates. Nitrate could be reduced completely under any carbon source condition; but in the "glucose group", the maximum accumulation of nitrite was 117.00 mg/L (1.51 times more than that in the "ethanol group", which was 77.41 mg/L), the maximum accumulation of nitric oxide was 363.02 μg/L (7.35 times more than that in the "ethanol group", which was 49.40 μg/L), and the maximum accumulation of nitrous oxide was 22.58 mg/L (26.56 times more than that in the "ethanol group", which was 0.85 mg/L). Molecular biological analyses demonstrated that diverse types of carbon sources directly induced different carbon metabolic activities, resulting in variations in electron generation efficiency. Furthermore, the activities of the electron transport system were positively correlated with different carbon metabolic activities. Finally, these differences were reflected in the phenomenon of electronic competition between denitrifying reductases. Thus we concluded that this was the main molecular mechanism through which the carbon source type affected the denitrification process. In brief, carbon sources with simple metabolic pathways induced higher efficiency of electron generation, transfer, and competition, which promoted rapid proliferation and complete denitrification; otherwise Thauera linaloolentis would grow slowly and intermediate products would accumulate seriously. Our study established a method to evaluate and optimize carbon source utilization efficiency based on confirmed molecular mechanisms.
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Affiliation(s)
- Qi Wei
- Low-carbon Water Environmental Technology Center, School of Environment & Natural Resource, Renmin University of China, 59 Zhongguancun Street, Beijing 100872, PR China
| | - Jinsen Zhang
- Low-carbon Water Environmental Technology Center, School of Environment & Natural Resource, Renmin University of China, 59 Zhongguancun Street, Beijing 100872, PR China
| | - Fangzhou Luo
- Low-carbon Water Environmental Technology Center, School of Environment & Natural Resource, Renmin University of China, 59 Zhongguancun Street, Beijing 100872, PR China
| | - Dinghuan Shi
- Low-carbon Water Environmental Technology Center, School of Environment & Natural Resource, Renmin University of China, 59 Zhongguancun Street, Beijing 100872, PR China
| | - Yuchen Liu
- Low-carbon Water Environmental Technology Center, School of Environment & Natural Resource, Renmin University of China, 59 Zhongguancun Street, Beijing 100872, PR China
| | - Shuai Liu
- Low-carbon Water Environmental Technology Center, School of Environment & Natural Resource, Renmin University of China, 59 Zhongguancun Street, Beijing 100872, PR China
| | - Qian Zhang
- Low-carbon Water Environmental Technology Center, School of Environment & Natural Resource, Renmin University of China, 59 Zhongguancun Street, Beijing 100872, PR China
| | - Wenzhuo Sun
- Low-carbon Water Environmental Technology Center, School of Environment & Natural Resource, Renmin University of China, 59 Zhongguancun Street, Beijing 100872, PR China
| | - Junli Yuan
- Low-carbon Water Environmental Technology Center, School of Environment & Natural Resource, Renmin University of China, 59 Zhongguancun Street, Beijing 100872, PR China
| | - Haitao Fan
- Low-carbon Water Environmental Technology Center, School of Environment & Natural Resource, Renmin University of China, 59 Zhongguancun Street, Beijing 100872, PR China
| | - Hongchen Wang
- Low-carbon Water Environmental Technology Center, School of Environment & Natural Resource, Renmin University of China, 59 Zhongguancun Street, Beijing 100872, PR China.
| | - Lu Qi
- Low-carbon Water Environmental Technology Center, School of Environment & Natural Resource, Renmin University of China, 59 Zhongguancun Street, Beijing 100872, PR China.
| | - Guohua Liu
- Low-carbon Water Environmental Technology Center, School of Environment & Natural Resource, Renmin University of China, 59 Zhongguancun Street, Beijing 100872, PR China
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12
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Przemieniecki SW, Oćwieja M, Ciesielski S, Halecki W, Matras E, Gorczyca A. Chemical Structure of Stabilizing Layers of Negatively Charged Silver Nanoparticles as an Effector of Shifts in Soil Bacterial Microbiome under Short-Term Exposure. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2022; 19:14438. [PMID: 36361318 PMCID: PMC9658158 DOI: 10.3390/ijerph192114438] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/03/2022] [Revised: 10/23/2022] [Accepted: 10/25/2022] [Indexed: 06/16/2023]
Abstract
In this work, we have assessed the exposure of soil bacteria from potato monoculture to three types of silver nanoparticles (AgNPs) as well as silver ions (Ag+ ions) delivered in the form of silver nitrate and a commercially available fungicide. The diversity of the soil microbial community, enzymatic activity, and carbon source utilization were evaluated. It was found that only the fungicide significantly limited the abundance and activity of soil bacteria. Silver ions significantly reduced bacterial metabolic activity. In turn, one type of AgNPs prepared with the use of tannic acid (TA) increased bacterial load and activity. There was found in all AgNPs treated soils (1) a greater proportion of all types of persistent bacteria, i.e., Bacillus, Paenibacillus, and Clostridium; (2) a visible decrease in the proportion of Nocardioides, Arthrobacter, and Candidatus Solibacter; (3) almost complete depletion of Pseudomonas; (4) increase in the number of low-frequency taxa and decrease in dominant taxa compared to the control soil. Despite the general trend of qualitative changes in the bacterial community, it was found that the differences in the chemical structure of the AgNP stabilizing layers had a significant impact on the specific metabolic activity resulting from qualitative changes in the microbiome.
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Affiliation(s)
- Sebastian Wojciech Przemieniecki
- Department of Entomology, Phytopathology and Molecular Diagnostics, University of Warmia and Mazury in Olsztyn, Prawochenskiego 17, PL-10721 Olsztyn, Poland
| | - Magdalena Oćwieja
- Jerzy Haber Institute of Catalysis and Surface Chemistry Polish Academy of Sciences, Niezapominajek 8, PL-30239 Krakow, Poland
| | - Sławomir Ciesielski
- Department of Environmental Biotechnology, University of Warmia and Mazury in Olsztyn, Słoneczna 45G, PL-10719 Olsztyn, Poland
| | - Wiktor Halecki
- Institute of Nature Conservation, Polish Academy of Sciences, Mickiewicza 33, PL-31120 Kraków, Poland
| | - Ewelina Matras
- Department of Microbiology and Biomonitoring, University of Agriculture in Krakow, Mickiewicza 21, PL-31120 Krakow, Poland
| | - Anna Gorczyca
- Department of Microbiology and Biomonitoring, University of Agriculture in Krakow, Mickiewicza 21, PL-31120 Krakow, Poland
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Sun C, Hu K, Mu D, Wang Z, Yu X. The Widespread Use of Nanomaterials: The Effects on the Function and Diversity of Environmental Microbial Communities. Microorganisms 2022; 10:microorganisms10102080. [PMID: 36296356 PMCID: PMC9609405 DOI: 10.3390/microorganisms10102080] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2022] [Revised: 10/07/2022] [Accepted: 10/18/2022] [Indexed: 11/05/2022] Open
Abstract
In recent years, as an emerging material, nanomaterials have rapidly expanded from laboratories to large-scale industrial productions. Along with people's productive activities, these nanomaterials can enter the natural environment of soil, water and atmosphere through various ways. At present, a large number of reports have proved that nanomaterials have certain toxic effects on bacteria, algae, plants, invertebrates, mammalian cell lines and mammals in these environments, but people still know little about the ecotoxicology of nanomaterials. Most relevant studies focus on the responses of model strains to nanomaterials in pure culture conditions, but these results do not fully represent the response of microbial communities to nanomaterials in natural environments. Over the years, the effect of nanomaterials infiltrated into the natural environment on the microbial communities has become a popular topic in the field of nano-ecological environment research. It was found that under different environmental conditions, nanomaterials have various effects on the microbial communities. The medium; the coexisting pollutants in the environment and the structure, particle size and surface modification of nanomaterials may cause changes in the structure and function of microbial communities. This paper systematically summarizes the impacts of different nanomaterials on microbial communities in various environments, which can provide a reference for us to evaluate the impacts of nanomaterials released into the environment on the microecology and has certain guiding significance for strengthening the emission control of nanomaterials pollutants.
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Affiliation(s)
- Chunshui Sun
- College of Marine Science, Shandong University, Weihai 264209, China
| | - Ke Hu
- College of Marine Science, Shandong University, Weihai 264209, China
| | - Dashuai Mu
- College of Marine Science, Shandong University, Weihai 264209, China
| | - Zhijun Wang
- Institute for Advanced Study, Chengdu University, 2025 Chengluo Avenue, Chengdu 610106, China
| | - Xiuxia Yu
- College of Marine Science, Shandong University, Weihai 264209, China
- Correspondence:
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14
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Silva I, Alves M, Malheiro C, Silva ARR, Loureiro S, Henriques I, González-Alcaraz MN. Short-Term Responses of Soil Microbial Communities to Changes in Air Temperature, Soil Moisture and UV Radiation. Genes (Basel) 2022; 13:genes13050850. [PMID: 35627235 PMCID: PMC9142034 DOI: 10.3390/genes13050850] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2022] [Revised: 05/04/2022] [Accepted: 05/07/2022] [Indexed: 01/31/2023] Open
Abstract
We analyzed the effects on a soil microbial community of short-term alterations in air temperature, soil moisture and ultraviolet radiation and assessed the role of invertebrates (species Enchytraeus crypticus) in modulating the community’s response to these factors. The reference soil, Lufa 2.2, was incubated for 48 h, with and without invertebrates, under the following conditions: standard (20 °C + 50% water holding capacity (WHC)); increased air temperature (15–25 °C or 20–30 °C + 50% WHC); flood (20 °C + 75% WHC); drought (20 °C + 25% WHC); and ultraviolet radiation (UV) (20 °C + 50% WHC + UV). BIOLOG EcoPlates and 16S rDNA sequencing (Illumina) were used to assess the microbial community’s physiological profile and the bacterial community’s structure, respectively. The bacterial abundance (estimated by 16S rDNA qPCR) did not change. Most of the conditions led to an increase in microbial activity and a decrease in diversity. The structure of the bacterial community was particularly affected by higher air temperatures (20–30 °C, without E. crypticus) and floods (with E. crypticus). Effects were observed at the class, genera and OTU levels. The presence of invertebrates mostly resulted in the attenuation of the observed effects, highlighting the importance of considering microbiome–invertebrate interactions. Considering future climate changes, the effects described here raise concern. This study provides fundamental knowledge to develop effective strategies to mitigate these negative outcomes. However, long-term studies integrating biotic and abiotic factors are needed.
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Affiliation(s)
- Isabel Silva
- CEF (Center for Functional Ecology), Department of Life Sciences, Faculty of Sciences and Technology, University of Coimbra, 3000-456 Coimbra, Portugal;
- CESAM (Centre for Marine and Environmental Studies), Department of Biology, University of Aveiro, 3810-193 Aveiro, Portugal; (C.M.); (A.R.R.S.); (S.L.)
| | - Marta Alves
- CBQF—Center for Biotechnology and Fine Chemistry, School of Biotechnology, Portuguese Catholic University, 4169-005 Porto, Portugal;
| | - Catarina Malheiro
- CESAM (Centre for Marine and Environmental Studies), Department of Biology, University of Aveiro, 3810-193 Aveiro, Portugal; (C.M.); (A.R.R.S.); (S.L.)
| | - Ana Rita R. Silva
- CESAM (Centre for Marine and Environmental Studies), Department of Biology, University of Aveiro, 3810-193 Aveiro, Portugal; (C.M.); (A.R.R.S.); (S.L.)
| | - Susana Loureiro
- CESAM (Centre for Marine and Environmental Studies), Department of Biology, University of Aveiro, 3810-193 Aveiro, Portugal; (C.M.); (A.R.R.S.); (S.L.)
| | - Isabel Henriques
- CEF (Center for Functional Ecology), Department of Life Sciences, Faculty of Sciences and Technology, University of Coimbra, 3000-456 Coimbra, Portugal;
- Correspondence: (I.H.); (M.N.G.-A.)
| | - M. Nazaret González-Alcaraz
- Department of Agricultural Engineering of the E.T.S.I.A. & Soil Ecology and Biotechnology Unit of the Institute of Plant Biotechnology, Technical University of Cartagena, 30203 Cartagena, Spain
- Correspondence: (I.H.); (M.N.G.-A.)
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15
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Jiao K, Yang B, Wang H, Xu W, Zhang C, Gao Y, Sun W, Li F, Ji D. The individual and combined effects of polystyrene and silver nanoparticles on nitrogen transformation and bacterial communities in an agricultural soil. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 820:153358. [PMID: 35077800 DOI: 10.1016/j.scitotenv.2022.153358] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/09/2021] [Revised: 01/18/2022] [Accepted: 01/19/2022] [Indexed: 06/14/2023]
Abstract
The effects of emerging contaminants micro/nanoplastics (MPs/NPs) and silver nanoparticles (Ag NPs) on health have attracted universal concern throughout the world. However, it is unclear on the combined effects of MPs/NPs and Ag NPs on the biogeochemistry cycle such as nitrogen transformation and functional microorganism in the soil. In the present study, we conducted a 45-day soil microcosm experiment with polystyrene (PS) MPs/NPs and Ag NPs to investigate their combined impact on nitrogen cycling and the bacterial community. The results showed that MPs or NPs exerted limited effects on nitrogen transformation in the soil. The combined effects of PS MPs/NPs and Ag NPs were mainly caused by the presence of Ag NPs. However, PS NPs alleviated the inhibition of anammox and denitrification induced by Ag NPs via upregulating anammox-related genes and elevating nitrate and nitrite reductase activities. PS MPs + Ag NPs treatment significantly reduced bacterial diversity. PS MPs/NPs + Ag NPs increased the relative abundances of denitrifying Cupriavidus by 0.32% and 0.06% but decreased nitrogen-fixing functional microorganisms of Microvirga (by 2.05% and 2.24%), Bacillus (by 0.16% and 0.22%), and Herbaspirillum (by 0.14% and 0.07%) at the genus level compared with Ag NPs alone. The significant downregulation of nitrogen-fixing genes (K02586, K02588, and K02591) was observed in PS MPs/NPs + Ag NPs treatment compared to Ag NPs in the nitrogen metabolism pathway. Moreover, g-Lysobacter and g-Aquimonas were identified as biomarkers in PS MPs + Ag NPs and PS NPs + Ag NPs by LEfSe analysis. Our study sheds the light that changes of functional microorganism abundances contributed to the alteration of nitrogen transformation. Taking the particle size of plastics into account will be helpful to accurately assess the combined ecological risks of plastics and nanomaterial contaminants.
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Affiliation(s)
- Keqin Jiao
- School of Water Conservancy and Environment, University of Jinan, Jinan 250022, China; Shaanxi Key Laboratory of Land Consolidation, Xi'an 710054, China
| | - Baoshan Yang
- School of Water Conservancy and Environment, University of Jinan, Jinan 250022, China; Shaanxi Key Laboratory of Land Consolidation, Xi'an 710054, China
| | - Hui Wang
- School of Water Conservancy and Environment, University of Jinan, Jinan 250022, China; Shaanxi Key Laboratory of Land Consolidation, Xi'an 710054, China.
| | - Wenxue Xu
- School of Water Conservancy and Environment, University of Jinan, Jinan 250022, China; Shaanxi Key Laboratory of Land Consolidation, Xi'an 710054, China
| | - Chuanfeng Zhang
- School of Water Conservancy and Environment, University of Jinan, Jinan 250022, China; Shaanxi Key Laboratory of Land Consolidation, Xi'an 710054, China
| | - Yongchao Gao
- Ecology Institute, Qilu University of Technology (Shandong Academy of Sciences), Shandong Provincial Key Laboratory of Applied Microbiology, 28789 East Jingshi Road, Jinan 250103, China
| | - Wen Sun
- School of Water Conservancy and Environment, University of Jinan, Jinan 250022, China; Shaanxi Key Laboratory of Land Consolidation, Xi'an 710054, China
| | - Feng Li
- School of Water Conservancy and Environment, University of Jinan, Jinan 250022, China; Shaanxi Key Laboratory of Land Consolidation, Xi'an 710054, China
| | - Dandan Ji
- College of Environmental Science and Engineering, Qilu University of Technology (Shandong Academy of Science), Jinan 250353, China
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16
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Wang B, Allison SD. Climate-Driven Legacies in Simulated Microbial Communities Alter Litter Decomposition Rates. Front Ecol Evol 2022. [DOI: 10.3389/fevo.2022.841824] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
The mechanisms underlying diversity-functioning relationships have been a consistent area of inquiry in biogeochemistry since the 1950s. Though these mechanisms remain unresolved in soil microbiomes, many approaches at varying scales have pointed to the same notion—composition matters. Confronting the methodological challenge arising from the complexity of microbiomes, this study used the model DEMENTpy, a trait-based modeling framework, to explore trait-based drivers of microbiome-dependent litter decomposition. We parameterized DEMENTpy for five sites along a climate gradient in Southern California, United States, and conducted reciprocal transplant simulations analogous to a prior empirical study. The simulations demonstrated climate-dependent legacy effects of microbial communities on plant litter decomposition across the gradient. This result is consistent with the previous empirical study across the same gradient. An analysis of community-level traits further suggests that a 3-way tradeoff among resource acquisition, stress tolerance, and yield strategies influences community assembly. Simulated litter decomposition was predictable with two community traits (indicative of two of the three strategies) plus local environment, regardless of the system state (transient vs. equilibrium). Although more empirical confirmation is still needed, community traits plus local environmental factors (e.g., environment and litter chemistry) may robustly predict litter decomposition across spatial-temporal scales. In conclusion, this study offers a potential trait-based explanation for climate-dependent community effects on litter decomposition with implications for improved understanding of whole-ecosystem functioning across scales.
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17
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Gray DB, Gagnon V, Button M, Farooq AJ, Patch DJ, Wallace SJ, Koch I, O'Carroll DM, Weber KP. Silver nanomaterials released from commercial textiles have minimal impacts on soil microbial communities at environmentally relevant concentrations. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 806:151248. [PMID: 34715213 DOI: 10.1016/j.scitotenv.2021.151248] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/08/2021] [Revised: 09/30/2021] [Accepted: 10/22/2021] [Indexed: 06/13/2023]
Abstract
Silver nanomaterials (Ag NMs) have been used in a variety of commercial products to take advantage of their antimicrobial properties. However, there are concerns that these AgNMs can be released during/after use and enter wastewater streams, potentially impacting aquatic systems or accumulating in wastewater biosolids. Biosolids, which are a residual of wastewater treatment processes, have been found to contain AgNMs and are frequently used as agricultural fertilizer. Since the function of soil microbial communities is imperative to nutrient cycling and agricultural productivity, it is important to characterize and assess the effects that silver nanomaterials could have in agricultural soils. In this study agricultural soil was amended with pristine engineered (PVP-coated or uncoated AgNMs), aged silver (sulphidized or released from textiles) nanomaterials, and ionic silver to determine the fate and toxicity over the course of three months. Exposures were carried out at various environmentally relevant concentrations (1 and 10 mg Ag/kg soil) representing between 30 to over 800 years of equivalent biosolid loadings. Over thirteen different methodologies and measures were used throughout this study to assess for potential effects of the silver nanomaterials on soil, including microbial community composition, average well colour development (AWCD) and enzymatic activity. Overall, the AgNM exposures did not exhibit significant toxic effects to the soil microbial communities in terms of density, activity, function and diversity. However, the positive ionic silver treatment (100 mg Ag/kg soil) resulted in suppression to microbial activity while also resulting in significantly higher populations of Frankia alni (nitrogen-fixer) and Arenimonas malthae (phytopathogen) as compared to the negative control (p < 0.05, Tukey HSD) which warrants further investigation.
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Affiliation(s)
- Devon B Gray
- Environmental Sciences Group, Department of Chemistry and Chemical Engineering, Royal Military College of Canada, Kingston, ON K7K 7B4, Canada
| | - Vincent Gagnon
- Environmental Sciences Group, Department of Chemistry and Chemical Engineering, Royal Military College of Canada, Kingston, ON K7K 7B4, Canada
| | - Mark Button
- Environmental Sciences Group, Department of Chemistry and Chemical Engineering, Royal Military College of Canada, Kingston, ON K7K 7B4, Canada; Fipke Laboratory for Trace Element Research, University of British Columbia Okanagan, Kelowna, V1V 1V7, British Columbia, Canada
| | - Anbareen J Farooq
- Environmental Sciences Group, Department of Chemistry and Chemical Engineering, Royal Military College of Canada, Kingston, ON K7K 7B4, Canada
| | - David J Patch
- Environmental Sciences Group, Department of Chemistry and Chemical Engineering, Royal Military College of Canada, Kingston, ON K7K 7B4, Canada
| | - Sarah J Wallace
- Environmental Sciences Group, Department of Chemistry and Chemical Engineering, Royal Military College of Canada, Kingston, ON K7K 7B4, Canada
| | - Iris Koch
- Environmental Sciences Group, Department of Chemistry and Chemical Engineering, Royal Military College of Canada, Kingston, ON K7K 7B4, Canada
| | - Denis M O'Carroll
- School of Civil and Environmental Engineering, UNSW Water Research Laboratory, University of New South Wales Sydney, Manly Vale, NSW 2093, Australia
| | - Kela P Weber
- Environmental Sciences Group, Department of Chemistry and Chemical Engineering, Royal Military College of Canada, Kingston, ON K7K 7B4, Canada.
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Burketová L, Martinec J, Siegel J, Macůrková A, Maryška L, Valentová O. Noble metal nanoparticles in agriculture: impacts on plants, associated microorganisms, and biotechnological practices. Biotechnol Adv 2022; 58:107929. [DOI: 10.1016/j.biotechadv.2022.107929] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2021] [Revised: 02/14/2022] [Accepted: 02/15/2022] [Indexed: 02/07/2023]
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19
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Effect of In Situ Bioremediation of Soil Contaminated with DDT and DDE by Stenotrophomonas sp. Strain DXZ9 and Ryegrass on Soil Microorganism. MICROBIOLOGY RESEARCH 2022. [DOI: 10.3390/microbiolres13010005] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
In the present study, the changes in the microbial populations, enzyme activity and bacterial community structure in contaminated soils were investigated during the bioremediation of using Stenotrophomonas sp. strain DXZ9 and ryegrass. The results showed that the removal rates were 81% for DDT and 55% for DDE (69% for DDTs) with ryegrass-microbe. Microbial activity was remarkably improved, and the number of bacteria increased sharply from 7.32 × 106 to 2.56 × 108 cells/g in the 10 days due to successful colonization of the strains and effects of the ryegrass rhizosphere. There was significant difference in fungi number with ryegrass when comparing the 30th and 90th days with the 210th day: The actinomycete number in the soil with ryegrass was higher than without ryegrass, and it indicated that the number of microorganisms significantly increased under the action of ryegrass. The activities of polyphenol oxidase, dehydrogenase and catalase were significantly activated by the combination of ryegrass and microbe, and urease activity was less affected: It has influence on the diversity of bacterial community structure in the soil, but its influence gradually decreased by denaturing gradient gel electrophoresis with an extension in time. The activities represented promising tools for decontaminating and restoring the ecosystem in sustainable ways, and proposing new approaches and technological bottlenecks to promote DDT biodegradation is very significant.
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Li W, Zhang P, Qiu H, Van Gestel CAM, Peijnenburg WJGM, Cao X, Zhao L, Xu X, He E. Commonwealth of Soil Health: How Do Earthworms Modify the Soil Microbial Responses to CeO 2 Nanoparticles? ENVIRONMENTAL SCIENCE & TECHNOLOGY 2022; 56:1138-1148. [PMID: 34964610 DOI: 10.1021/acs.est.1c06592] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Soil ecotoxicological assays on nanoparticles (NPs) have mainly investigated single components (e.g., plants, fauna, and microbes) within the ecosystem, neglecting possible effects resulting from the disturbance of the interactions between these components. Here, we investigated soil microbial responses to CeO2 NPs in the presence and absence of earthworms from the perspectives of microbial functions (i.e., enzyme activities), the community structure, and soil metabolite profiles. Exposure to CeO2 NPs (50, 500 mg/kg) alone decreased the activities of enzymes (i.e., acid protease and acid phosphatase) participating in soil N and P cycles, while the presence of earthworms ameliorated these inhibitory effects. After the CeO2 NP exposure, the earthworms significantly altered the relative abundance of some microbes associated with the soil N and P cycles (Flavobacterium, Pedobacter, Streptomyces, Bacillus, Bacteroidota, Actinobacteria, and Firmicutes). This was consistent with the pattern found in the significantly changed metabolites which were also involved in the microbial N and P metabolism. Both CeO2 NPs and earthworms changed the soil bacterial community and soil metabolite profiles. Larger alterations of soil bacteria and metabolites were found under CeO2 NP exposure with earthworms. Overall, our study indicates that the top-down control of earthworms can drastically modify the microbial responses to CeO2 NPs from all studied biological aspects. This clearly shows the importance of the holistic consideration of all soil ecological components to assess the environmental risks of NPs to soil health.
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Affiliation(s)
- Wenxing Li
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Peihua Zhang
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Hao Qiu
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Cornelis A M Van Gestel
- Department of Ecological Science, Faculty of Science, Vrije Universiteit, Amsterdam 1081 HV, The Netherlands
| | - Willie J G M Peijnenburg
- Institute of Environmental Sciences, Leiden University, Leiden 2333 CC, The Netherlands
- National Institute of Public Health and the Environment, Center for the Safety of Substances and Products, Bilthoven 3720 BA, The Netherlands
| | - Xinde Cao
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Ling Zhao
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Xiaoyun Xu
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Erkai He
- School of Geographic Sciences, East China Normal University, Shanghai 200241, China
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21
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He G, Shu S, Liu G, Zhang Q, Liu Y, Jiang Y, Liu W. Aquatic macrophytes mitigate the short-term negative effects of silver nanoparticles on denitrification and greenhouse gas emissions in riparian soils. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2022; 293:118611. [PMID: 34861336 DOI: 10.1016/j.envpol.2021.118611] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/19/2021] [Revised: 11/01/2021] [Accepted: 11/29/2021] [Indexed: 06/13/2023]
Abstract
Silver nanoparticles (AgNPs) are increasingly released into the aquatic environments because of their extensive use in consumer products and industrial applications. Some researchers have explored the toxicity of AgNPs to nitrogen (N) and carbon (C) cycles, but little is known about the role of aquatic plants in regulating the impact of AgNPs on these biogeochemical processes and related microorganisms. Here, two 90-day pot experiments were conducted to determine the effect of AgNPs on denitrification rates and greenhouse gas emissions in riparian wetland soils, with or without emergent plants (Typha minima Funck). As a comparison, the toxicity of equal concentration of AgNO3 was also determined. The results showed that AgNPs released a great quantity of free Ag+, most of which was accumulated in soils, while little (less than 2%) was absorbed by plant shoots and roots. Both AgNPs and AgNO3 could increase the soil redox potential and affect the growth and nutrient (N and phosphorus) uptake of plants. In soils with plants, there was no significant difference in denitrification rates and emissions of N2O and CH4 between control and AgNPs or AgNO3 treatments at all tested concentrations (0.5, 1 and 10 mg kg-1). However, low levels of AgNPs (0.5 mg kg-1) significantly enhanced CO2 emission throughout the experiment. Interestingly, in the absence of plants, a high dosage (10 mg kg-1) of AgNPs generally inhibited soil denitrification and stimulated the emissions of CO2, CH4 and N2O in the short-term. Meanwhile, the abundance of key denitrifying genes (nirS and nirK) was significantly increased by exposure to 10 mg kg-1 AgNPs or AgNO3. Our results suggest that emergent plants can alleviate the short-term negative effects of AgNPs on N and C cycling processes in wetland soils through different pathways.
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Affiliation(s)
- Gang He
- CAS Key Laboratory of Aquatic Botany and Watershed Ecology, Chinese Academy of Sciences, Wuhan Botanical Garden, Wuhan, 430074, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Shi Shu
- Wuhan Sino-Sci Ruihua Eco Tech Co., Ltd, Wuhan, 430080, China
| | - Guihua Liu
- CAS Key Laboratory of Aquatic Botany and Watershed Ecology, Chinese Academy of Sciences, Wuhan Botanical Garden, Wuhan, 430074, China; Hubei Key Laboratory of Wetland Evolution and Ecological Restoration, Chinese Academy of Sciences, Wuhan Botanical Garden, Wuhan, 430074, China
| | - Quanfa Zhang
- CAS Key Laboratory of Aquatic Botany and Watershed Ecology, Chinese Academy of Sciences, Wuhan Botanical Garden, Wuhan, 430074, China; Hubei Key Laboratory of Wetland Evolution and Ecological Restoration, Chinese Academy of Sciences, Wuhan Botanical Garden, Wuhan, 430074, China
| | - Yi Liu
- CAS Key Laboratory of Aquatic Botany and Watershed Ecology, Chinese Academy of Sciences, Wuhan Botanical Garden, Wuhan, 430074, China; Hubei Key Laboratory of Wetland Evolution and Ecological Restoration, Chinese Academy of Sciences, Wuhan Botanical Garden, Wuhan, 430074, China
| | - Ying Jiang
- CAS Key Laboratory of Aquatic Botany and Watershed Ecology, Chinese Academy of Sciences, Wuhan Botanical Garden, Wuhan, 430074, China; Hubei Key Laboratory of Wetland Evolution and Ecological Restoration, Chinese Academy of Sciences, Wuhan Botanical Garden, Wuhan, 430074, China
| | - Wenzhi Liu
- CAS Key Laboratory of Aquatic Botany and Watershed Ecology, Chinese Academy of Sciences, Wuhan Botanical Garden, Wuhan, 430074, China; Hubei Key Laboratory of Wetland Evolution and Ecological Restoration, Chinese Academy of Sciences, Wuhan Botanical Garden, Wuhan, 430074, China.
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22
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Zhang X, Dang D, Zheng L, Wu L, Wu Y, Li H, Yu Y. Effect of Ag Nanoparticles on Denitrification and Microbial Community in a Paddy Soil. Front Microbiol 2022; 12:785439. [PMID: 35003016 PMCID: PMC8727482 DOI: 10.3389/fmicb.2021.785439] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2021] [Accepted: 11/23/2021] [Indexed: 11/30/2022] Open
Abstract
The extensive application of Ag nanoparticles (AgNPs) in industry, agriculture, and food processing areas increases the possibility of its release and accumulation to agroecosystem, but the effects of AgNPs to denitrification and the microbial community in paddy ecosystems are still poorly studied. In this study, microcosmic simulation experiments were established to investigate the response of soil denitrification to different levels of AgNPs (i.e., 0.1, 1, 10, and 50 mg/kg) in a paddy soil. Real-time quantitative PCR and high-throughput sequencing were conducted to reveal the microbial mechanism of the nanometer effect. The results showed that, though 0.1–10 mg/kg AgNPs had no significant effects on denitrification rate and N2O emission rate compared to CK and bulk Ag treatments, 50 mg/kg AgNPs significantly stimulated more than 60% increase of denitrification rate and N2O emission rate on the 3rd day (P < 0.05). Real-time quantitative PCR revealed that 50 mg/kg AgNPs significantly decreased the abundance of 16S bacterial rRNA gene, nirS/nirK, cnorB, and nosZ genes, but it did not change the narG gene abundance. The correlation analysis further revealed that the cumulative N2O emission was positively correlated with the ratio of all the five tested denitrifying genes to bacterial 16S rRNA gene (P < 0.05), indicating that the tolerance of narG gene to AgNPs was the key factor of the increase in denitrification in the studied soil. High-throughput sequencing showed that only the 50-mg/kg-AgNP treatment significantly changed the microbial community composition compared to bulk Ag and CK treatments. The response of microbial phylotypes to AgNPs suggested that the most critical bacteria which drove the stimulation of 50 mg/kg AgNPs on N2O emission were Firmicutes and β-proteobacteria, such as Clotridiales, Burkholderiales, and Anaerolineales. This study revealed the effects of AgNPs to denitrification in a paddy ecosystem and could provide a scientific basis for understanding of the environmental and toxicological effects of Ag nanomaterials.
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Affiliation(s)
- Xiao Zhang
- Key Laboratory of Agrometeorology of Jiangsu Province, Nanjing University of Information Science and Technology, Nanjing, China
| | - Di Dang
- Key Laboratory of Agrometeorology of Jiangsu Province, Nanjing University of Information Science and Technology, Nanjing, China
| | - Lingsi Zheng
- Key Laboratory of Agrometeorology of Jiangsu Province, Nanjing University of Information Science and Technology, Nanjing, China
| | - Lingyu Wu
- Key Laboratory of Agrometeorology of Jiangsu Province, Nanjing University of Information Science and Technology, Nanjing, China
| | - Yu Wu
- Key Laboratory of Agrometeorology of Jiangsu Province, Nanjing University of Information Science and Technology, Nanjing, China
| | - Haoruo Li
- Key Laboratory of Agrometeorology of Jiangsu Province, Nanjing University of Information Science and Technology, Nanjing, China
| | - Yongjie Yu
- Key Laboratory of Agrometeorology of Jiangsu Province, Nanjing University of Information Science and Technology, Nanjing, China.,Key Laboratory of Karst Dynamics, MNR and Guangxi, Institute of Karst Geology, Chinese Academy of Geological Sciences, Guilin, China
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23
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Feng L, Xu N, Qu Q, Zhang Z, Ke M, Lu T, Qian H. Synergetic toxicity of silver nanoparticle and glyphosate on wheat (Triticum aestivum L.). THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 797:149200. [PMID: 34303973 DOI: 10.1016/j.scitotenv.2021.149200] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/06/2021] [Revised: 07/17/2021] [Accepted: 07/18/2021] [Indexed: 06/13/2023]
Abstract
Silver nanoparticles (AgNPs) are one of the most commonly used nanomaterials in industrial and agricultural production. Glyphosate is a broad-spectrum systemic herbicide, which mainly acts in the phloem of weeds that compete with crop growth and is widely used in agriculture. This study investigated the interactive effects of AgNPs and glyphosate on the physiological morphology, gene transcription, and rhizosphere microorganisms of wheat. Our results demonstrated that wheat growth, and the structure and diversity of rhizosphere microorganisms were slightly influenced by AgNPs and glyphosate single treatment at the test concentration. However, AgNPs and glyphosate (Gly) combined treatment (AgNPs + Gly) strongly inhibited wheat growth and influenced gene transcription. In total, 955, 601, and 1336 genes were determined to be differentially expressed in AgNPs, glyphosate, and combined treatment, respectively. According to KEGG analysis, the combined groups induced an antioxidant response by upregulating the transcription of phenylpropanoid biosynthesis-related genes. In addition, more energy was needed, and disrupted cell membrane was shown in the combined treatment, which displayed in the upregulation of sucrose, starch, and lipid synthesis. Moreover, the relative abundance of Bradyrhizobium, Devosia, Kribbella, Sphingopyxis (nitrogen-fixing bacteria), and Streptomyces (plant growth-promoting bacteria) in soil microbiota were decreased, implicated that nitrogen fixation and some beneficial substance secretions were inhibited by the combined treatment. This study emphasized that the synergetic effects of AgNPs and glyphosate exerted a negative impact on wheat growth.
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Affiliation(s)
- Lan Feng
- College of Environment, Zhejiang University of Technology, Hangzhou 310032, PR China
| | - Nuohan Xu
- College of Environment, Zhejiang University of Technology, Hangzhou 310032, PR China
| | - Qian Qu
- College of Environment, Zhejiang University of Technology, Hangzhou 310032, PR China
| | - Zhenyan Zhang
- College of Environment, Zhejiang University of Technology, Hangzhou 310032, PR China
| | - Mingjing Ke
- College of Environment, Zhejiang University of Technology, Hangzhou 310032, PR China
| | - Tao Lu
- College of Environment, Zhejiang University of Technology, Hangzhou 310032, PR China
| | - Haifeng Qian
- College of Environment, Zhejiang University of Technology, Hangzhou 310032, PR China.
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24
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Abdulsada Z, Kibbee R, Schwertfeger D, Princz J, DeRosa M, Örmeci B. Fate and removal of silver nanoparticles during sludge conditioning and their impact on soil health after simulated land application. WATER RESEARCH 2021; 206:117757. [PMID: 34715524 DOI: 10.1016/j.watres.2021.117757] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/24/2021] [Revised: 10/07/2021] [Accepted: 10/10/2021] [Indexed: 06/13/2023]
Abstract
The growing use of silver nanoparticles (AgNPs) in personal care products and clothing has increased their concentrations in wastewater and subsequently in sludge raising concerns about their fate and toxicity during wastewater treatment and after land application of sludge. This research investigated the fate and removal of AgNPs during chemical conditioning of anaerobically digested sludge and their impact on soil bacteria and health after land application. Ferric chloride (FeCl3), alum (Al2 (SO4)3 • (14-18) H2O), and synthetic (polyacrylamide) polymer were used for sludge conditioning. All conditioners effectively removed AgNPs from the liquid phase and concentrated them in sludge solids. Concentration analyses showed that out of 53.0 mg/L of silver in the sludge, only 0.1 to 0.003 mg/L of silver remained in the sludge supernatant after conditioning and 12 to 20% of this value were particulates. Morphological analyses also showed that AgNPs went through physical, chemical, and morphological changes in sludge that were not observed in nanopure water and the resulting floc structures and the incorporation of nanoparticles were different for each conditioner. The impact of conditioned AgNPs on the biological activities of soil was evaluated by investigating its impact on the presence of five important phyla (Acidobacteria, Actinobacteria, Bacteroidetes, Firmicutes and Proteobacteria). The results showed that AgNPs at a concentration of 20 mg AgNPs/g soil had a minimal impact on the presence and diversity of the assessed phyla. Also, using different chemicals for sludge conditioning resulted in different growth behavior of studied phyla. This study provides new insight into how the presence of AgNPs and different chemicals used for sludge conditioning might impact the soil biological activities and hence plant growth. The study also provides a solid basis for further research in the risk assessment of nanoparticle toxicity in biosolids amended soils.
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Affiliation(s)
- Zainab Abdulsada
- Department of Civil and Environmental Engineering, Carleton University, 1125 Colonel by Drive, Ottawa, ON K1S 5B6, Canada; Department of Environmental Engineering, University of Baghdad, Karrada, Al-Jadriya, Baghdad, Iraq (present address)
| | - Richard Kibbee
- Department of Civil and Environmental Engineering, Carleton University, 1125 Colonel by Drive, Ottawa, ON K1S 5B6, Canada
| | - Dina Schwertfeger
- Environment and Climate Change Canada, 335 River Road, Ottawa, ON K1V 1C7, Canada
| | - Juliska Princz
- Environment and Climate Change Canada, 335 River Road, Ottawa, ON K1V 1C7, Canada
| | - Maria DeRosa
- Department of Chemistry, Carleton University, 1125 Colonel by Drive, Ottawa, ON K1S 5B6, Canada
| | - Banu Örmeci
- Department of Civil and Environmental Engineering, Carleton University, 1125 Colonel by Drive, Ottawa, ON K1S 5B6, Canada.
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25
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Feng G, Huang H, Chen Y. Effects of emerging pollutants on the occurrence and transfer of antibiotic resistance genes: A review. JOURNAL OF HAZARDOUS MATERIALS 2021; 420:126602. [PMID: 34273886 DOI: 10.1016/j.jhazmat.2021.126602] [Citation(s) in RCA: 72] [Impact Index Per Article: 24.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/08/2021] [Revised: 07/05/2021] [Accepted: 07/05/2021] [Indexed: 06/13/2023]
Abstract
The emergence and spread of antibiotic resistance genes (ARGs) have become major concerns for both public health and environmental ecosystems. Emerging pollutants (EPs) that accumulate in environmental compartments also pose a potential risk for the enrichment of ARGs in indigenous microorganisms. This paper presents a comprehensive review of the effects and intrinsic mechanisms of EPs, including microplastics, engineered nanomaterials, disinfection byproducts, pharmaceuticals, and personal care products, on the occurrence and dissemination of ARGs. State-of-the-art methods for identifying culture-independent ARG-host interactions and monitoring horizontal gene transfer (HGT) processes in real-time are first reviewed. The contributions of EPs to the abundance and diversity of ARGs are then summarized. Finally, we discussed the underlying mechanisms related to the regulation of HGT, increased mutagenesis, and the evolution of microbial communities. Further details of three HGT (i.e., conjugation, transformation, and transduction) frequency patterns in response to various EPs are also examined. This review contemplates and reassesses the risks of ARG evolution posed by the manufacture and application of EPs.
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Affiliation(s)
- Guanqun Feng
- State Key Laboratory of Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Tongji University, 1239 Siping Road, Shanghai 200092, China
| | - Haining Huang
- State Key Laboratory of Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Tongji University, 1239 Siping Road, Shanghai 200092, China; Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, China.
| | - Yinguang Chen
- State Key Laboratory of Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Tongji University, 1239 Siping Road, Shanghai 200092, China; Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, China.
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26
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Ihtisham M, Noori A, Yadav S, Sarraf M, Kumari P, Brestic M, Imran M, Jiang F, Yan X, Rastogi A. Silver Nanoparticle's Toxicological Effects and Phytoremediation. NANOMATERIALS 2021; 11:nano11092164. [PMID: 34578480 PMCID: PMC8465113 DOI: 10.3390/nano11092164] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/27/2021] [Revised: 08/05/2021] [Accepted: 08/19/2021] [Indexed: 11/17/2022]
Abstract
The advancement in nanotechnology has brought numerous benefits for humans in diverse areas including industry, medicine, and agriculture. The demand in the application of nanomaterials can result in the release of these anthropogenic materials into soil and water that can potentially harm the environment by affecting water and soil properties (e.g., soil texture, pH, organic matter, and water content), plants, animals, and subsequently human health. The properties of nanoparticles including their size, surface area, and reactivity affect their fate in the environment and can potentially result in their toxicological effects in the ecosystem and on living organisms. There is extensive research on the application of nano-based materials and the consequences of their release into the environment. However, there is little information about environmentally friendly approaches for removing nanomaterials from the environment. This article provides insight into the application of silver nanoparticles (AgNPs), as one of the most commonly used nanomaterials, their toxicological effects, their impacts on plants and microorganisms, and briefly reviews the possibility of remediation of these metabolites using phytotechnology approaches. This article provides invaluable information to better understand the fate of nanomaterials in the environment and strategies in removing them from the environment.
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Affiliation(s)
- Muhammad Ihtisham
- College of Landscape Architecture, Sichuan Agricultural University, Chengdu 611130, China; (M.I.); (F.J.)
| | - Azam Noori
- Department of Biology, Merrimack College, North Andover, MA 01845, USA;
| | - Saurabh Yadav
- Department of Biotechnology, Hemvati Nandan Bahuguna Garhwal (Central) University, Garhwal, Srinagar 246174, Uttarakhand, India;
| | - Mohammad Sarraf
- Department of Horticulture Science, Shiraz Branch, Islamic Azad University, Shiraz 71987-74731, Iran;
| | - Pragati Kumari
- Scientist Hostel-S-02, Chauras Campus, Garhwal, Srinagar 246174, Uttarakhand, India;
| | - Marian Brestic
- Department of Plant Physiology, Slovak University of Agriculture, A. Hlinku 2, 94976 Nitra, Slovakia;
- Department of Botany and Plant Physiology, Faculty of Agrobiology, Food and Natural Resources, Czech University of Life Sciences Prague, 16500 Prague, Czech Republic
| | - Muhammad Imran
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, College of Agriculture, South China Agricultural University, Guangzhou 510642, China;
| | - Fuxing Jiang
- College of Landscape Architecture, Sichuan Agricultural University, Chengdu 611130, China; (M.I.); (F.J.)
| | - Xiaojun Yan
- College of Landscape Architecture, Sichuan Agricultural University, Chengdu 611130, China; (M.I.); (F.J.)
- Correspondence: (X.Y.); (A.R.)
| | - Anshu Rastogi
- Laboratory of Bioclimatology, Department of Ecology and Environmental Protection, Poznan University of Life Sciences, Piątkowska 94, 60-649 Poznan, Poland
- Faculty of Geo-Information Science and Earth Observation (ITC), University of Twente, 7500 AE Enschede, The Netherlands
- Correspondence: (X.Y.); (A.R.)
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27
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Peñalver-Alcalá A, Álvarez-Rogel J, Conesa HM, González-Alcaraz MN. Biochar and urban solid refuse ameliorate the inhospitality of acidic mine tailings and foster effective spontaneous plant colonization under semiarid climate. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2021; 292:112824. [PMID: 34033987 DOI: 10.1016/j.jenvman.2021.112824] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/01/2021] [Revised: 04/30/2021] [Accepted: 05/17/2021] [Indexed: 06/12/2023]
Abstract
Phytomanagement is considered a suitable option in line with nature-based solutions to reduce environmental risks associated to metal(loid) mine tailings. We aimed at assessing the effectiveness of biochar from pruning trees combined with compost from urban solid refuse (USR) to ameliorate the conditions of barren acidic (pH ~5.5) metal(loid) mine tailing soils (total concentrations in mg kg-1: As ~220, Cd ~40, Mn ~1800, Pb ~5300 and Zn ~8600) from Mediterranean semiarid areas and promote spontaneous plant colonization. Two months after amendment addition were enough to observe improvements in chemical and physico-chemical tailing soil properties (reduced acidity, salinity and water-soluble metals and increased organic carbon and nutrients content), which resulted in lowered ecotoxicity for the soil invertebrate Enchytraeus crypticus. Recalcitrant organic carbon provided by biochar remained in soil whereas labile organic compounds provided by USR were consumed over time. These improvements were consistent for at least one year and led to lower bulk density, higher water retention capacity and higher scores for microbial/functional-related parameters in the amended tailing soil. Spontaneous growth of native vegetation was favored with amendment addition, but adult plants of remarkable size were only found after three years. This highlights the existence of a time-lag between the positive effects of the amendment on tailing soil properties being observed and these improvements being translated into effective spontaneous plant colonization.
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Affiliation(s)
- Antonio Peñalver-Alcalá
- Department of Agricultural Engineering of the E.T.S.I.A. & Soil Ecology and Biotechnology Unit of the Institute of Plant Biotechnology, Technical University of Cartagena, 30203, Cartagena, Spain
| | - José Álvarez-Rogel
- Department of Agricultural Engineering of the E.T.S.I.A. & Soil Ecology and Biotechnology Unit of the Institute of Plant Biotechnology, Technical University of Cartagena, 30203, Cartagena, Spain
| | - Héctor M Conesa
- Department of Agricultural Engineering of the E.T.S.I.A. & Soil Ecology and Biotechnology Unit of the Institute of Plant Biotechnology, Technical University of Cartagena, 30203, Cartagena, Spain
| | - M Nazaret González-Alcaraz
- Department of Agricultural Engineering of the E.T.S.I.A. & Soil Ecology and Biotechnology Unit of the Institute of Plant Biotechnology, Technical University of Cartagena, 30203, Cartagena, Spain; Department of Biology & CESAM, University of Aveiro, 3810-193, Aveiro, Portugal.
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28
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Wu S, Gaillard JF, Gray KA. The impacts of metal-based engineered nanomaterial mixtures on microbial systems: A review. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 780:146496. [PMID: 34030287 DOI: 10.1016/j.scitotenv.2021.146496] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/28/2020] [Revised: 02/23/2021] [Accepted: 03/11/2021] [Indexed: 05/24/2023]
Abstract
The last decade has witnessed tremendous growth in the commercial use of metal-based engineered nanomaterials (ENMs) for a wide range of products and processes. Consequently, direct and indirect release into environmental systems may no longer be considered negligible or insignificant. Yet, there is an active debate as to whether there are real risks to human or ecological health with environmental exposure to ENMs. Previous research has focused primarily on the acute effects of individual ENMs using pure cultures under controlled laboratory environments, which may not accurately reveal the ecological impacts of ENMs under real environmental conditions. The goal of this review is to assess our current understanding of ENM effects as we move from exposure of single to multiple ENMs or microbial species. For instance, are ENMs' impacts on microbial communities predicted by their intrinsic physical or chemical characteristics or their effects on single microbial populations; how do chronic ENM interactions compare to acute toxicity; does behavior under simplified laboratory conditions reflect that in environmental media; finally, is biological stress modified by interactions in ENM mixtures relative to that of individual ENM? This review summarizes key findings and our evolving understanding of the ecological effects of ENMs under complex environmental conditions on microbial systems, identifies the gaps in our current knowledge, and indicates the direction of future research.
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Affiliation(s)
- Shushan Wu
- Department of Civil and Environmental Engineering, Northwestern University, USA.
| | | | - Kimberly A Gray
- Department of Civil and Environmental Engineering, Northwestern University, USA.
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29
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Cao C, Huang J, Yan CN, Zhang XX, Ma YX. Impacts of Ag and Ag 2S nanoparticles on the nitrogen removal within vertical flow constructed wetlands treating secondary effluent. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 777:145171. [PMID: 33676207 DOI: 10.1016/j.scitotenv.2021.145171] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/29/2020] [Revised: 12/29/2020] [Accepted: 01/10/2021] [Indexed: 06/12/2023]
Abstract
In this study, the effects of silver (Ag NPs) and sliver sulfide nanoparticles (Ag2S NPs) on nitrogen removal and nitrogen functional microbes in constructed wetlands were investigated. The obtained results demonstrated that inhibition extent on nitrogen removal relied on NPs types and high concentrations NPs showed higher negative effects. 0.5 mg/L Ag NPs had no influence on NH4+-N removal, amoA and nxrA gene copies, whereas Ag2S NPs and Ag+ decreased NH4+-N removal by reducing abundances of nitrifying genes. The concentrations of NO3--N and TN in all 0.5 mg/L obviously increased compared with control, resulting from decreasing functional genes and denitrifying bacteria. And 0.5 mg/L Ag NPs exhibited largest inhibitory effects, with the highest NO3--N effluent concentrations. 2 mg/L Ag NPs decreased NH4+-N removal, but adverse effects gradually vanished with extension of time, whereas both Ag2S NPs and Ag+ at 2 mg/L influenced NH4+-N transformation and decreased the abundance of amoA and nxrA genes and the AOB Nitrosomonas in CWs. Moreover, 2 mg/L of Ag NPs reduced NO3--N removal by decreasing abundance of nirS and key denitrifying bacteria. To sum up, the inhibition mechanisms concluded from current results were possibly in that Ag NPs exhibited nanotoxicity rather than ionic toxicity.
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Affiliation(s)
- Chong Cao
- Department of Municipal Engineering, School of Civil Engineering, Southeast University, Nanjing 211189, China
| | - Juan Huang
- Department of Municipal Engineering, School of Civil Engineering, Southeast University, Nanjing 211189, China.
| | - Chun-Ni Yan
- Department of Municipal Engineering, School of Civil Engineering, Southeast University, Nanjing 211189, China
| | - Xin-Xin Zhang
- Department of Municipal Engineering, School of Civil Engineering, Southeast University, Nanjing 211189, China
| | - Yi-Xuan Ma
- Department of Municipal Engineering, School of Civil Engineering, Southeast University, Nanjing 211189, China
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30
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Courtois P, Rorat A, Lemiere S, Guyoneaud R, Attard E, Longepierre M, Rigal F, Levard C, Chaurand P, Grosser A, Grobelak A, Kacprzak M, Lors C, Richaume A, Vandenbulcke F. Medium-term effects of Ag supplied directly or via sewage sludge to an agricultural soil on Eisenia fetida earthworm and soil microbial communities. CHEMOSPHERE 2021; 269:128761. [PMID: 33168285 DOI: 10.1016/j.chemosphere.2020.128761] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/10/2020] [Revised: 10/22/2020] [Accepted: 10/25/2020] [Indexed: 06/11/2023]
Abstract
The widespread use of silver nanoparticles (AgNPs) in consumer products that release Ag throughout their life cycle has raised potential environmental concerns. AgNPs primarily accumulate in soil through the spreading of sewage sludge (SS). In this study, the effects of direct exposure to AgNPs or indirect exposure via SS contaminated with AgNPs on the earthworm Eisenia fetida and soil microbial communities were compared, through 3 scenarios offering increasing exposure concentrations. The effects of Ag speciation were analyzed by spiking SS with AgNPs or AgNO3 before application to soil. SS treatment strongly impacted Ag speciation due to the formation of Ag2S species that remained sulfided after mixing in the soil. The life traits and expression of lysenin, superoxide dismutase, cd-metallothionein genes in earthworms were not impacted by Ag after 5 weeks of exposure, but direct exposure to Ag without SS led to bioaccumulation of Ag, suggesting transfer in the food chain. Ag exposure led to a decrease in potential carbon respiration only when directly added to the soil. The addition of SS had a greater effect on soil microbial diversity than the form of Ag, and the formation of Ag sulfides in SS reduced the impact of AgNPs on E. fetida and soil microorganisms compared with direct addition.
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Affiliation(s)
- Pauline Courtois
- Univ. Lille, IMT Lille Douai, Univ. Artois, Yncrea Hauts-de-France, ULR4515 - LGCgE, Laboratoire de Génie Civil et Géo-Environnement, F-59000, Lille, France.
| | - Agnieszka Rorat
- Univ. Lille, IMT Lille Douai, Univ. Artois, Yncrea Hauts-de-France, ULR4515 - LGCgE, Laboratoire de Génie Civil et Géo-Environnement, F-59000, Lille, France
| | - Sébastien Lemiere
- Univ. Lille, IMT Lille Douai, Univ. Artois, Yncrea Hauts-de-France, ULR4515 - LGCgE, Laboratoire de Génie Civil et Géo-Environnement, F-59000, Lille, France
| | - Rémy Guyoneaud
- Université de Pau et des Pays de L'Adour, E2S UPPA, CNRS, UMR IPREM 5254, Environmental Microbiology, 64000, Pau, France
| | - Eléonore Attard
- Université de Pau et des Pays de L'Adour, E2S UPPA, CNRS, UMR IPREM 5254, Environmental Microbiology, 64000, Pau, France
| | - Manon Longepierre
- Université de Pau et des Pays de L'Adour, E2S UPPA, CNRS, UMR IPREM 5254, Environmental Microbiology, 64000, Pau, France
| | - François Rigal
- Azorean Biodiversity Group, Centre for Ecology, Evolution and Environmental Changes (CE3C), Departamento de Ciencias Agráriase Engenharia Do Ambiente, Universidade Dos Açores, PT-9700-042, Angra Do Heroísmo, Açores, Portugal
| | - Clément Levard
- Aix Marseille Univ, CNRS, IRD, INRAE, Coll France, CEREGE, Aix-en-Provence, France
| | - Perrine Chaurand
- Aix Marseille Univ, CNRS, IRD, INRAE, Coll France, CEREGE, Aix-en-Provence, France
| | - Anna Grosser
- Częstochowa University of Technology, Faculty of Infrastructure and Environment, Czestochowa, Poland
| | - Anna Grobelak
- Częstochowa University of Technology, Faculty of Infrastructure and Environment, Czestochowa, Poland
| | - Malgorzata Kacprzak
- Częstochowa University of Technology, Faculty of Infrastructure and Environment, Czestochowa, Poland
| | - Christine Lors
- Univ. Lille, IMT Lille Douai, Univ. Artois, Yncrea Hauts-de-France, ULR4515 - LGCgE, Laboratoire de Génie Civil et Géo-Environnement, F-59000, Lille, France
| | - Agnès Richaume
- LEM, Laboratoire D'Ecologie Microbienne, UMR 5557, 69622, Villeurbanne, France
| | - Franck Vandenbulcke
- Univ. Lille, IMT Lille Douai, Univ. Artois, Yncrea Hauts-de-France, ULR4515 - LGCgE, Laboratoire de Génie Civil et Géo-Environnement, F-59000, Lille, France
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Samarajeewa AD, Velicogna JR, Schwertfeger DM, Princz JI, Subasinghe RM, Scroggins RP, Beaudette LA. Ecotoxicological effects of copper oxide nanoparticles (nCuO) on the soil microbial community in a biosolids-amended soil. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 763:143037. [PMID: 33168240 DOI: 10.1016/j.scitotenv.2020.143037] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/04/2020] [Revised: 10/09/2020] [Accepted: 10/10/2020] [Indexed: 06/11/2023]
Abstract
This study represents a holistic approach in assessing the effects of copper oxide nanoparticles (nCuO) on microbial health and community structure in soil amended with municipal biosolids. The biosolids were amended with nCuO (<50 nm) and mixed into a sandy loam soil at measured Cu concentrations of 27, 54, 123, 265 and 627 mg Cu kg-1 soil. A suite of tests were used to assess the potential impact of nCuO on microbial growth, activity, and diversity. Microbial growth was determined by the heterotrophic plate count (HPC) method, while microbial diversity was assessed using both community level physiological profiling (CLPP) and 16S ribosomal DNA (rDNA) sequencing. Microbial activity was assessed by examining soil nitrification, organic matter decomposition, soil respiration (basal and substrate induced) and soil enzyme assays for dehydrogenase, phosphatase and β-glucosidase activities. As a readily soluble positive control, copper sulfate (CuSO4) was used at measured Cu concentrations of 65, 140, 335 and 885 mg Cu kg-1 soil for select tests, and at the highest concentration for the remaining tests. Analysis on Cu bioavailability revealed that extractable Cu2+ was higher in CuSO4-spiked soils than nCuO-spiked soils. At a nCuO exposure concentration of ≤265 mg Cu kg-1 soil, stimulatory effects were observed in nitrification, β-glucosidase and community level physiological profiling (CLPP) tests. nCuO showed no significant inhibitory effects on the soil microbial growth, activity or diversity at the highest concentration (i.e. 627 mg Cu kg-1 soil), with the exception of the dehydrogenase (i.e. ≥27 mg Cu kg-1 soil) and phosphatase (i.e. 627 mg Cu kg-1 soil) enzyme activities. In contrast, inhibition from CuSO4 at 885 mg Cu kg-1 soil was observed in all tests with the exception of β-glucosidase enzyme activity. The growth of a Cu tolerant bacterium, Rhodanobacter sp., was observed at 885 mg Cu kg-1 soil (CuSO4).
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Affiliation(s)
- A D Samarajeewa
- Biological Assessment and Standardization Section, Environment and Climate Change Canada, 335 River Road, Ottawa, Ontario K1V 1C7, Canada.
| | - J R Velicogna
- Biological Assessment and Standardization Section, Environment and Climate Change Canada, 335 River Road, Ottawa, Ontario K1V 1C7, Canada
| | - D M Schwertfeger
- Biological Assessment and Standardization Section, Environment and Climate Change Canada, 335 River Road, Ottawa, Ontario K1V 1C7, Canada
| | - J I Princz
- Biological Assessment and Standardization Section, Environment and Climate Change Canada, 335 River Road, Ottawa, Ontario K1V 1C7, Canada
| | - R M Subasinghe
- Biological Assessment and Standardization Section, Environment and Climate Change Canada, 335 River Road, Ottawa, Ontario K1V 1C7, Canada
| | - R P Scroggins
- Biological Assessment and Standardization Section, Environment and Climate Change Canada, 335 River Road, Ottawa, Ontario K1V 1C7, Canada
| | - L A Beaudette
- Biological Assessment and Standardization Section, Environment and Climate Change Canada, 335 River Road, Ottawa, Ontario K1V 1C7, Canada
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Bao S, Xu J, Tang W, Fang T. Effect and mechanism of silver nanoparticles on nitrogen transformation in water-sediment system of a hypereutrophic lake. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 761:144182. [PMID: 33360547 DOI: 10.1016/j.scitotenv.2020.144182] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/22/2020] [Revised: 11/24/2020] [Accepted: 11/24/2020] [Indexed: 06/12/2023]
Abstract
Industrialization and urbanization are expected to increase the release of silver nanoparticles (AgNPs) into aquatic ecosystems. However, it remains to be determined how AgNPs influence nitrogen transformation and the underlying mechanism in natural water bodies. Here, the impact of AgNPs on nitrogen cycling in water-sediment system of a hypereutrophic lake was studied and the mechanism of nitrogen transformation was investigated in terms of the nitrogen functional enzymes and genes. Following 7 days of water-sediment microcosm experiments, the levels of total nitroten (TN) and organic nitrogen (OrgN) were significantly increased by 50 mg/L Ag+ treatment when compared with the non-Ag control (P < 0.05). In contrast, the levels of TN and Org-N were both slightly decreased by AgNPs treatments (0.5 and 50 mg/L). Additionally, the levels of NO3--N were evidently reduced with the presence of AgNPs (P < 0.05). Further, our data proved that enzymes and those enzyme encoding genes involved in the nitrogen transformation may directly responsible for the alterations of nitrogen transformation. Overall, our work suggested that the short-term exposure to AgNPs might cause hormetic effects on nitrogen-transforming microorganisms in hypereutrophic lakes, and have a potential to result in non-negligible changes in the nitrogen cycling of hypereutrophic lakes.
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Affiliation(s)
- Shaopan Bao
- Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China
| | - Jian Xu
- Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Wei Tang
- Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China
| | - Tao Fang
- Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China; University of Chinese Academy of Sciences, Beijing 100049, China.
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Haruna A, Yahaya SM. Recent Advances in the Chemistry of Bioactive Compounds from Plants and Soil Microbes: a Review. CHEMISTRY AFRICA 2021. [PMCID: PMC7869076 DOI: 10.1007/s42250-020-00213-9] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Bioactive compounds derived from plants and microbial sources are required for the survival of the human race and groundbreaking research must continue in this line. Plants and microbes are the major sources of naturally occurring bioactive compounds for numerous biotechnological applications. Recent progress in the fields of bioactive compounds and soil chemistry in agriculture has since given man a lead to the discovery of potent drugs that combat both human and plant diseases. The soil provides the medium for the growth of medicinal plants, but its contamination greatly affects the quality of drugs, food crops, and other essential elements present in the plants which give strength to the body. This area has attracted the attention of scientists and the drug industry toward developing more potent drugs from medicinal plants grown in different soil. The studies of the effect of various parameters and the properties of soil such as; effect of heavy metals, pH, soil organic matter, and phytoremediation process have given a measure of some quality dependence of the soil producing secondary metabolites and soil containing microbes. The information provided will be useful in determine the action of microbes and their interaction with the soil and all true plants producing drugs. Some active compounds in plants and microbes, their properties, and applications have been described in this review. The soil microbes, activities and their interactions, effects of soil particle size, dispersibility and stability of microbes in the soil, and the future outlook for the development of novel active compounds have been reported.
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Peixoto S, Henriques I, Loureiro S. Long-term effects of Cu(OH) 2 nanopesticide exposure on soil microbial communities. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2021; 269:116113. [PMID: 33261963 DOI: 10.1016/j.envpol.2020.116113] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/28/2020] [Revised: 11/15/2020] [Accepted: 11/16/2020] [Indexed: 06/12/2023]
Abstract
Copper-based (nano)pesticides in agroecosystems may result in unintended consequences on non-target soil microbial communities, due to their antimicrobial broad spectrum. We studied the impact of a commercial Cu(OH)2-nanopesticide, over 90 days, at single and season agricultural application doses, in the presence and absence of an edaphic organism (the isopod Porcellionides pruinosus), on microbial communities' function, structure and abundance. Results were compared to the effects of Cu(OH)2-ionic. The nanopesticide application resulted in significant changes on both bacterial and fungal communities' structure, particularly at the season application. The exposed bacterial community presented a significantly lower richness, and higher diversity and evenness while the exposed fungal community presented lower diversity and richness. At the functional level, a significant increase on microbial ability of carbon utilization and a significant decrease on the β-glucosidase activity was observed for communities exposed to the nanopesticide. Regarding Cu forms, less pronounced effects were observed in soils spiked with Cu(OH)2-ionic, which might result from lower Cu concentration in porewater. The presence of P. pruinosus did not induce significant changes in diversity indexes (fungal community) and community-level physiological profiling, suggesting an attenuation of the nanopesticide effect. This study revealed that Cu(OH)2-nanopesticide, at doses applied in agriculture, impact the soil microbial community, possibly affecting its ecological role. On the other hand, invertebrates may attenuate this effect, highlighting the importance of jointly including different interacting communities in the risk assessment of nanopesticides in soils.
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Affiliation(s)
- Sara Peixoto
- CESAM-Centre for Environmental and Marine Studies, University of Aveiro, Campus Universitário de Santiago, 3810-193, Aveiro, Portugal; Department of Biology, University of Aveiro, Campus Universitário de Santiago, 3810-193, Aveiro, Portugal
| | - Isabel Henriques
- CESAM-Centre for Environmental and Marine Studies, University of Aveiro, Campus Universitário de Santiago, 3810-193, Aveiro, Portugal; University of Coimbra, Department of Life Sciences, Faculty of Science and Technology, Calçada Martim de Freitas, 3000-456, Coimbra, Portugal.
| | - Susana Loureiro
- CESAM-Centre for Environmental and Marine Studies, University of Aveiro, Campus Universitário de Santiago, 3810-193, Aveiro, Portugal; Department of Biology, University of Aveiro, Campus Universitário de Santiago, 3810-193, Aveiro, Portugal
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Cao C, Huang J, Yan CN, Ma YX, Xiao J, Zhang XX. Comparative analysis of upward and downward vertical flow constructed wetlands on the nitrogen removal and functional microbes treating wastewater containing Ag nanoparticles. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2021; 278:111573. [PMID: 33137687 DOI: 10.1016/j.jenvman.2020.111573] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/27/2020] [Revised: 10/23/2020] [Accepted: 10/24/2020] [Indexed: 06/11/2023]
Abstract
This study investigated impacts of silver nanoparticles (AgNPs) on nitrogen removal within constructed wetlands (CWs) with different flow directions. The obtained results showed that addition of AgNPs at 0.5 and 2 mg/L significantly inhibited NH4+-N removal, resulting from lower abundances of functional genes (amoA and nxrA) within CWs. And higher abundances of amoA and nxrA genes at 0.5 mg/L were observed in downward flow CW, leading to better NH4+-N removal, compared to upward flow CW. Besides, nitrifying genes amoA and nxrA in upward flow CW at 2.0 mg/L exhibited higher than downward flow CW, explaining better NH4+-N removal in upward flow CW. 0.5 mg/L AgNPs significantly declined NO3--N and TN removal, resulted from decreasing abundances of nirK, nirS and nosZ. In contrast, abundances of nirK, nirS and nosZ genes had slightly lower or higher than before adding AgNPs in upward flow CW, leading to lower NO3--N and TN effluent concentrations. High throughput sequencing also indicated the changes of functional bacterial community after exposing to AgNPs.
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Affiliation(s)
- Chong Cao
- Dept. of Municipal Engineering, School of Civil Engineering, Southeast University, No. 2 Southeast University Road, Nanjing, Jiangsu Province, 211189, China
| | - Juan Huang
- Dept. of Municipal Engineering, School of Civil Engineering, Southeast University, No. 2 Southeast University Road, Nanjing, Jiangsu Province, 211189, China.
| | - Chun-Ni Yan
- Dept. of Municipal Engineering, School of Civil Engineering, Southeast University, No. 2 Southeast University Road, Nanjing, Jiangsu Province, 211189, China
| | - Yi-Xuan Ma
- Dept. of Municipal Engineering, School of Civil Engineering, Southeast University, No. 2 Southeast University Road, Nanjing, Jiangsu Province, 211189, China
| | - Jun Xiao
- Dept. of Municipal Engineering, School of Civil Engineering, Southeast University, No. 2 Southeast University Road, Nanjing, Jiangsu Province, 211189, China
| | - Xin-Xin Zhang
- Dept. of Municipal Engineering, School of Civil Engineering, Southeast University, No. 2 Southeast University Road, Nanjing, Jiangsu Province, 211189, China
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Pérez-Hernández H, Pérez-Moreno A, Sarabia-Castillo CR, García-Mayagoitia S, Medina-Pérez G, López-Valdez F, Campos-Montiel RG, Jayanta-Kumar P, Fernández-Luqueño F. Ecological Drawbacks of Nanomaterials Produced on an Industrial Scale: Collateral Effect on Human and Environmental Health. WATER, AIR, AND SOIL POLLUTION 2021; 232:435. [PMID: 34658457 PMCID: PMC8507508 DOI: 10.1007/s11270-021-05370-2] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/05/2021] [Accepted: 09/28/2021] [Indexed: 05/07/2023]
Abstract
Currently, hundreds of different nanomaterials with a broad application in products that make daily lives a little bit easier, in every aspect, are being produced on an industrial scale at thousands of tons per year. However, several scientists, researchers, politics, and ordinary citizens have stated their concern regarding the life cycle, collateral effects, and final disposal of these cutting-edge materials. This review summarizes, describes, and discusses all manuscripts published in the Journal Citation Reports during the last 10 years, which studied the toxicity or the effects of nanomaterials on human and environmental health. It was observed that 23.62% of the manuscripts analyzed found no ecological or human risks; 54.39% showed that several nanomaterials have toxicological effects on the ecosystems, human, or environmental health. In comparison, only 21.97% stated the nanomaterials had a beneficial impact on those. Although only 54.39% of the manuscripts reported unfavorable effects of nanomaterials on ecosystems, human, or environmental health, it is relevant because the potential damage is invaluable. Therefore, it is imperative to make toxicological studies of nanomaterials with holistic focus under strictly controlled real conditions before their commercialization, to deliver to the market only innocuous and environmentally friendly products.
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Affiliation(s)
- H. Pérez-Hernández
- El Colegio de la Frontera Sur, Agroecología, Unidad Campeche, 24500 Campeche, Mexico
| | - A. Pérez-Moreno
- Sustainability of Natural Resources and Energy Programs, Cinvestav-Saltillo, 25900 Coahuila, Mexico
| | - C. R. Sarabia-Castillo
- Sustainability of Natural Resources and Energy Programs, Cinvestav-Saltillo, 25900 Coahuila, Mexico
| | - S. García-Mayagoitia
- Sustainability of Natural Resources and Energy Programs, Cinvestav-Saltillo, 25900 Coahuila, Mexico
| | - G. Medina-Pérez
- Instituto de Ciencias Agropecuarias, Universidad Autónoma del Estado de Hidalgo, Tulancingo, Hidalgo C. P. 43000 México
| | - F. López-Valdez
- Agricultural Biotechnology Group, Research Center for Applied Biotechnology (CIBA), Instituto Politécnico Nacional, 90700 Tlaxcala, Mexico
| | - R. G. Campos-Montiel
- Instituto de Ciencias Agropecuarias, Universidad Autónoma del Estado de Hidalgo, Tulancingo, Hidalgo C. P. 43000 México
| | - P. Jayanta-Kumar
- Research Institute of Biotechnology & Medical Converged Science, Dongguk University-Seoul, Goyang, 10326 Republic of Korea
| | - F. Fernández-Luqueño
- Sustainability of Natural Resources and Energy Programs, Cinvestav-Saltillo, 25900 Coahuila, Mexico
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Abdulsada Z, Kibbee R, Örmeci B, DeRosa M, Princz J. Impact of anaerobically digested silver and copper oxide nanoparticles in biosolids on soil characteristics and bacterial community. CHEMOSPHERE 2021; 263:128173. [PMID: 33297141 DOI: 10.1016/j.chemosphere.2020.128173] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/24/2020] [Revised: 08/24/2020] [Accepted: 08/26/2020] [Indexed: 06/12/2023]
Abstract
This study investigated whether 2 and 30 mg AgNPs or CuONPs/g TS present in treated sludge (biosolids) may impact the soil health by monitoring the soil characteristics and soil bacterial community for 105 days after the application of biosolids. AgNPs or CuONPs/g TS were first anaerobically digested with mixed primary and secondary sludge rather than adding pristine nanoparticles to biosolids directly. Both environmentally relevant (under the USEPA ceiling concentration limits) and high concentrations of AgNPs and CuONPs were tested. Soil tests included TOC, TN, TP, pH, cell viability and heterotrophic plate counts (HPC). Metagenomic data was generated by high-throughput sequencing of the 16S rRNA gene to explore bacterial populations and diversity. AgNPs and CuONPs at 2 and 30 mg NPs/g TS of sludge could impact soil health factors such as bacterial diversity, community structure, and the population of plant growth-promoting rhizobacteria (PGPR). The population of the highly abundant bacteria that have important physiological roles in soil decreased, while the less important bacteria for soil function were able to thrive. CuONPs exhibited a higher level of toxicity than the AgNPs at both phylum and genus taxonomic levels, and the HPC decreased with higher concentrations of AgNPs and CuONPs. Initially, most of the studied phyla abundance was affected, but the control and other reactors approached similar levels by the end of the experiments, which may be explained by the decrease in toxicity due to the transformation of nanoparticles and the defence mechanisms of bacteria, and indicates the need for long-term field studies.
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Affiliation(s)
- Zainab Abdulsada
- Department of Civil and Environmental Engineering, Carleton University, 1125 Colonel by Drive, Ottawa, ON K1S 5B6, Canada
| | - Richard Kibbee
- Department of Civil and Environmental Engineering, Carleton University, 1125 Colonel by Drive, Ottawa, ON K1S 5B6, Canada
| | - Banu Örmeci
- Department of Civil and Environmental Engineering, Carleton University, 1125 Colonel by Drive, Ottawa, ON K1S 5B6, Canada.
| | - Maria DeRosa
- Department of Chemistry, Carleton University, 1125 Colonel by Drive, Ottawa, ON K1S 5B6, Canada
| | - Juliska Princz
- Environment and Climate Change Canada, 335 River Road South, Ottawa, ON K1V 1C7, Canada
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Peixoto S, Khodaparast Z, Cornelis G, Lahive E, Green Etxabe A, Baccaro M, Papadiamantis AG, Gonçalves SF, Lynch I, Busquets-Fite M, Puntes V, Loureiro S, Henriques I. Impact of Ag 2S NPs on soil bacterial community - A terrestrial mesocosm approach. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2020; 206:111405. [PMID: 33010592 DOI: 10.1016/j.ecoenv.2020.111405] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/12/2020] [Revised: 09/18/2020] [Accepted: 09/19/2020] [Indexed: 06/11/2023]
Abstract
Soils might be a final sink for Ag2S nanoparticles (NPs). Still, there are limited data on their effects on soil bacterial communities (SBC). To bridge this gap, we investigated the effects of Ag2S NPs (10 mg kg-1 soil) on the structure and function of SBC in a terrestrial indoor mesocosm, using a multi-species design. During 28 days of exposure, the SBC function-related parameters were analysed in terms of enzymatic activity, community level physiological profile, culture of functional bacterial groups [phosphorous-solubilizing bacteria (P-SB) and heterotrophic bacteria (HB)], and SBC structure was analysed by 16S rRNA gene-targeted denaturing gradient gel electrophoresis. The SBC exposed to Ag2S NPs showed a significative decrease of functional parameters, such as β-glucosidase activity and L-arginine consumption, and increase of the acid phosphatase activity. At the structural level, significantly lower richness and diversity were detected, but at later exposure times compared to the AgNO3 treatment, likely because of a low dissolution rate of Ag2S NPs. In fact, stronger effects were observed in soils spiked with AgNO3, in both functional and structural parameters. Changes in SBC structure seem to negatively correlate with parameters related to phosphorous (acid phosphatase activity) and carbon cycling (abundance of HB, P-SB, and β-glucosidase activity). Our results indicate a significant effect of Ag2S NPs on SBC, specifically on parameters related to carbon and phosphorous cycling, at doses as low as 10 mg kg-1 soil. These effects were only observed after 28 days, highlighting the importance of long-term exposure experiments for slowly dissolving NPs.
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Affiliation(s)
- S Peixoto
- CESAM-Centre for Environmental and Marine Studies & Department of Biology, University of Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal
| | - Z Khodaparast
- CESAM-Centre for Environmental and Marine Studies & Department of Biology, University of Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal
| | - G Cornelis
- Department of Soil and Environment, Swedish University of Agricultural Sciences, 75651 Uppsala, Sweden
| | - E Lahive
- UK Centre for Ecology and Hydrology, Maclean Building, Benson Lane, Crowmarsh Gifford, Wallingford OX10 8BB, UK
| | - A Green Etxabe
- UK Centre for Ecology and Hydrology, Maclean Building, Benson Lane, Crowmarsh Gifford, Wallingford OX10 8BB, UK
| | - M Baccaro
- Division of Toxicology, Wageningen University, 6708 WE Wageningen, The Netherlands
| | - A G Papadiamantis
- School of Geography, Earth and Environmental Sciences, University of Birmingham, Edgbaston B15 2TT, Birmingham, UK; NovaMechanics Ltd., 1065 Nicosia, Cyprus
| | - S F Gonçalves
- CESAM-Centre for Environmental and Marine Studies & Department of Biology, University of Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal
| | - I Lynch
- UK Centre for Ecology and Hydrology, Maclean Building, Benson Lane, Crowmarsh Gifford, Wallingford OX10 8BB, UK
| | - M Busquets-Fite
- Applied Nanoparticles SL, C Àlaba 88, 08018 Barcelona, Spain
| | - V Puntes
- Institut Català de Nanociència i Nanotecnologia (ICN2), CSIC, The Barcelona Institute of Science and Technology (BIST), Campus UAB, Bellaterra, Barcelona, Spain; Institució Catalana de Recerca i Estudis Avançats (ICREA), 08010 Barcelona, Spain; Vall d'Hebron Institut de Recerca (VHIR), 08035 Barcelona, Spain
| | - S Loureiro
- CESAM-Centre for Environmental and Marine Studies & Department of Biology, University of Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal.
| | - I Henriques
- Department of Life Sciences, Faculty of Sciences and Technology, University of Coimbra, Portugal
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Swart E, Goodall T, Kille P, Spurgeon DJ, Svendsen C. The earthworm microbiome is resilient to exposure to biocidal metal nanoparticles. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2020; 267:115633. [PMID: 33254656 DOI: 10.1016/j.envpol.2020.115633] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/04/2020] [Revised: 09/07/2020] [Accepted: 09/09/2020] [Indexed: 06/12/2023]
Abstract
Environmental pollution can disrupt the interactions between animals and their symbiotic bacteria, which can lead to adverse effects on the host even in the absence of direct chemical toxicity. It is therefore crucial to understand how environmental pollutants affect animal microbiomes, especially for those chemicals that are designed to target microbes. Here, we study the effects of two biocidal nanoparticles (NPs) (Ag and CuO) on the soil bacterial community and the resident gut microbiome of the earthworm Eisenia fetida over a 28-day period using metabarcoding techniques. Exposures to NPs were conducted following OECD test guidelines and effects on earthworm reproduction and juvenile biomass were additionally recorded in order to compare effects on the host to effects on microbiomes. By employing a full concentration series, we were able to link pollutants to microbiome effects in high resolution. Multivariate analysis, differential abundance analysis and species sensitivity distribution analysis showed that Ag-NPs are more toxic to soil bacteria than CuO-NPs. In contrast to the strong effects of CuO-NPs and Ag-NPs on the soil bacterial community, the earthworm gut microbiome is largely resilient to exposure to biocidal NPs. Despite this buffering effect, CuO-NPs did negatively affect the relative abundance of some earthworm symbionts, including 'Candidatus Lumbricincola'. Changes in the soil bacterial community and the earthworm microbiome occur at total copper concentrations often found or modelled to occur in agricultural fields, demonstrating that soil bacterial communities and individual taxa in the earthworm microbiome may be at risk from environmental copper exposure including in nanomaterial form.
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Affiliation(s)
- Elmer Swart
- UK Centre for Ecology and Hydrology, Maclean Building Benson Lane, Wallingford, OX10 8BB, United Kingdom.
| | - Tim Goodall
- UK Centre for Ecology and Hydrology, Maclean Building Benson Lane, Wallingford, OX10 8BB, United Kingdom
| | - Peter Kille
- School of Biosciences, Cardiff University, Sir Martin Evans Building Museum Avenue, Cardiff, CF10 3AX, United Kingdom
| | - David J Spurgeon
- UK Centre for Ecology and Hydrology, Maclean Building Benson Lane, Wallingford, OX10 8BB, United Kingdom
| | - Claus Svendsen
- UK Centre for Ecology and Hydrology, Maclean Building Benson Lane, Wallingford, OX10 8BB, United Kingdom.
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Montes de Oca-Vásquez G, Solano-Campos F, Vega-Baudrit JR, López-Mondéjar R, Vera A, Moreno JL, Bastida F. Organic amendments exacerbate the effects of silver nanoparticles on microbial biomass and community composition of a semiarid soil. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 744:140919. [PMID: 32711321 DOI: 10.1016/j.scitotenv.2020.140919] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/26/2020] [Revised: 06/24/2020] [Accepted: 07/10/2020] [Indexed: 06/11/2023]
Abstract
Increased utilization of silver nanoparticles (AgNPs) can result in an accumulation of these particles in the environment. The potential detrimental effects of AgNPs in soil may be associated with the low fertility of soils in semiarid regions that are usually subjected to restoration through the application of organic amendments. Microbial communities are responsible for fundamental processes related to soil fertility, yet the potential impacts of low and realistic AgNPs concentrations on soil microorganisms are still unknown. We studied the effects of realistic citrate-stabilized AgNPs concentrations (0.015 and 1.5 μg kg-1) at two exposure times (7 and 30 days) on a sandy clay loam Mediterranean soil unamended (SU) and amended with compost (SA). We assessed soil microbial biomass (microbial fatty acids), soil enzyme activities (urease, β-glucosidase, and alkaline phosphatase), and composition of the microbial community (bacterial 16S rRNA gene and fungal ITS2 sequencing) in a microcosm experiment. In the SA, the two concentrations of AgNPs significantly decreased the bacterial biomass after 7 days of incubation. At 30 days of incubation, only a significant decrease in the Gram+ was observed at the highest AgNPs concentration. In contrast, in the SU, there was a significant increase in bacterial biomass after 30 days of incubation at the lowest AgNPs concentration. Overall, we found that fungal biomass was more resistant to AgNPs than bacterial biomass, in both SA and SU. Further, the AgNPs changed the composition of the soil bacterial community in SA, the relative abundance of some bacterial taxa in SA and SU, and fungal richness in SU at 30 days of incubation. However, AgNPs did not affect the activity of extracellular enzymes. This study demonstrates that the exposure time and organic amendments modulate the effects of realistic concentrations of AgNPs in the biomass and composition of the microbial community of a Mediterranean soil.
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Affiliation(s)
- Gabriela Montes de Oca-Vásquez
- National Nanotechnology Laboratory, National Center for High Technology, 10109 Pavas, San José, Costa Rica; Doctorado en Ciencias Naturales para el Desarrollo (DOCINADE), Instituto Tecnológico de Costa Rica, Universidad Nacional, Universidad Estatal a Distancia, Costa Rica.
| | - Frank Solano-Campos
- School of Biological Sciences, Universidad Nacional, Campus Omar Dengo, 86-3000 Heredia, Costa Rica
| | - José R Vega-Baudrit
- National Nanotechnology Laboratory, National Center for High Technology, 10109 Pavas, San José, Costa Rica; Laboratory of Polymer Science and Technology, School of Chemistry, Universidad Nacional, Campus Omar Dengo, 86-3000 Heredia, Costa Rica
| | - Rubén López-Mondéjar
- Laboratory of Environmental Microbiology, Institute of Microbiology of the CAS, Vídeňská 1083, Praha 4 14220, Czech Republic
| | - Alfonso Vera
- CEBAS-CSIC. Department of Soil and Water Conservation. Campus Universitario de Espinardo, 30100 Murcia, Spain
| | - José L Moreno
- CEBAS-CSIC. Department of Soil and Water Conservation. Campus Universitario de Espinardo, 30100 Murcia, Spain
| | - Felipe Bastida
- CEBAS-CSIC. Department of Soil and Water Conservation. Campus Universitario de Espinardo, 30100 Murcia, Spain
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Forstner C, Orton TG, Wang P, Kopittke PM, Dennis PG. Wastewater Treatment Processing of Silver Nanoparticles Strongly Influences Their Effects on Soil Microbial Diversity. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2020; 54:13538-13547. [PMID: 33052663 DOI: 10.1021/acs.est.0c01312] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Silver nanoparticles (NPs) are entering soils with biosolids via wastewater treatment, and on-route, undergo changes (e.g., sulfidation) that alter silver bioavailability and toxicity. While additions of fresh Ag-NPs to soil have been show to influence bacterial diversity, it is unclear whether these effects are representative of realistic exposure pathways. To investigate the effects of wastewater treatment processing on the ecotoxicology of Ag-NPs, we ran sequencing batch reactors for 28 d to produce three batches of sludge: (1) a control, (2) Ag-NP sludge, and (3) AgNO3 sludge. The effects of processed silver on the diversity and composition of soil bacterial and fungal communities were compared to those of fresh Ag-NPs, Ag2S-NPs, and AgNO3, which were added with the control sludge, at two concentrations (1 and 10 mg Ag kg-1 dry soil) over time (3, 7, 30, and 90 d). The effects of processed Ag-NPs on the composition of soil bacterial communities were larger and more persistent than those of fresh Ag-NPs, Ag2S-NPs, and AgNO3. Treatment effects on fungi were relatively minor. These findings suggest that the potential ecological impacts of Ag-NPs entering soils via more realistic exposure pathways (e.g., sludge) are underestimated when extrapolated from studies that focus on applications of fresh Ag-NPs.
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Affiliation(s)
- Christian Forstner
- School of Earth and Environmental Sciences, The University of Queensland, St Lucia, Brisbane, QLD 4072, Australia
| | - Thomas G Orton
- School of Agriculture and Food Sciences, The University of Queensland, St Lucia, Brisbane, QLD 4072, Australia
| | - Peng Wang
- School of Agriculture and Food Sciences, The University of Queensland, St Lucia, Brisbane, QLD 4072, Australia
| | - Peter M Kopittke
- School of Agriculture and Food Sciences, The University of Queensland, St Lucia, Brisbane, QLD 4072, Australia
| | - Paul G Dennis
- School of Earth and Environmental Sciences, The University of Queensland, St Lucia, Brisbane, QLD 4072, Australia
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Kusi J, Scheuerman PR, Maier KJ. Emerging environmental contaminants (silver nanoparticles) altered the catabolic capability and metabolic fingerprinting of microbial communities. AQUATIC TOXICOLOGY (AMSTERDAM, NETHERLANDS) 2020; 228:105633. [PMID: 33069118 DOI: 10.1016/j.aquatox.2020.105633] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/30/2020] [Revised: 08/29/2020] [Accepted: 09/15/2020] [Indexed: 06/11/2023]
Abstract
Microbial community functional diversity enhances the degradation of organic matter and pollutants in the environment, but there is a growing concern that these ecosystem services may be altered by the introduction of emerging environmental contaminants including silver nanoparticles (AgNPs) into aquatic systems. We added 0, 25, 50, 75, 100, and 125 mg L-1 (nominal concentrations) of citrate-AgNP and polyvinylpyrrolidone-AgNP (PVP-AgNP) each to freshwater sediment and examined their antimicrobial effects on microbial communities using community-level physiological profiling. The results showed that citrate-AgNP decreased the overall microbial catabolic activity by 80% from 1.16 ± 0.02 to 0.23 ± 08 while PVP-AgNP decreased the catabolic activity by 51% from 1.25 ± 0.07 to 0.61 ± 0.19 at 125 mg L-1. Citrate-AgNP and PVP-AgNP caused a statistically significant reduction in substrate richness and substrate diversity that decreased microbial functional diversity. AgNPs decreased microbial catabolic capability and functional diversity at concentrations ranging from 0.12 ± 0.04 to 0.43 ± 0.07 mg Ag kg-1 which are lower than the predicted concentrations in freshwater sediment. To our knowledge, this is the first study to demonstrate inhibition of microbial functional diversity by citrate-AgNP and PVP-AgNP in a pathogen impaired stream. Citrate-AgNP caused greater inhibition of carbon substrate utilization but amino acids, carbohydrates, and carboxylic acids were the most affected carbon groups which led to a shift in the metabolic fingerprint pattern of the microbial community. AgNPs decreased the catabolic capability and the ability of the microbial community to degrade organic matter and a variety of pollutants in the environment.
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Affiliation(s)
- Joseph Kusi
- Department of Environmental Health, East Tennessee State University, Johnson City, TN, United States.
| | - Phillip R Scheuerman
- Department of Environmental Health, East Tennessee State University, Johnson City, TN, United States
| | - Kurt J Maier
- Department of Environmental Health, East Tennessee State University, Johnson City, TN, United States
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43
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Kusi J, Scheuerman PR, Maier KJ. Antimicrobial properties of silver nanoparticles may interfere with fecal indicator bacteria detection in pathogen impaired streams. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2020; 263:114536. [PMID: 32320903 DOI: 10.1016/j.envpol.2020.114536] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/25/2019] [Revised: 03/18/2020] [Accepted: 04/03/2020] [Indexed: 06/11/2023]
Abstract
Silver nanoparticles (AgNPs) are expected to enter aquatic systems, but there are limited data on how they might affect microbial communities in pathogen impaired streams. We examined microbial community responses to citrate-AgNP (10.9 ± 0.7 nm) and polyvinylpyrrolidone (PVP)-AgNP (11.0 ± 0.7 nm) based on microbial concentration and enzyme activity in sediment from a pathogen impaired stream. Addition of each nanoparticle to sediment caused at least a 69% decrease in microbial concentration (1,264 ± 93.6 to 127 ± 29.5 CFU/g) and a 62% decrease in β-glucosidase activity (11.7 ± 2.1 to 1.3 ± 0.3 μg/g/h). Each AgNP reduced alkaline phosphatase activity but their effects were not statistically significant. Sediment exposed to 0.108 mg Ag/kg of AgNO3 resulted in a 92% decrease in microbial concentration and a reduced enzyme activity which was not statistically significant. Measured total silver in sediments treated with AgNPs which exhibited significant inhibition effects on the microbial community ranged from 0.19 ± 0.02 to 0.39 ± 0.13 mg Ag/kg. These concentrations tested in this study are much lower than the expected concentrations (2-14 mg Ag/kg) in freshwater sediments. The results of this study demonstrate that AgNPs can alter microbial community activity and population size, which may lead to false negative fecal indicator bacteria detection and enumeration using methods that rely on β-glucosidase activity. We conclude that the presence of AgNPs in impaired streams and recreational waters can influence pathogen detection methods, potentially affecting public health risk estimates.
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Affiliation(s)
- Joseph Kusi
- Department of Environmental Health, East Tennessee State University, Johnson City, TN, United States.
| | - Phillip R Scheuerman
- Department of Environmental Health, East Tennessee State University, Johnson City, TN, United States
| | - Kurt J Maier
- Department of Environmental Health, East Tennessee State University, Johnson City, TN, United States
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Tomczyk A, Szewczuk-Karpisz K, Sokołowska Z, Kercheva M, Dimitrov E. Purification of Aqueous Media by Biochars: Feedstock Type Effect on Silver Nanoparticles Removal. Molecules 2020; 25:E2930. [PMID: 32630537 PMCID: PMC7355759 DOI: 10.3390/molecules25122930] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2020] [Revised: 06/22/2020] [Accepted: 06/24/2020] [Indexed: 12/19/2022] Open
Abstract
Due to the harmful effects of nanoparticles in the environment, their effective removal from aqueous media is of great importance. This paper described the research on the silver nanoparticles (Ag-NPs) sorption on biochars obtained from different feedstock types. The sorbents were produced through pyrolysis (double-barrel method) of the vineyard (BV), paulownia tree (BP), and tobacco (BT). BV exhibited the highest specific surface area, porosity, value of variable surface charge, and content of surface acidic functional groups among the used biochars. The pseudo-second order model best described the obtained adsorption kinetics, whereas the Freundlich model accounted for the registered adsorption data. The Ag-NPs removal was highly efficient in the case of BV, especially in the nanoparticle concentration range 50-500 mg/L. Thus, this biochar can be considered as an ecofriendly, effective, low-cost organic adsorbent, potentially used in the aqueous media purification.
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Affiliation(s)
- Agnieszka Tomczyk
- Institute of Agrophysics, Polish Academy of Sciences, Doświadczalna 4, 20-290 Lublin, Poland; (K.S.-K.); (Z.S.)
| | - Katarzyna Szewczuk-Karpisz
- Institute of Agrophysics, Polish Academy of Sciences, Doświadczalna 4, 20-290 Lublin, Poland; (K.S.-K.); (Z.S.)
| | - Zofia Sokołowska
- Institute of Agrophysics, Polish Academy of Sciences, Doświadczalna 4, 20-290 Lublin, Poland; (K.S.-K.); (Z.S.)
| | - Milena Kercheva
- Institute of Soil Science, Agrotechnology and Plant Protection “N. Poushkarov”, Shosse Bankya 7, Sofia 1080, Bulgaria; (M.K.); (E.D.)
| | - Emil Dimitrov
- Institute of Soil Science, Agrotechnology and Plant Protection “N. Poushkarov”, Shosse Bankya 7, Sofia 1080, Bulgaria; (M.K.); (E.D.)
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Pietsch F, O'Neill AJ, Ivask A, Jenssen H, Inkinen J, Kahru A, Ahonen M, Schreiber F. Selection of resistance by antimicrobial coatings in the healthcare setting. J Hosp Infect 2020; 106:115-125. [PMID: 32535196 DOI: 10.1016/j.jhin.2020.06.006] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2020] [Accepted: 06/03/2020] [Indexed: 12/19/2022]
Abstract
Antimicrobial touch surfaces have been introduced in healthcare settings with the aim of supporting existing hygiene procedures, and to help combat the increasing threat of antimicrobial resistance. However, concerns have been raised over the potential selection pressure exerted by such surfaces, which may drive the evolution and spread of antimicrobial resistance. This review highlights studies that indicate risks associated with resistance on antimicrobial surfaces by different processes, including evolution by de-novo mutation and horizontal gene transfer, and species sorting of inherently resistant bacteria dispersed on to antimicrobial surfaces. The review focuses on antimicrobial surfaces made of copper, silver and antimicrobial peptides because of the practical application of copper and silver, and the promising characteristics of antimicrobial peptides. The available data point to a potential for resistance selection and a subsequent increase in resistant strains via cross-resistance and co-resistance conferred by metal and antibiotic resistance traits. However, translational studies describing the development of resistance to antimicrobial touch surfaces in healthcare-related environments are rare, and will be needed to assess whether and how antimicrobial surfaces lead to resistance selection in these settings. Such studies will need to consider numerous variables, including the antimicrobial concentrations present in coatings, the occurrence of biofilms on surfaces, and the humidity relevant to dry-surface environments. On-site tests on the efficacy of antimicrobial coatings should routinely evaluate the risk of selection associated with their use.
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Affiliation(s)
- F Pietsch
- Federal Institute for Materials Research and Testing, Department of Materials and Environment, Division of Biodeterioration and Reference Organisms, Berlin, Germany
| | - A J O'Neill
- School of Molecular and Cellular Biology, Faculty of Biological Sciences, University of Leeds, Leeds, UK
| | - A Ivask
- Laboratory of Environmental Toxicology, National Institute of Chemical Physics and Biophysics, Tallinn, Estonia; Institute of Molecular and Cell Biology, University of Tartu, Tartu, Estonia
| | - H Jenssen
- Department of Science and Environment, Roskilde University, Roskilde, Denmark
| | - J Inkinen
- Finnish Institute for Health and Welfare, Department of Health Security, Helsinki, Finland
| | - A Kahru
- Laboratory of Environmental Toxicology, National Institute of Chemical Physics and Biophysics, Tallinn, Estonia
| | - M Ahonen
- Satakunta University of Applied Sciences, Faculty of Technology, WANDER Nordic Water and Materials Institute, Rauma, Finland.
| | - F Schreiber
- Federal Institute for Materials Research and Testing, Department of Materials and Environment, Division of Biodeterioration and Reference Organisms, Berlin, Germany.
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46
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Montes de Oca-Vásquez G, Solano-Campos F, Vega-Baudrit JR, López-Mondéjar R, Odriozola I, Vera A, Moreno JL, Bastida F. Environmentally relevant concentrations of silver nanoparticles diminish soil microbial biomass but do not alter enzyme activities or microbial diversity. JOURNAL OF HAZARDOUS MATERIALS 2020; 391:122224. [PMID: 32058228 DOI: 10.1016/j.jhazmat.2020.122224] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/29/2019] [Revised: 01/03/2020] [Accepted: 02/01/2020] [Indexed: 06/10/2023]
Abstract
The increasing use of silver nanoparticles (AgNPs) due to their well-known antimicrobial activity, has led to their accumulation in soil ecosystems. However, the impact of environmental realistic concentrations of AgNPs on the soil microbial community has been scarcely studied. In this work, we have assessed the impact of AgNPs, that mimic real concentrations in nature, on tropical soils cultivated with Coffea arabica under conventional and organic management systems. We evaluated the biomass, extracellular enzyme activities, and diversity of the soil microbial community, in a microcosm experiment as a function of time. After seven days of incubation, we found an increase in microbial biomass in an AgNPs-concentration-independent manner. In contrast, after 60-day-incubation, there was a decrease in Gram+ and actinobacterial biomass, in both soils and all AgNPs concentrations. Soil physico-chemical properties and enzyme activities were not affected overall by AgNPs. Regarding the microbial community composition, only some differences in the relative abundance at phylum and genus level in the fungal community were observed. Our results suggest that environmental concentrations of AgNPs affected microbial biomass but had little impact on microbial diversity and may have little effects on the soil biogeochemical cycles mediated by extracellular enzyme activities.
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Affiliation(s)
- Gabriela Montes de Oca-Vásquez
- National Nanotechnology Laboratory, National Center for High Technology, 10109 Pavas, San José, Costa Rica; Doctorado en Ciencias Naturales para el Desarrollo (DOCINADE), Instituto Tecnológico de Costa Rica, Universidad Nacional, Universidad Estatal a Distancia, Costa Rica.
| | - Frank Solano-Campos
- School of Biological Sciences, Universidad Nacional, Campus Omar Dengo, 86-3000 Heredia, Costa Rica
| | - José R Vega-Baudrit
- National Nanotechnology Laboratory, National Center for High Technology, 10109 Pavas, San José, Costa Rica; Laboratory of Polymer Science and Technology, School of Chemistry, Universidad Nacional, Campus Omar Dengo, 86-3000 Heredia, Costa Rica
| | - Rubén López-Mondéjar
- Laboratory of Environmental Microbiology, Institute of Microbiology of the CAS, Vídeňská 1083, Praha 4 14220, Czech Republic
| | - Iñaki Odriozola
- Laboratory of Environmental Microbiology, Institute of Microbiology of the CAS, Vídeňská 1083, Praha 4 14220, Czech Republic
| | - Alfonso Vera
- CEBAS-CSIC. Department of Soil and Water Conservation, Campus Universitario de Espinardo, 30100, Murcia, Spain
| | - José L Moreno
- CEBAS-CSIC. Department of Soil and Water Conservation, Campus Universitario de Espinardo, 30100, Murcia, Spain
| | - Felipe Bastida
- CEBAS-CSIC. Department of Soil and Water Conservation, Campus Universitario de Espinardo, 30100, Murcia, Spain
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47
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Wu J, Wang G, Vijver MG, Bosker T, Peijnenburg WJGM. Foliar versus root exposure of AgNPs to lettuce: Phytotoxicity, antioxidant responses and internal translocation. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2020; 261:114117. [PMID: 32062092 DOI: 10.1016/j.envpol.2020.114117] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/18/2019] [Revised: 01/22/2020] [Accepted: 01/31/2020] [Indexed: 05/25/2023]
Abstract
Whether toxicity of silver nanoparticles (AgNPs) to organisms originates from the nanoparticles themselves or from the dissolved Ag-ions is still debated, with the majority of studies claiming that extracellular release of Ag-ions is the main cause of toxicity. The objective of this study was to determine the contributions of both particles and dissolved ions to toxic responses, and to better understand the underlying mechanisms of toxicity. In addition, the pathways of AgNPs exposure to plants might play an important role and therefore are explicitly studied as well. We systematically assessed the phytotoxicity, internalization, biodistribution, and antioxidant responses in lettuce (Lactuca sativa) following root or foliar exposure to AgNPs and ionic Ag at various concentrations. For each endpoint the relative contribution of the particle-specific versus the ionic form was quantified. The results reveal particle-specific toxicity and uptake of AgNPs in lettuce as the relative contribution of particulate Ag accounted for more than 65% to the overall toxicity and the Ag accumulation in whole plant tissues. In addition, particle toxicity is shown to originate from the accumulation of Ag in plants by blocking nutrient transport, while ion toxicity is likely due to the induction of excess ROS production. Root exposure induced higher toxicity than foliar exposure at comparable exposure levels. Ag was found to be taken up and subsequently translocated from the exposed parts of plants to other portions regardless of the exposure pathway. These findings suggest particle related toxicity, and demonstrate that the accumulation and translocation of silver nanoparticles need to be considered in assessment of environmental risks and of food safety following consumption of plants exposed to AgNPs by humans.
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Affiliation(s)
- Juan Wu
- Institute of Environmental Sciences (CML), Leiden University, PO Box 9518, 2300 RA, Leiden, the Netherlands.
| | - Guiyin Wang
- Institute of Environmental Sciences (CML), Leiden University, PO Box 9518, 2300 RA, Leiden, the Netherlands; College of Environmental Science, Sichuan Agricultural University, Wenjiang, 611130, China
| | - Martina G Vijver
- Institute of Environmental Sciences (CML), Leiden University, PO Box 9518, 2300 RA, Leiden, the Netherlands
| | - Thijs Bosker
- Institute of Environmental Sciences (CML), Leiden University, PO Box 9518, 2300 RA, Leiden, the Netherlands; Leiden University College, Leiden University, P.O. Box 13228, 2501 EE, The Hague, the Netherlands
| | - Willie J G M Peijnenburg
- Institute of Environmental Sciences (CML), Leiden University, PO Box 9518, 2300 RA, Leiden, the Netherlands; National Institute of Public Health and the Environment, Center for the Safety of Substances and Products, P. O. Box 1, 3720 BA, Bilthoven, the Netherlands
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48
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Wang C, Liu S, Hou J, Wang P, Miao L, Li T. Effects of silver nanoparticles on coupled nitrification-denitrification in suspended sediments. JOURNAL OF HAZARDOUS MATERIALS 2020; 389:122130. [PMID: 31978824 DOI: 10.1016/j.jhazmat.2020.122130] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/18/2019] [Revised: 01/05/2020] [Accepted: 01/16/2020] [Indexed: 06/10/2023]
Abstract
The effects of varying concentrations of Ag NPs on coupled nitrification and denitrification (CND) in two suspended sediments (SPSs) sizes were investigated using isotopic tracer method. In general, 0.5 and 5 mg/L Ag NPs had less effect on CND, while 2 and 10 mg/L Ag NPs exhibited the improvement and inhibition effect, respectively. The CND improvement by 2 mg/L NPs was mainly due to the enhanced nitrifying and denitrifying enzyme activity. However, 10 mg/L Ag NPs inhibited NH4+ oxidation by directly reducing the AMO activity and AOB abundance. The inhibition on NAR and NIR activity and their encoding narG and nirK gene abundance further inhibited NO3- and NO2- reduction, leading to a dramatic decrease in the 15N-N2 production. The above inhibition effects were attributed to the nano-effects of Ag NPs, which led to the excessive ROS amount and the decreased T-AOC level in microbial systems. But the connection between nitrification and denitrification was not broken after Ag NPs exposure. Moreover, the results indicated that N-cycling in clay and silt-type SPS systems could be more sensitive than sand-type SPS systems to NP exposure. The findings provide a basis for evaluating the environmental risks of Ag NPs in water-sediment systems.
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Affiliation(s)
- Chao Wang
- Key Laboratory of Integrated Regulation and Resources Development on Shallow Lakes of Ministry of Education, College of Environment, Hohai University, Nanjing 210098, People's Republic of China
| | - Songqi Liu
- Key Laboratory of Integrated Regulation and Resources Development on Shallow Lakes of Ministry of Education, College of Environment, Hohai University, Nanjing 210098, People's Republic of China
| | - Jun Hou
- Key Laboratory of Integrated Regulation and Resources Development on Shallow Lakes of Ministry of Education, College of Environment, Hohai University, Nanjing 210098, People's Republic of China.
| | - Peifang Wang
- Key Laboratory of Integrated Regulation and Resources Development on Shallow Lakes of Ministry of Education, College of Environment, Hohai University, Nanjing 210098, People's Republic of China
| | - Lingzhan Miao
- Key Laboratory of Integrated Regulation and Resources Development on Shallow Lakes of Ministry of Education, College of Environment, Hohai University, Nanjing 210098, People's Republic of China.
| | - Tengfei Li
- Key Laboratory of Integrated Regulation and Resources Development on Shallow Lakes of Ministry of Education, College of Environment, Hohai University, Nanjing 210098, People's Republic of China
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49
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The effect of engineered PLGA nanoparticles on nitrifying bacteria in the soil environment. J IND ENG CHEM 2020. [DOI: 10.1016/j.jiec.2020.01.011] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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50
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Zhang H, Huang M, Zhang W, Gardea-Torresdey JL, White JC, Ji R, Zhao L. Silver Nanoparticles Alter Soil Microbial Community Compositions and Metabolite Profiles in Unplanted and Cucumber-Planted Soils. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2020; 54:3334-3342. [PMID: 32088952 DOI: 10.1021/acs.est.9b07562] [Citation(s) in RCA: 79] [Impact Index Per Article: 19.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
The rapid development of nanotechnology makes the environmental impact assessment a necessity to ensure the sustainable use of engineered nanomaterials. Here, silver nanoparticles (AgNPs) at 100 mg/kg were added to soils in the absence or presence of cucumber (Cucumis sativa) plants for 60 days. The response of the soil microbial community and associated soil metabolites was investigated by 16S rRNA gene sequencing and gas chromatography-mass spectrometry (GC-MS)-based metabolomics, respectively. The results show that AgNP exposure significantly increased the soil pH in both unplanted and cucumber-planted soils. The soil bacterial community structure was altered upon Ag exposure in both soils. Several functionally significant bacterial groups, which are associated with carbon, nitrogen, and phosphorus cycling, were compromised by AgNPs in both unplanted and cucumber-planted soils. Generally, plants played a limited role in mediating the impact of AgNPs on the bacterial community. Soil metabolomic analysis showed that AgNPs altered the metabolite profile in both unplanted and cucumber-planted soils. The significantly changed metabolites are involved in sugar and amino acid-related metabolic pathways, indicating the perturbation of C and N metabolism, which is consistent with the bacterial community structure results. In addition, several fatty acids were significantly decreased upon exposure to AgNPs in both unplanted and cucumber-planted soils, suggesting the possible oxidative stress imposed on microbial cell membranes. These results provide valuable information for understanding the biological and biochemical impact of AgNP exposure on both plant species and on soil microbial communities; such understanding is needed to understand the risk posed by these materials in the environment.
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Affiliation(s)
- Huiling Zhang
- State Key Laboratory of Pollution Control and Resource Reuse, School of Environment, Nanjing University, Nanjing 210023, China
| | - Min Huang
- State Key Laboratory of Pollution Control and Resource Reuse, School of Environment, Nanjing University, Nanjing 210023, China
| | - Wenhui Zhang
- State Key Laboratory of Pollution Control and Resource Reuse, School of Environment, Nanjing University, Nanjing 210023, China
| | - Jorge L Gardea-Torresdey
- Department of Chemistry and Biochemistry, The University of Texas at El Paso, 500 West University Avenue, El Paso, Texas 79968, United States
| | - Jason C White
- Analytical Chemistry, The Connecticut Agricultural Experiment Station (CAES), New Haven, Connecticut 06504, United States
| | - Rong Ji
- State Key Laboratory of Pollution Control and Resource Reuse, School of Environment, Nanjing University, Nanjing 210023, China
| | - Lijuan Zhao
- State Key Laboratory of Pollution Control and Resource Reuse, School of Environment, Nanjing University, Nanjing 210023, China
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