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Li K, Hao W, Chen Z, Ye Z. Acute inhibitory effects of tire wear particles on the removal of biological phosphorus:The critical role of aging in improving environmentally persistent free radicals. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2024; 360:124638. [PMID: 39089474 DOI: 10.1016/j.envpol.2024.124638] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/23/2024] [Revised: 07/27/2024] [Accepted: 07/28/2024] [Indexed: 08/04/2024]
Abstract
A comparative study explored how photoaging, ozonation aging, and Fenton aging affect tire wear particles (TWPs) and their phosphorus (P) removal in activated sludge. Aging altered TWPs' properties, increasing surface roughness, porosity, and generating more small particles, especially environmental persistent free radicals (EPFRs) in ozonation and Fenton aging. Post-aging TWPs (50 mg/L) inhibited sludge P removal significantly (p < 0.05), with rates of 44.3% and 59.6% for ozonation and Fenton aging, respectively. In addition, the metabolites involved in P cycling (poly-β-hydroxyalkanoates: PHA and glycogen) and essential enzymes (Exopolyphosphatase: PPX and Polyphosphate kinase: PPK) were significantly inhibited (p < 0.05). Moreover, TWPs led to a decrease in microbial cells within the sludge and altered the community structure, a situation exacerbated by the aging of TWPs. P-removing bacteria decreased (e.g., Burkholderia, Candidatus), while extracellular polymeric substance-secreting bacteria increased (e.g., Pseudomonas, Novosphingobium). Pearson correlation analysis highlighted EPFRs' role in TWPs' acute toxicity to microbial cells, yet, emphasizing particle size's impact on the sludge system's purification and community structure.
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Affiliation(s)
- Kun Li
- School of Environmental Science and Engineering, Nanjing University of Information Science and Technology, Nanjing 210044, China; Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control, Jiangsu Collaborative Innovation Center of Atmospheric Environment and Equipment Technology, China.
| | - Wanqi Hao
- School of Environmental Science and Engineering, Nanjing University of Information Science and Technology, Nanjing 210044, China; Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control, Jiangsu Collaborative Innovation Center of Atmospheric Environment and Equipment Technology, China
| | - Zhangle Chen
- School of Environmental Science and Engineering, Nanjing University of Information Science and Technology, Nanjing 210044, China; Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control, Jiangsu Collaborative Innovation Center of Atmospheric Environment and Equipment Technology, China
| | - Zidong Ye
- School of Environmental Science and Engineering, Nanjing University of Information Science and Technology, Nanjing 210044, China; Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control, Jiangsu Collaborative Innovation Center of Atmospheric Environment and Equipment Technology, China
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2
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Cao C, Ding ZH, Huang J, Yan CN. Comprehensive response of microbes to Ag and Ag 2S nanoparticles and silver spatial distribution in constructed wetlands. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 906:167683. [PMID: 37820808 DOI: 10.1016/j.scitotenv.2023.167683] [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: 07/25/2023] [Revised: 09/15/2023] [Accepted: 10/06/2023] [Indexed: 10/13/2023]
Abstract
This study investigated functional bacteria, key enzymes, and nitrogen metabolism in vertical flow constructed wetlands (CWs) after exposing to silver, silver sulfide nanoparticles (Ag NPs and Ag2S NPs), and silver iron (Ag+), and silver spatial distribution in CWs for 155 days. Ag NPs and Ag2S NPs affected species richness and diversity whereas Ag+ showed the higher the species diversity indices. Sequencing analysis exhibited that Ag NPs or Ag+ significantly inhibited nitrogen metabolic process by hindering the relative activity of functional enzymes, downregulating relative abundances of nrfA, norB and napA for Ag NPs, nxrA gene for Ag+, while Ag2S NPs inhibited relative abundance of nirA. The above results confirmed that NPs or Ag+ significantly reduced nitrogen removal and Ag NPs mainly inhibited NO3--N removal while Ag+ significantly suppressed NH4+-N removal. This study also found that CWs could effectively remove NPs or Ag+ (about 98 %), and nanoparticles showed higher translocation factors (TFs) values (0.81-1.15 or 0.36), indicating nanoparticles transported easily through substrate layers.
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Affiliation(s)
- Chong Cao
- Department of Municipal Engineering, College of Civil Engineering, Nanjing Forestry University, Nanjing 210037, China.
| | - Zi Heng Ding
- Department of Municipal Engineering, College of Civil Engineering, Nanjing Forestry University, Nanjing 210037, 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
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3
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Jiang H, Lu H, Zhou Y, Liu Y, Hao C. High-efficiency degradation catalytic performance of a novel Angelica sinensis polysaccharide-silver nanomaterial for dyes by ultrasonic cavitation. ULTRASONICS SONOCHEMISTRY 2023; 93:106289. [PMID: 36638651 PMCID: PMC9852643 DOI: 10.1016/j.ultsonch.2023.106289] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/05/2022] [Revised: 01/02/2023] [Accepted: 01/04/2023] [Indexed: 06/17/2023]
Abstract
Currently, the polluted wastewater discharged by industry accounts for the major part of polluted bodies of water. As one of the industrial wastewaters, dye wastewater is characterized by high toxicity, wide pollution, and difficulty in decolorization degradation. In this paper, a novel composite nanomaterial catalyst of silver was prepared by using Angelica sinensis polysaccharide (ASP) as a reducing and stabilizing agent. And the optimum reaction conditions explored are VAgNO3 = 5 mL (300 mM) and vASP = 7% (w/v) for 6 h at 90 °C. In addition, the ASP-Ag nanocatalyst was characterized by several techniques. The results demonstrated that ASP-Ag nanoparticles were successfully synthesized. Degradation rate, which provides a numerical visualization of the percentage reduction in pollutant concentration. With the wrapping of ASP, the ultrasonic catalytic degradation rates of different organic dyes including rhodamine B (RB), methylene blue (MB), and methyl orange (MO) were from 88.2%, 88.7%, and 85.2% to 96.1%, 95.2% and 93.5% at room temperature, respectively. After the experiments, when cdyes = 10 mg/L, the highest degradation rate can be observed under cAPS-AgNPs = 10 mg/L with the most powerful cavitation frequency f = 59 kHz. The effect of ultrasonic frequency on the acoustic pressure distribution in the reactor was investigated by using COMSOL Multiphysis@ software to propose the mechanism of ultrasonic degradation and the mechanism was confirmed by OH radical trapping experiments. It indicates that OH produced by the ultrasonic cavitation effect plays a determinant role in the degradation. And then, the intermediate products of the dye degradation process were analyzed by gas chromatography and mass spectrometry (GC-MS), and the possible degradation processes of dyes were proposed. The resulting products of degradation are SO42-, NH4+, NO3-, N2, CO2 and H2O. Finally, the recycling degradation experiments showed that catalyst maintains a high degradation rate within reusing 5 cycles. Thus, this catalyst is highly efficient and recyclable.
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Affiliation(s)
- Hao Jiang
- Shaanxi Key Laboratory of Ultrasound, Shaanxi Normal University, Xi'an 710062, China; College of Food Engineering and Nutritional Science, Shaanxi Normal University, Xi'an 710062, China
| | - Haonan Lu
- Shaanxi Key Laboratory of Ultrasound, Shaanxi Normal University, Xi'an 710062, China; College of Food Engineering and Nutritional Science, Shaanxi Normal University, Xi'an 710062, China
| | - Yongshan Zhou
- Shaanxi Key Laboratory of Ultrasound, Shaanxi Normal University, Xi'an 710062, China; College of Food Engineering and Nutritional Science, Shaanxi Normal University, Xi'an 710062, China
| | - Yongfeng Liu
- Shaanxi Key Laboratory of Ultrasound, Shaanxi Normal University, Xi'an 710062, China; College of Food Engineering and Nutritional Science, Shaanxi Normal University, Xi'an 710062, China.
| | - Changchun Hao
- Shaanxi Key Laboratory of Ultrasound, Shaanxi Normal University, Xi'an 710062, China; College of Food Engineering and Nutritional Science, Shaanxi Normal University, Xi'an 710062, China.
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4
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Lan A, Wang X, Wang T, Song Y. TiO2 Nanotube Arrays as a Photoelctrochemical Platform for Sensitive Ag+ Ion Detection based on a Chemical Replacement Reaction. J Electroanal Chem (Lausanne) 2023. [DOI: 10.1016/j.jelechem.2023.117177] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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5
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Hong Y, Tu Q, Cheng H, Huangfu X, Chen Z, He Q. Chronic high-dose silver nanoparticle exposure stimulates N 2O emissions by constructing anaerobic micro-environment. WATER RESEARCH 2022; 225:119104. [PMID: 36155009 DOI: 10.1016/j.watres.2022.119104] [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: 05/20/2022] [Revised: 09/05/2022] [Accepted: 09/10/2022] [Indexed: 06/16/2023]
Abstract
Silver nanoparticles (Ag-NPs) were found to be responsible for nitrous oxide (N2O) generation; however, the mechanism of Ag-NP induced N2O production remains controversial and needs to be elucidated. In this study, chronic Ag-NP exposure experiments were conducted in five independent sequencing batch biofilm reactors to systematically assess the effects of Ag-NPs on N2O emission. The results indicated that a low dose of Ag-NPs (< 1 mg/L) slightly suppressed N2O generation by less than 22.99% compared with the no-Ag-NP control method. In contrast, a high dose (5 mg/L) of Ag-NPs stimulated N2O emission by 67.54%. ICP-MS and SEM-EDS together revealed that high Ag-NP content accumulated on the biofilm surface when exposed to 5 mg/L Ag-NPs. N2O and DO microelectrodes, as well as N2O isotopic composition analyses, further demonstrated that the accumulated Ag-NPs construct the anaerobic zone in the biofilm, which is the primary factor for the stimulation of the nitrite reduction pathway to release N2O. A metagenomic analysis further attributed the higher N2O emissions under exposure to a high dose of Ag-NPs to the higher relative abundance of narB and nirK genes (i.e. 1.52- and 1.29-fold higher, respectively). These findings collectively suggest that chronic exposure to high doses of Ag-NPs could enhance N2O emissions by forming anaerobic micro-environments in biofilms.
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Affiliation(s)
- Yiyihui Hong
- Key Laboratory of Eco-environments in Three Gorges Reservoir Region, Ministry of Education, College of Environment and Ecology, Chongqing University, Chongqing 400044, China
| | - Qianqian Tu
- Key Laboratory of Eco-environments in Three Gorges Reservoir Region, Ministry of Education, College of Environment and Ecology, Chongqing University, Chongqing 400044, China; China TieGong Investment & Construction Group Co., Ltd, Beijing 101300, China
| | - Hong Cheng
- Key Laboratory of Eco-environments in Three Gorges Reservoir Region, Ministry of Education, College of Environment and Ecology, Chongqing University, Chongqing 400044, China.
| | - Xiaoliu Huangfu
- Key Laboratory of Eco-environments in Three Gorges Reservoir Region, Ministry of Education, College of Environment and Ecology, Chongqing University, Chongqing 400044, China
| | - Ziwei Chen
- Key Laboratory of Eco-environments in Three Gorges Reservoir Region, Ministry of Education, College of Environment and Ecology, Chongqing University, Chongqing 400044, China
| | - Qiang He
- Key Laboratory of Eco-environments in Three Gorges Reservoir Region, Ministry of Education, College of Environment and Ecology, Chongqing University, Chongqing 400044, China
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6
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Zheng Y, Wan Y, Zhang Y, Huang J, Yang Y, Tsang DCW, Wang H, Chen H, Gao B. Recovery of phosphorus from wastewater: A review based on current phosphorous removal technologies. CRITICAL REVIEWS IN ENVIRONMENTAL SCIENCE AND TECHNOLOGY 2022; 53:1148-1172. [PMID: 37090929 PMCID: PMC10116781 DOI: 10.1080/10643389.2022.2128194] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
Phosphorus (P) as an essential nutrient for life sustains the productivity of food systems; yet misdirected P often accumulates in wastewater and triggers water eutrophication if not properly treated. Although technologies have been developed to remove P, little attention has been paid to the recovery of P from wastewater. This work provides a comprehensive review of the state-of-the-art P removal technologies in the science of wastewater treatment. Our analyses focus on the mechanisms, removal efficiencies, and recovery potential of four typical water and wastewater treatment processes including precipitation, biological treatment, membrane separation, and adsorption. The design principles, feasibility, operation parameters, and pros & cons of these technologies are analyzed and compared. Perspectives and future research of P removal and recovery are also proposed in the context of paradigm shift to sustainable water treatment technology.
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Affiliation(s)
- Yulin Zheng
- Department of Agricultural and Biological Engineering, University of Florida, Gainesville, Florida, USA
| | - Yongshan Wan
- National Health and Environmental Effects Research Laboratory, US EPA, Gulf Breeze, Florida, USA
| | - Yue Zhang
- Department of Agricultural and Biological Engineering, University of Florida, Gainesville, Florida, USA
| | - Jinsheng Huang
- Department of Agricultural and Biological Engineering, University of Florida, Gainesville, Florida, USA
| | - Yicheng Yang
- Department of Agricultural and Biological Engineering, University of Florida, Gainesville, Florida, USA
| | - Daniel C W Tsang
- Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Kowloon, Hong Kong
| | - Hailong Wang
- School of Environmental and Chemical Engineering, Foshan University, Foshan, China
| | - Hao Chen
- Department of Agriculture, University of Arkansas at Pine Bluff, Pine Bluff, Arkansas, USA
| | - Bin Gao
- Department of Agricultural and Biological Engineering, University of Florida, Gainesville, Florida, USA
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7
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Jagaba AH, Kutty SRM, Isa MH, Ghaleb AAS, Lawal IM, Usman AK, Birniwa AH, Noor A, Abubakar S, Umaru I, Saeed AAH, Afolabi HK, Soja UB. Toxic Effects of Xenobiotic Compounds on the Microbial Community of Activated Sludge. CHEMBIOENG REVIEWS 2022. [DOI: 10.1002/cben.202100055] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
- Ahmad Hussaini Jagaba
- Universiti Teknologi PETRONAS Department of Civil and Environmental Engineering 32610 Bandar Seri Iskandar Perak Darul Ridzuan Malaysia
- Abubakar Tafawa Balewa University Department of Civil Engineering Bauchi Nigeria
| | - Shamsul Rahman Mohamed Kutty
- Universiti Teknologi PETRONAS Department of Civil and Environmental Engineering 32610 Bandar Seri Iskandar Perak Darul Ridzuan Malaysia
- Universiti Teknologi PETRONAS Centre of Urban Resource Sustainability Institute of Self-Sustainable Building 32610 Bandar Seri Iskandar Perak Darul Ridzuan Malaysia
| | - Mohamed Hasnain Isa
- Universiti Teknologi Brunei Civil Engineering Programme Faculty of Engineering Tungku Highway BE1410 Gadong Brunei Darussalam
| | - Aiban Abdulhakim Saeed Ghaleb
- Universiti Teknologi PETRONAS Department of Civil and Environmental Engineering 32610 Bandar Seri Iskandar Perak Darul Ridzuan Malaysia
| | - Ibrahim Mohammed Lawal
- Abubakar Tafawa Balewa University Department of Civil Engineering Bauchi Nigeria
- University of Strathclyde Department of Civil and Environmental Engineering Glasgow United Kingdom
| | | | | | - Azmatullah Noor
- Universiti Teknologi PETRONAS Department of Civil and Environmental Engineering 32610 Bandar Seri Iskandar Perak Darul Ridzuan Malaysia
| | - Sule Abubakar
- Abubakar Tafawa Balewa University Department of Civil Engineering Bauchi Nigeria
| | - Ibrahim Umaru
- Abubakar Tafawa Balewa University Department of Civil Engineering Bauchi Nigeria
| | - Anwar Ameen Hezam Saeed
- Universiti Teknologi PETRONAS Department of Civil and Environmental Engineering 32610 Bandar Seri Iskandar Perak Darul Ridzuan Malaysia
| | - Haruna Kolawole Afolabi
- Universiti Teknologi PETRONAS Department of Civil and Environmental Engineering 32610 Bandar Seri Iskandar Perak Darul Ridzuan Malaysia
| | - Usman Bala Soja
- Federal University Dutsin-Ma Department of Civil Engineering P.M.B. 5001 Dutsin-Ma Katsina State Nigeria
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8
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Wang SN, Fang F, Li KY, Yue YR, Xu RZ, Luo JY, Ni BJ, Cao JS. Sludge reduction and microbial community evolution of activated sludge induced by metabolic uncoupler o-chlorophenol in long-term anaerobic-oxic process. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2022; 316:115230. [PMID: 35537269 DOI: 10.1016/j.jenvman.2022.115230] [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: 11/18/2021] [Revised: 04/24/2022] [Accepted: 05/02/2022] [Indexed: 06/14/2023]
Abstract
Excess sludge management is a restrictive factor for the development of municipal wastewater treatment plants. The addition of metabolic uncouplers has been proven to be effective in sludge reduction. However, the long-term effect of metabolic uncoupler o-chlorophenol (oCP) on the biological wastewater treatment system operated in anaerobic-oxic mode is still unclear. To this end, two parallel reactors operated in anaerobic-oxic mode with and without 10 mg/L of oCP addition were investigated for 91 days. The results showed that 56.1 ± 2.3% of sludge reduction was achieved in the oCP-added system, and the nitrogen and phosphorus removal ability were negatively affected. Dosing oCP stimulated the formation of microbial products and increased the DNA concentration, but resulted in a decrease in the electronic transport activity of activated sludge. Microbial community analysis further demonstrated that a significant reduction of bacterial richness and diversity occurred after oCP dosing. However, after stopping oCP addition, the pollutant removal ability of activated sludge was gradually increased, but the sludge yield, as well as species richness and diversity, did not recover to the previous level. This study will provide insightful guidance on the long-term application of metabolic uncouplers in the activated sludge system.
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Affiliation(s)
- Su-Na Wang
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, College of Environment, Hohai University, Nanjing, 210098, China
| | - Fang Fang
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, College of Environment, Hohai University, Nanjing, 210098, China.
| | - Ke-Yan Li
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, College of Environment, Hohai University, Nanjing, 210098, China
| | - Ying-Rong Yue
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, College of Environment, Hohai University, Nanjing, 210098, China
| | - Run-Ze Xu
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, College of Environment, Hohai University, Nanjing, 210098, China
| | - Jing-Yang Luo
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, College of Environment, Hohai University, Nanjing, 210098, China
| | - Bing-Jie Ni
- Centre for Technology in Water and Wastewater (CTWW), School of Civil and Environmental Engineering, University of Technology Sydney (UTS), Sydney, NSW, 2007, Australia
| | - Jia-Shun Cao
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, College of Environment, Hohai University, Nanjing, 210098, China
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9
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Geng M, Li L, Ai M, Jin J, Hu D, Song K. Recent Advances in Metal-Based Nanoparticle-Mediated Biological Effects in Arabidopsis thaliana: A Mini Review. MATERIALS 2022; 15:ma15134539. [PMID: 35806668 PMCID: PMC9267373 DOI: 10.3390/ma15134539] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/17/2022] [Revised: 06/23/2022] [Accepted: 06/26/2022] [Indexed: 02/05/2023]
Abstract
The widespread application of metal-based nanoparticles (MNPs) has prompted great interest in nano-biosafety. Consequently, as more and more MNPs are released into the environment and eventually sink into the soil, plants, as an essential component of the ecosystem, are at greater risk of exposure and response to these MNPs. Therefore, to understand the potential impact of nanoparticles on the environment, their effects should be thoroughly investigated. Arabidopsis (Arabidopsis thaliana L.) is an ideal model plant for studying the impact of environmental stress on plants’ growth and development because the ways in which Arabidopsis adapt to these stresses resemble those of many plants, and therefore, conclusions obtained from these scientific studies have often been used as the universal reference for other plants. This study reviewed the main findings of present-day interactions between MNPs and Arabidopsis thaliana from plant internalization to phytotoxic effects to reveal the mechanisms by which nanomaterials affect plant growth and development. We also analyzed the remaining unsolved problems in this field and provide a perspective for future research directions.
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Affiliation(s)
- Min Geng
- College of Food and Biology, Changchun Polytechnic, Changchun 130033, China;
| | - Linlin Li
- School of Life Science, Changchun Normal University, Changchun 130032, China; (L.L.); (M.A.); (J.J.); (D.H.)
| | - Mingjun Ai
- School of Life Science, Changchun Normal University, Changchun 130032, China; (L.L.); (M.A.); (J.J.); (D.H.)
| | - Jun Jin
- School of Life Science, Changchun Normal University, Changchun 130032, China; (L.L.); (M.A.); (J.J.); (D.H.)
| | - Die Hu
- School of Life Science, Changchun Normal University, Changchun 130032, China; (L.L.); (M.A.); (J.J.); (D.H.)
| | - Kai Song
- School of Life Science, Changchun Normal University, Changchun 130032, China; (L.L.); (M.A.); (J.J.); (D.H.)
- Institute of Science, Technology and Innovation, Changchun Normal University, Changchun 130032, China
- Correspondence:
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Li S, Chen S, Zhang Z, Huang Y, Li G, Li Y, Deng X, Li J. Short-term exposure to silver nano-particles alters the physiology and induces stress-related gene expression in Nelumbo nucifera. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2022; 177:38-45. [PMID: 35245773 DOI: 10.1016/j.plaphy.2022.02.021] [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: 11/11/2021] [Revised: 02/22/2022] [Accepted: 02/23/2022] [Indexed: 06/14/2023]
Abstract
Lotus (Nelumbo nucifera) was used as model plant in this study to explore its physiology and molecular response upon short-term exposure to silver nano-particles (AgNPs). Accumulation patterns demonstrated a potential uptake of AgNPs by roots and transport to the leaves as a likely key translocation route in lotus. AgNPs exposure was negatively correlated with lotus growth, including germination rate and petiole length in a concentration-dependent manner. Synthesis of chloroplast pigments in lotus leaves was enhanced by low AgNPs concentration, but were inhibited at high concentration. Hydrogen peroxide (H2O2) was detected in lotus leaves after AgNPs treatment. Proline accumulation in lotus leaves was induced with the increase in AgNPs concentration and exposure time. Antioxidant enzyme activities of superoxide dismutase (SOD), peroxidase (POD) as well as catalase (CAT) were enhanced after the first day of AgNPs exposure, but declined with increased exposure time, indicating a time-dependent toxicity of AgNPs. In addition, real-time PCR revealed that two detoxification-related genes, GSH1 and GST, could be activated on the first day of AgNPs exposure, but down-regulated with prolonged AgNPs treatment. Photosynthesis-related RbcS gene was up-regulated, however, no obvious difference in the expression of RbcL was observed after the first day of AgNPs exposure. Moreover, WRKY70a and WRKY70b transcription factors exhibited similar expression patterns, with the highest induction after a 5 mg/L AgNPs exposure on the first day, which decreased with prolonged exposure time. This study provides useful references for further evaluation of the toxic mechanism of AgNPs and their bio-effects on aquatic plants and ecosystems.
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Affiliation(s)
- Shang Li
- School of Chemistry, Chemical Engineering and Life Sciences, Wuhan University of Technology, Wuhan, 430070, China
| | - Simeng Chen
- School of Chemistry, Chemical Engineering and Life Sciences, Wuhan University of Technology, Wuhan, 430070, China
| | - Zeyu Zhang
- School of Chemistry, Chemical Engineering and Life Sciences, Wuhan University of Technology, Wuhan, 430070, China
| | - Yufei Huang
- School of Chemistry, Chemical Engineering and Life Sciences, Wuhan University of Technology, Wuhan, 430070, China
| | - Guoqian Li
- School of Chemistry, Chemical Engineering and Life Sciences, Wuhan University of Technology, Wuhan, 430070, China
| | - Yi Li
- School of Chemistry, Chemical Engineering and Life Sciences, Wuhan University of Technology, Wuhan, 430070, China
| | - Xianbao Deng
- Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan, 430074, China
| | - Jing Li
- School of Chemistry, Chemical Engineering and Life Sciences, Wuhan University of Technology, Wuhan, 430070, China.
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11
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Huang H, Dong L, Wu Y, Zhou S, Zheng X, Chen Y. Long-term exposure to zinc oxide nanoparticles improves PAOs function in enhanced biological phosphorus removal. ENVIRONMENTAL TECHNOLOGY 2022:1-9. [PMID: 35084292 DOI: 10.1080/09593330.2022.2034982] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/16/2021] [Accepted: 01/15/2022] [Indexed: 06/14/2023]
Abstract
As the most widely applied process for biological phosphorus removal, enhanced biological phosphorus removal (EBPR) relies on phosphorus accumulating organisms (PAOs) and glycogen accumulating organisms (GAOs), whose function is crucial for the removal of phosphorus. In this study, the effect of zinc oxide nanoparticles (ZnO NPs, 0-50 mg/L) on EBPR performance was investigated in both long-term reactors and batch experiments. It was found that the performance of biological phosphorus removal was recovered from 0% (day 0) to >99% (day 70) after long-term exposure of ZnO NPs (50 mg/L). Further studies revealed that ZnO NPs treatment caused no significant effects on the morphology and settleability of activated sludge, but enhanced the release and uptake of phosphorus as well as the transformations of polyhydroxyalkanoates and glycogen in activated sludge, which suggested that PAOs were re-activated during long-term exposure to ZnO NPs. Fluorescence in-situ hybridization (FISH) analysis showed that the relative abundance of PAOs was increased after long-term exposure. Meanwhile, the enzymatic activities of PPX and PPK were also enhanced. These results indicated that compared with short-term exposure, long-term exposure to ZnO NPs favours PAOs function and thus led to the recovery of biological phosphorus removal.
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Affiliation(s)
- Haining Huang
- State Key Laboratory of Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Tongji University, Shanghai, People's Republic of China
- Shanghai Municipal Engn Design Inst Grp Co LTD, Shanghai, People's Republic of China
| | - Lei Dong
- State Key Laboratory of Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Tongji University, Shanghai, People's Republic of China
- Shanghai Municipal Engn Design Inst Grp Co LTD, Shanghai, People's Republic of China
| | - Yang Wu
- State Key Laboratory of Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Tongji University, Shanghai, People's Republic of China
- Shanghai Municipal Engn Design Inst Grp Co LTD, Shanghai, People's Republic of China
| | - Shuyang Zhou
- Zhuhai Gaolan Port Sino French Water Co. Ltd, Zhuhai, People's Republic of China
| | - Xiong Zheng
- State Key Laboratory of Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Tongji University, Shanghai, People's Republic of China
- Shanghai Municipal Engn Design Inst Grp Co LTD, Shanghai, People's Republic of China
| | - Yinguang Chen
- State Key Laboratory of Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Tongji University, Shanghai, People's Republic of China
- Shanghai Municipal Engn Design Inst Grp Co LTD, Shanghai, People's Republic of China
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12
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Xia WJ, Wang H, Yu LQ, Li GF, Xiong JR, Zhu XY, Wang XC, Zhang JR, Huang BC, Jin RC. Coagulants put phosphate-accumulating organisms at a competitive disadvantage with glycogen-accumulating organisms in enhanced biological phosphorus removal system. BIORESOURCE TECHNOLOGY 2022; 346:126658. [PMID: 34974097 DOI: 10.1016/j.biortech.2021.126658] [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: 11/18/2021] [Revised: 12/26/2021] [Accepted: 12/27/2021] [Indexed: 06/14/2023]
Abstract
Enhanced biological phosphorus removal (EBPR) process is susceptible to the changed operation condition, which results in an unstable treatment performance. In this work, long-term effect of coagulants addition, aluminum salt for the reactor R1 and iron salt for the reactor R2, on EBPR systems was comprehensively evaluated. Results showed that during the initial 30 days' coagulant addition, effluent chemical oxygen demand and phosphorus can be reduced below 25 and 0.5 mg·L-1, respectively. Further supply of metal salts would stimulate microbial extracellular polymeric substance excretion and induce reactive oxygen species accumulation, which destroyed the cell membrane integrity and deteriorated the phosphorus removal performance. Moreover, coagulants would decrease the relative abundance of Candidatus Accumulibacter while increase the relative abundance of Candidatus Competibacter, leading phosphors accumulating organisms in a disadvantage position. The results of this work might be valuable for the operation of chemical assisted biological phosphorus removal bioreactor.
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Affiliation(s)
- Wen-Jing Xia
- School of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou 311121, China
| | - Hao Wang
- School of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou 311121, China
| | - Lin-Qian Yu
- School of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou 311121, China
| | - Gui-Feng Li
- School of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou 311121, China
| | - Jin-Rui Xiong
- School of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou 311121, China
| | - Xiao-Yan Zhu
- School of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou 311121, China
| | - Xue-Chao Wang
- School of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou 311121, China
| | - Jia-Rui Zhang
- School of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou 311121, China
| | - Bao-Cheng Huang
- School of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou 311121, China.
| | - Ren-Cun Jin
- School of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou 311121, China
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13
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Cao J, Zhu Q, Zhang T, Wu Y, Zhang Q, Fu B, Fang F, Feng Q, Luo J. Distribution patterns of microbial community and functional characteristics in full-scale wastewater treatment plants: Focusing on the influent types. CHEMOSPHERE 2021; 281:130899. [PMID: 34289605 DOI: 10.1016/j.chemosphere.2021.130899] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/01/2021] [Revised: 05/09/2021] [Accepted: 05/13/2021] [Indexed: 06/13/2023]
Abstract
The impacts of the influent type in wastewater treatment plants (WWTPs) on the distribution patterns of the microbial community and functional characteristics were investigated. The obtained results indicated that the influent types exhibited evident influences on the microbial distribution patterns. The diversity and richness of functional microbes in HI-WWTP (with a ratio of >30% industrial wastewater in influents) were evidently decreased compared with those in HM- (with 70-90% municipal wastewater in influents) and M-WWTPs (with >90% municipal wastewater in influents). The core functional bacteria included denitrifiers, anaerobic fermentation bacteria (AFB), organic degrading bacteria (ODB), phosphorus accumulating organisms (PAO) and nitrite oxidizing bacteria (NOB), but they exhibited distinct abundances in WWTPs receiving different categories of wastewater. The denitrifiers in HI-WWTPs was 15.6-32.5% higher than that in other WWTPs, while PAOs had higher abundances in M - and HI-WWTPs (28.9% and 39.3%, respectively) compared with HM-WWTPs. Clear co-occurrence relationships were found among the main functional microbes with similar metabolic characteristics. Moreover, information on functional genes related to carbon, nitrogen and phosphorus metabolism, which is closely associated with pollutant removal efficiency, was obtained. M-WWTPs had higher abundances of genetic expressions for organic matters degradation (i.e. amino acid (10.42%) and carbohydrate (9.86%) metabolisms). Nar, Nir and Nor showed lowest abundances in HM-WWTPs, causing the low nitrogen removal (63.04-65.79%). However, influent type had little effect on genetic expression related with phosphorus removal. This work provided new insights into the interrelationship among bacterial co-occurrence, microbial activity and pollutant removal in WWTPs with different influent types.
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Affiliation(s)
- Jiashun Cao
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, Hohai University, Nanjing, 210098, China; College of Environment, Hohai University, Nanjing, 210098, China
| | - Qirong Zhu
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, Hohai University, Nanjing, 210098, China; College of Environment, Hohai University, Nanjing, 210098, China
| | - Teng Zhang
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, Hohai University, Nanjing, 210098, China; College of Environment, Hohai University, Nanjing, 210098, China
| | - Yang Wu
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, Hohai University, Nanjing, 210098, China; College of Environment, Hohai University, Nanjing, 210098, China
| | - Qin Zhang
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, Hohai University, Nanjing, 210098, China; College of Environment, Hohai University, Nanjing, 210098, China
| | - Boming Fu
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, Hohai University, Nanjing, 210098, China; College of Environment, Hohai University, Nanjing, 210098, China
| | - Fang Fang
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, Hohai University, Nanjing, 210098, China; College of Environment, Hohai University, Nanjing, 210098, China
| | - Qian Feng
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, Hohai University, Nanjing, 210098, China; College of Environment, Hohai University, Nanjing, 210098, China
| | - Jingyang Luo
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, Hohai University, Nanjing, 210098, China; College of Environment, Hohai University, Nanjing, 210098, China.
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14
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Ma X, Wang Z, Hu X, Chen J, Zhang H, Li X, Xie F, Xu J. Nanozyme catalysis-powered portable mini-drainage device enables real-time and universal weighing analysis of silver ions and silver nanoparticles. JOURNAL OF HAZARDOUS MATERIALS 2021; 415:125689. [PMID: 33773247 DOI: 10.1016/j.jhazmat.2021.125689] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/15/2020] [Revised: 02/05/2021] [Accepted: 03/15/2021] [Indexed: 06/12/2023]
Abstract
We introduce a real-time quantitative analytical method for universal silver ions (Ag(I)) and silver nanoparticles (AgNPs) analysis based on a portable nanozyme catalysis-powered portable mini-drainage device. The device is composed of three main glass containers with different specifications. The catalase mimic of ascorbic acid-coated platinum nanoparticles (AA-PtNPs) was used to provide the pumping power to drain water by catalyzing a gas-generation reaction, and the inhibition effect of Ag(I) on the catalytic activity of AA-PtNPs is adopted to connect the target detection event with the mini-drainage device. Experimental results reveal that the mass of the overflowed water is inversely proportional to the concentration of Ag(I) and AgNPs so that their quantitation can be accomplished via real-time weighing of the overflowed water. The importance is that without requiring advanced instruments, this device can quantify Ag(I) and AgNPs with a limit of detection (LOD) of 2.0 nM for Ag(I), and 3.8 pM for AgNPs within 30 min, respectively. The reliability and accuracy are comparable with the inductively coupled plasma optical emission spectrometer (ICP-OES). All these appealing features provide us a remarkable insight into the design of versatile portable devices with potential applications in in-situ environmental monitoring under remote areas and resource-limited settings.
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Affiliation(s)
- Xiaoming Ma
- School of Chemistry and Chemical Engineering, Gannan Normal University, Ganzhou 341000, PR China; State Key Laboratory of Chemo/Biosensing and Chemometrics, Hunan University, Changsha 410082, PR China
| | - Zhen Wang
- School of Chemistry and Chemical Engineering, Gannan Normal University, Ganzhou 341000, PR China
| | - Xuan Hu
- School of Chemistry and Chemical Engineering, Gannan Normal University, Ganzhou 341000, PR China
| | - Jinghua Chen
- School of Chemistry and Chemical Engineering, Gannan Normal University, Ganzhou 341000, PR China
| | - Huifang Zhang
- School of Chemistry and Chemical Engineering, Gannan Normal University, Ganzhou 341000, PR China
| | - Xun Li
- School of Chemistry and Chemical Engineering, Gannan Normal University, Ganzhou 341000, PR China
| | - Fengyan Xie
- Fujian Key Laboratory of Functional Marine Sensing Materials, Minjiang University, Fuzhou 350108, PR China
| | - Jianguo Xu
- School of Food and Biological Engineering, Hefei University of Technology, Hefei 230009, PR China; State Key Laboratory of Chemo/Biosensing and Chemometrics, Hunan University, Changsha 410082, PR China; Fujian Key Laboratory of Functional Marine Sensing Materials, Minjiang University, Fuzhou 350108, PR China.
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15
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Xiao J, Huang J, Wang M, Huang M, Wang Y. The fate and long-term toxic effects of NiO nanoparticles at environmental concentration in constructed wetland: Enzyme activity, microbial property, metabolic pathway and functional genes. JOURNAL OF HAZARDOUS MATERIALS 2021; 413:125295. [PMID: 33609865 DOI: 10.1016/j.jhazmat.2021.125295] [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: 10/25/2020] [Revised: 01/22/2021] [Accepted: 01/30/2021] [Indexed: 06/12/2023]
Abstract
Although the potential threats of metallic oxide nanoparticles (MNPs) to constructed wetland (CW) have been broadly reported, limited information is available regarding the long-term impact of nickel oxide nanoparticles (NiO NPs) on CWs at the environmentally relevant concentrations. Here, we comprehensively elucidated the responses in the treatment performance, enzyme activities, microbial properties, metabolic pathways and functional genes of CWs to chronic exposure of NiO NPs (0.1 and 1 mg/L) for 120 days, with a quantitative analysis on the fate and migration of NiO NPs within CWs. Nitrogen removal evidently declined under the long-term exposure to NiO NPs. Besides, NiO NPs induced a deterioration in phosphorus removal, but gradually restored over time. The activities of dehydrogenase (DHA), phosphatase (PST), urease (URE), ammonia oxygenase (AMO) and nitrate reductase (NAR) were inhibited to some extent under NiO NPs stress. Furthermore, NiO NPs exposure reduced bacterial diversity, shifted microbial composition and obviously inhibited the transcription of the ammonia oxidizing and denitrifying functional genes. The results of nickel mass balance indicated that the major removal mechanism of NiO NPs in CWs was through substrate adsorption and plants uptake. Thus, the ecological impacts of prolonged NiO NPs exposure at environmental concentrations should not be neglected.
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Affiliation(s)
- Jun Xiao
- School of Civil Engineering, Southeast University, Nanjing, Jiangsu 211189, PR China
| | - Juan Huang
- School of Civil Engineering, Southeast University, Nanjing, Jiangsu 211189, PR China.
| | - Mingyu Wang
- School of Civil Engineering, Southeast University, Nanjing, Jiangsu 211189, PR China
| | - Minjie Huang
- School of Civil Engineering, Southeast University, Nanjing, Jiangsu 211189, PR China
| | - Ying Wang
- School of Civil Engineering, Southeast University, Nanjing, Jiangsu 211189, PR China
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16
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Wu L, Wei Q, Zhang Y, Fan Y, Li M, Rong L, Xiao X, Huang X, Zou X. Effects of antibiotics on enhanced biological phosphorus removal and its mechanisms. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 774:145571. [PMID: 33611003 DOI: 10.1016/j.scitotenv.2021.145571] [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: 01/07/2021] [Revised: 01/28/2021] [Accepted: 01/29/2021] [Indexed: 06/12/2023]
Abstract
Many kinds of antibiotics are continuously discharged into wastewater and typically cause a great decrease in sewage treatment performance, whereas mechanisms of differences in the impacts of commonly used antibiotics on phosphate removal are still elusive. Thus, an enhanced biological phosphorus removal (EBPR) system, as an effective method of phosphate removal, was developed, and its performance in the treatment of artificial wastewater containing antibiotics at short- (8 h) and long-term (15 days) exposure was investigated. The results show that phosphorus removal was consistently inhibited by the addition of antibiotics with a significant difference (P < 0.05). To interpret the phenomena, mechanistic equations were developed, and the results indicate that for short-term tests, the difference was mainly caused by the suppression of polyhydroxyalkanoate (PHA) degradation and the activity of polyphosphate kinase (PPK), resulting in the different inhibition of the soluble orthophosphorus (SOP) uptake process. For long-term tests, the difference in SOP uptake was principally caused by the inhibition of PHA degradation and the activity of PPK, whereas the difference in SOP release resulted from the inhibition of activities of exopolyphosphatase (PPX) and adenylate kinase (ADK). Moreover, micro-mechanisms of such inhibition were identified from molecular docking and electrostatic potential.
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Affiliation(s)
- Ligui Wu
- School of Life Science, Jinggangshan University, Ji'an 343009, China
| | - Quantao Wei
- School of Life Science, Jinggangshan University, Ji'an 343009, China
| | - Yingying Zhang
- School of Life Science, Jinggangshan University, Ji'an 343009, China
| | - Yuxing Fan
- School of Life Science, Jinggangshan University, Ji'an 343009, China
| | - Mi Li
- School of Life Science, Jinggangshan University, Ji'an 343009, China
| | - Lingling Rong
- School of Life Science, Jinggangshan University, Ji'an 343009, China
| | - Xiaoyu Xiao
- School of Life Science, Jinggangshan University, Ji'an 343009, China
| | - Xiangfeng Huang
- College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China.
| | - Xiaoming Zou
- School of Life Science, Jinggangshan University, Ji'an 343009, China; Ji'an Key Laboratory of Red Soil Improvement and Sustainable Utilization, Ji'an 343009, China.
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17
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Start-up Strategies for Anaerobic Ammonia Oxidation (Anammox) in In-Situ Nitrogen Removal from Polluted Groundwater in Rare Earth Mining Areas. SUSTAINABILITY 2021. [DOI: 10.3390/su13084591] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
The tremendous input of ammonium and rare earth element (REE) ions released by the enormous consumption of (NH4)2SO4 in in situ leaching for ion-adsorption RE mining caused serious ground and surface water contamination. Anaerobic ammonium oxidation (anammox) was a sustainable in situ technology that can reduce this nitrogen pollution. In this research, in situ, semi in situ, and ex situ method of inoculation that included low-concentration (0.02 mg·L−1) and high-concentration (0.10 mg·L−1) lanthanum (La)(III) were adopted to explore effective start-up strategies for starting up anammox reactors seeded with activated sludge and anammox sludge. The reactors were refrigerated for 30 days at 4 °C to investigate the effects of La(III) during a period of low-temperature. The results showed that the in situ and semi in situ enrichment strategies with the addition of La(III) at a low-concentration La(III) addition (0.02 mg·L−1) reduced the length of time required to reactivate the sludge until it reached a state of stable anammox activity and high nitrogen removal efficiency by 60–71 days. The addition of La(III) promoted the formation of sludge floc with a compact structure that enabled it to resist the adverse effects of low temperature and so to maintain a high abundance of AnAOB and microbacterial community diversity of sludge during refrigeration period. The addition of La(III) at a high concentration caused the cellular percentage of AnAOB to decrease from 54.60 ± 6.19% to 17.35 ± 6.69% during the enrichment and reduced nitrogen removal efficiency to an unrecoverable level to post-refrigeration.
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18
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Ma L, Yang L, Liu W, Zhang Y, Zhou Q, Wu Z, He F. Environmental factors and microbial communities jointly regulate biological dephosphorization process in pond-ditch circulation systems (PDCSs) for rural wastewater treatment. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 758:143629. [PMID: 33243515 DOI: 10.1016/j.scitotenv.2020.143629] [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: 08/07/2020] [Revised: 10/30/2020] [Accepted: 11/07/2020] [Indexed: 06/11/2023]
Abstract
Pond-ditch circulation systems (PDCSs) were proved to be an appropriate operation selection in rural wastewater remediation. However, the biological dephosphorization process has not been investigated and quantified in PDCSs. In this study, PDCSs exhibited higher total phosphorus (TP) removal efficiencies (77.8%-97.4%). The activities of polyphosphate kinase (PPK) and exopolyphosphatase (PPX) tightly associated with phosphorus biological removal ranged from 0.356 to 11.844 μmol hydroxamic acid min-1 mg-1 protein, and 0.008 to 0.446 μmol p-nitrophenol min-1 mg-1 protein, respectively. Both PPK and PPX in PDCSs increased with time, peaked at day 30, and then declined, and were negatively correlated with sediment total phosphorus (STP), sediment inorganic phosphorus (SIP), P bound to Al/Fe/Mn oxides and hydroxides (NaOH-P), P associated with Ca (HCl-P), and organic matter (OM) (p < 0.05). Results of high-throughput sequencing suggested that Bacillus (0.46%-19.77%) and Clostridium (0.40%-21.0%) genus might be the predominant groups in phosphorus aerobic biological absorption; while Geobacter (0.15%-4.74%) and Arthrobacter (0.03%-4.01%) genus dominated in anaerobic biological process. The RDA results showed that compared to the ditch, temperature (W-temp), TP, dissolved oxygen (DO), NaOH-P, and OM had stronger effects on microbial community structures in two ponds at day 30 than those at days 14 and 60. Path analysis further indicated that STP could impact PPK and PPX activities in PDCSs both directly and indirectly via altering the relative abundances of bacteria taxa. We found that the indirect effects of W-temp, DO, and OM on PPK and PPX activities mediated through modulating the relative abundances of bacteria taxa and STP. Our findings provide evidences that biological dephosphorization process in PDCSs are jointly modulated by environmental factors and microbial communities. The less-studied W-temp, DO, STP, and OM modulating the relative abundances of bacteria taxa was an existing but previously underestimated indirect pathway influencing on biological dephosphorization process in PDCSs.
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Affiliation(s)
- Lin Ma
- CAS Key Laboratory of Aquatic Botany and Watershed Ecology, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan 430074, China; State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China; Hubei Key Laboratory of Wetland Evolution & Ecological Restoration, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan 430074, China
| | - Lingli Yang
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Wei Liu
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Yi Zhang
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China
| | - Qiaohong Zhou
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China
| | - Zhenbin Wu
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China
| | - Feng He
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China.
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Al-Zaban MI, Mahmoud MA, AlHarbi MA. Catalytic degradation of methylene blue using silver nanoparticles synthesized by honey. Saudi J Biol Sci 2021; 28:2007-2013. [PMID: 33732087 PMCID: PMC7938139 DOI: 10.1016/j.sjbs.2021.01.003] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2020] [Revised: 01/05/2021] [Accepted: 01/05/2021] [Indexed: 11/30/2022] Open
Abstract
This investigation displayed the good catalytic activity of silver nanoparticles (AgNPs) on the reduction of methylene blue dye. During this work, Honey was chosen for environmentally reducing and stabilizing agents for preparation of silver nanoparticles then characterized these nanoparticles by ultraviolet-visible spectroscopy (UV-Vis), functional biomolecules were confirmed by Fourier transform infrared spectroscopy (FTIR). Via transmission electron microscopy (TEM), the size and shape of silver nanoparticles revealed that the particles are spherical and monodispersed without major agglomeration, the particle size ranging from 5 to 25 nm, in addition, the largest particle density levels are 5-10 nm, ZETA Seizers studied the size distribution of the colloidal solution. UV/Vis spectrophotometer and HPLC were used to study and analyze the degradation performance of silver nanoparticles on methylene blue. The results show that 92% of methylene blue has been degraded after 72 h. additionally, several new peaks have appeared after treatment of the samples by using HPLC.
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Affiliation(s)
- Mayasar I. Al-Zaban
- Biology Department, College of Science, Princess Nourah Bint Abdulrahman University, Riyadh 11671, Saudi Arabia
| | - Mohamed A. Mahmoud
- Molecular Markers Laboratory, Plant Pathology Research Institute, Agricultural Research Center, Giza 12619, Egypt
| | - Maha A. AlHarbi
- Biology Department, College of Science, Princess Nourah Bint Abdulrahman University, Riyadh 11671, Saudi Arabia
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20
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Zhang B, Li Y, Fei Y, Cheng Y. Novel Pathway for Vanadium(V) Bio-Detoxification by Gram-Positive Lactococcus raffinolactis. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2021; 55:2121-2131. [PMID: 33492933 DOI: 10.1021/acs.est.0c07442] [Citation(s) in RCA: 81] [Impact Index Per Article: 27.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Whereas prospects of bioremediation for a vanadium(V) [V(V)]-contaminated environment are widely recognized, reported functional species are extremely limited, with the vast majority of Gram-negative bacteria in Proteobacteria. Herein, the effectiveness of V(V) reduction is proved for the first time by Lactococcus raffinolactis, a Gram-positive bacterium in Firmicutes. The V(V) removal efficiency was 86.5 ± 2.17% during 10-d operation, with an average removal rate of 4.32 ± 0.28 mg/L·d in a citrate-fed system correspondingly. V(V) was bio-reduced to insoluble vanadium(IV) and distributed both inside and outside the cells. Nitrite reductase encoded by gene nirS mainly catalyzed intracellular V(V) reduction, revealing a previously unrecognized pathway. Oxidative stress induced by reactive oxygen species from dissimilatory V(V) reduction was alleviated through strengthened superoxide dismutase and catalase activities. Extracellular polymeric substances with chemically reactive hydroxyl (-OH) and carboxyl (-COO-) groups also contributed to V(V) binding and reduction as well as ROS scavenging. This study can improve the understanding of Gram-positive bacteria for V(V) bio-detoxification and offer microbial resources for bioremediation of a V(V)-polluted environment.
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Affiliation(s)
- Baogang Zhang
- School of Water Resources and Environment, MOE Key Laboratory of Groundwater Circulation and Environmental Evolution, China University of Geosciences (Beijing), Beijing 100083, P. R. China
| | - Yi'na Li
- School of Water Resources and Environment, MOE Key Laboratory of Groundwater Circulation and Environmental Evolution, China University of Geosciences (Beijing), Beijing 100083, P. R. China
| | - Yangmei Fei
- School of Water Resources and Environment, MOE Key Laboratory of Groundwater Circulation and Environmental Evolution, China University of Geosciences (Beijing), Beijing 100083, P. R. China
| | - Yutong Cheng
- School of Water Resources and Environment, MOE Key Laboratory of Groundwater Circulation and Environmental Evolution, China University of Geosciences (Beijing), Beijing 100083, P. R. China
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21
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Li K, Qian J, Wang P, Wang C, Lu B, Jin W, He X, Tang S, Zhang C, Gao P. Effects of aging and transformation of anatase and rutile TiO 2 nanoparticles on biological phosphorus removal in sequencing batch reactors and related toxic mechanisms. JOURNAL OF HAZARDOUS MATERIALS 2020; 398:123030. [PMID: 32492616 DOI: 10.1016/j.jhazmat.2020.123030] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/23/2020] [Revised: 05/22/2020] [Accepted: 05/22/2020] [Indexed: 06/11/2023]
Abstract
The effect of nanomaterials aging, namely the transformation of comprehensive characteristics after experiencing real or complex environmental behaviors, on their ecotoxicology is still lacking. Moreover, the mechanisms by which NPs influence biological phosphorus (P) removal during sewage treatment require further elucidation. Therefore, we used both pristine and aged anatase (TiO2-A) and rutile (TiO2-R) NPs to investigate the mechanisms by which NPs affect P removal in a SBR. At 0.1 mg/L, the four types of NPs (pristine and aged) had no significant effect on sludge purification after acute (72-h) exposure under simulated sunlight. However, at 50 mg/L-regardless of the crystalline phase of the NPs-SOP and COD removal efficiency dropped steeply to approximately 42.2-82.4 % (p < 0.05) and 69.8-83.3 % (p < 0.05), respectively, especially in the pristine TiO2-NPs groups because of decrease of richness and diversity of genus level of PAOs and enzyme activity of both PPK and PPX, and the sluggish transformation of PHA and glycogen. Aging reduced the ability of NPs toxicity. The toxicity mechanisms of TiO2-NPs included lipid peroxidation and contact damage, or leakage from bacterial cytoplasmic membrane, which are closely related to photooxidation capacity and aqueous solution stability-i.e., nanoscale effects-and the impacts of aging or inclusion.
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Affiliation(s)
- Kun Li
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, Hohai University, Nanjing, 210098, People's Republic of China; College of Environment, Hohai University, Nanjing, 210098, People's Republic of China
| | - Jin Qian
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, Hohai University, Nanjing, 210098, People's Republic of China; College of Environment, Hohai University, Nanjing, 210098, People's Republic of China.
| | - Peifang Wang
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, Hohai University, Nanjing, 210098, People's Republic of China; College of Environment, Hohai University, Nanjing, 210098, People's Republic of China.
| | - Chao Wang
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, Hohai University, Nanjing, 210098, People's Republic of China; College of Environment, Hohai University, Nanjing, 210098, People's Republic of China
| | - Bianhe Lu
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, Hohai University, Nanjing, 210098, People's Republic of China; College of Environment, Hohai University, Nanjing, 210098, People's Republic of China
| | - Wen Jin
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, Hohai University, Nanjing, 210098, People's Republic of China; College of Environment, Hohai University, Nanjing, 210098, People's Republic of China
| | - Xixian He
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, Hohai University, Nanjing, 210098, People's Republic of China; College of Environment, Hohai University, Nanjing, 210098, People's Republic of China
| | - Sijing Tang
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, Hohai University, Nanjing, 210098, People's Republic of China; College of Environment, Hohai University, Nanjing, 210098, People's Republic of China
| | - Chao Zhang
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, Hohai University, Nanjing, 210098, People's Republic of China; College of Environment, Hohai University, Nanjing, 210098, People's Republic of China
| | - Pan Gao
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, Hohai University, Nanjing, 210098, People's Republic of China; College of Environment, Hohai University, Nanjing, 210098, People's Republic of China
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22
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Responses of Anammox Granular Sludge to Long-Term Rare Earth Element Feeding: Lanthanum as a Case. SUSTAINABILITY 2020. [DOI: 10.3390/su12197887] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
A tremendous input of ammonium and rare earth elements (REEs) has entered the surroundings on account of the discharge and leak of leaching agents during rare earth in-suit leaching mining, which has threatened various organisms. Anammox has the potential to release nitrogen contamination, but the potential impacts of REEs on anammox bacteria remain unclear. In this study, La (III) was chosen as a case to explore the long-term impacts on anammox granular sludge. The 5 mg L−1 La (III) which was examined hardly affected the anammox granulates because of the defense of extracellular polymeric substances. The high La concentrations (10–50 mg L−1) caused intercellular accumulation and the significant inhibition of nitrogen removal performance and dehydrogenase activity, especially a decrease in the relative abundance of Ca. Kuenenia. Moreover, it also induced patently oxidative damage and affected cell membrane integrity. Notably, extracellular polymeric substances have a limited defense capability; neither La3+ nor Ca2+/Mg2+ efflux-related genes aggravated the intracellular accumulation of La.
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23
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Xu Q, Liu X, Yang G, Wang D, Wu Y, Li Y, Huang X, Fu Q, Wang Q, Liu Y, Li X, Yang Q. Norfloxacin-induced effect on enhanced biological phosphorus removal from wastewater after long-term exposure. JOURNAL OF HAZARDOUS MATERIALS 2020; 392:122336. [PMID: 32105958 DOI: 10.1016/j.jhazmat.2020.122336] [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: 09/28/2019] [Revised: 02/02/2020] [Accepted: 02/15/2020] [Indexed: 06/10/2023]
Abstract
In this study, long-term experiments were performed under synthetic wastewater conditions to evaluated the potential impacts of norfloxacin (NOR) (10, 100 and 500 μg/L) on enhanced biological phosphorus removal (EBPR). Experimental result showed that long-term exposure to 10 μg/L NOR induced negligible effects on phosphorus removal. The presence of 100 μg/L NOR slightly decreased phosphorus removal efficiency to 94.41 ± 1.59 %. However, when NOR level further increased to 500 μg/L, phosphorus removal efficiency was significantly decreased from 97.96 ± 0.8 5% (control) to 82.33 ± 3.07 %. The mechanism study revealed that the presence of 500 μg/L NOR inhibited anaerobic phosphorus release and acetate uptake as well as aerobic phosphorus uptake during long-term exposure. It was also found that 500 μg/L NOR exposure suppressed the activity of key enzymes related to phosphorus removal but promoted the transformations of intracellular polyhydroxyalkanoate and glycogen. Microbial analysis revealed that that the presence of 500 μg/L NOR reduced the abundances of polyphosphate accumulating organisms but increased glycogen accumulating organisms, as compared the control.
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Affiliation(s)
- Qiuxiang Xu
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China.
| | - Xuran Liu
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China
| | - Guojing Yang
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China; College of Biological and Environmental Sciences, Zhejiang Wanli University, Ningbo 315100, PR China
| | - Dongbo Wang
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China.
| | - Yanxin Wu
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China
| | - Yifu Li
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China
| | - Xiaoding Huang
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China
| | - Qizi Fu
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China
| | - Qilin Wang
- Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology Sydney, Sydney, NSW 2007, Australia
| | - Yiwen Liu
- Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology Sydney, Sydney, NSW 2007, Australia
| | - Xiaoming Li
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China.
| | - Qi Yang
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China
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24
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Mo F, Li H, Li Y, Cui W, Wang M, Li Z, Chai R, Wang H. Toxicity of Ag + on microstructure, biochemical activities and genic material of Trifolium pratense L. seedlings with special reference to phytoremediation. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2020; 195:110499. [PMID: 32208213 DOI: 10.1016/j.ecoenv.2020.110499] [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: 12/27/2019] [Revised: 02/16/2020] [Accepted: 03/16/2020] [Indexed: 06/10/2023]
Abstract
The objective of this research was to evaluate Ag+ toxicity in Trifolium pratense L. seedlings subjected to increasing doses of Ag+ by determining photosynthetic pigment and malondialdehyde (MDA) contents, microstructure and hereditary substance alterations, changes in activities of antioxidase-superoxide dismutase (SOD), peroxidase (POD) and catalase (CAT) as well as the content of total Ag absorbed in vivo with evaluation of root growth. Doses of approximately 80 mg L-1 Ag+ severely affected photosynthetic efficiency in Trifolium pratense L. seedlings promoted by damages in photosynthetic apparatus evidenced by downward trend in photosynthetic pigment contents and obvious chlorosis. Alterations in enzymatic activity, lipid peroxidation, genic material damage and the presence of Ag+in vivo had impacted on photosynthetic machinery as well. A hormesis effect was observed at 60 mg L-1 Ag+ for the photosynthetic pigments and antioxidase for Trifolium pratense L. seedlings. Tissue changes (i.e., roots, stems and leaves) observed in fluorescence microscope with obvious chlorosis, roots blackening and formation of agglomerated black particles, were related to the lesion promoted by excessive ROS in vivo. Asynchronous change of antioxidase activity corresponded to the alteration in the MDA content, indicating the synchronization in the elimination of ROS. The changes occurred in RAPD profiles of treated samples following Ag+ toxicity containing loss of normal bands, appearance of new bands and variation in band intensity compared to the normal plants with a dose-dependent effect. On average, the roots of Trifolium pratense L. immobilized 92.20% of the total Ag absorbed as a metal exclusion response. Root growth was significantly sensitive to Ag+ stress with obvious hormesis, which corresponded to the changes in Ag uptake, demonstrating the functional alterations in plants. To sum up, we suggest that modulating the genotype of Trifolium pratense L. seedlings to bear higher proportion of pollutants is conducive to contamination site treatment.
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Affiliation(s)
- Fan Mo
- School of Resources and Civil Engineering, Northeastern University, 11 Wenhua Road, Heping District, Shenyang, 110819, China.
| | - Haibo Li
- School of Resources and Civil Engineering, Northeastern University, 11 Wenhua Road, Heping District, Shenyang, 110819, China.
| | - Yinghua Li
- School of Resources and Civil Engineering, Northeastern University, 11 Wenhua Road, Heping District, Shenyang, 110819, China.
| | - Weina Cui
- Institute of Applied Ecology, Chinese Academy of Sciences Shenyang Branch, Shenyang, 110819, China.
| | - Mingshuai Wang
- School of Resources and Civil Engineering, Northeastern University, 11 Wenhua Road, Heping District, Shenyang, 110819, China.
| | - Zhe Li
- School of Resources and Civil Engineering, Northeastern University, 11 Wenhua Road, Heping District, Shenyang, 110819, China; School of Resources and Civil Engineering, Northeastern University, 11 Wenhua Road, Heping District, Shenyang, 110819, China.
| | - Rui Chai
- School of Resources and Civil Engineering, Northeastern University, 11 Wenhua Road, Heping District, Shenyang, 110819, China.
| | - Hongxuan Wang
- School of Resources and Civil Engineering, Northeastern University, 11 Wenhua Road, Heping District, Shenyang, 110819, China.
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25
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Huang J, Xiao J, Guo Y, Guan W, Cao C, Yan C, Wang M. Long-term effects of silver nanoparticles on performance of phosphorus removal in a laboratory-scale vertical flow constructed wetland. J Environ Sci (China) 2020; 87:319-330. [PMID: 31791505 DOI: 10.1016/j.jes.2019.07.012] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2019] [Revised: 07/17/2019] [Accepted: 07/18/2019] [Indexed: 06/10/2023]
Abstract
Silver nanoparticles (AgNPs) have been widely used in many fields, which raised concerns about potential threats to biological sewage treatment systems. In this study, the phosphorus removal performance, enzymatic activity and microbial population dynamics in constructed wetlands (CWs) were evaluated under a long-term exposure to AgNPs (0, 50, and 200 μg/L) for 450 days. Results have shown that AgNPs inhibited the phosphorus removal efficiency in a short-term exposure, whereas caused no obviously negative effects from a long-term perspective. Moreover, in the coexisting CW system of AgNPs and phosphorus, competition exhibited in the initial exposure phase, however, cooperation between them was observed in later phase. Enzymatic activity of acid-phosphatase at the moderate temperature (10-20°C) was visibly higher than that at the high temperature (20-30°C) and CWs with AgNPs addition had no appreciable differences compared with the control. High-throughput sequencing results indicated that the microbial richness, diversity and composition of CWs were distinctly affected with the extension of exposure time at different AgNPs levels. However, the phosphorus removal performance of CWs did not decline with the decrease of polyphosphate accumulating organisms (PAOs), which also confirmed that adsorption precipitation was the main way of phosphorus removal in CWs. The study suggested that AgNPs and phosphorus could be removed synergistically in the coexistence system. This work has some reference for evaluating the influences of AgNPs on the phosphorus removal and the interrelation between them in CWs.
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Affiliation(s)
- Juan Huang
- School of Civil Engineering, Southeast University, Nanjing 211189, China.
| | - Jun Xiao
- School of Civil Engineering, Southeast University, Nanjing 211189, China
| | - Yang Guo
- Security Support Center for Urban Water Supply of Jiangsu Province, Nanjing 210036, China
| | - Wenzu Guan
- School of Civil Engineering, Southeast University, Nanjing 211189, China
| | - Chong Cao
- School of Civil Engineering, Southeast University, Nanjing 211189, China
| | - Chunni Yan
- School of Civil Engineering, Southeast University, Nanjing 211189, China
| | - Mingyu Wang
- School of Civil Engineering, Southeast University, Nanjing 211189, China
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26
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Alizadeh S, Abdul Rahim A, Guo B, Hawari J, Ghoshal S, Comeau Y. Impacts of Continuous Inflow of Low Concentrations of Silver Nanoparticles on Biological Performance and Microbial Communities of Aerobic Heterotrophic Wastewater Biofilm. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2019; 53:9148-9159. [PMID: 31294965 DOI: 10.1021/acs.est.9b01214] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Attached-growth wastewater processes are currently used in water resource recovery facilities (WRRFs) for required upgrades due to an increase in influent loading or to reach more stringent discharge criteria. Yet, the distribution and long-term inhibitory effects of silver nanoparticles (AgNPs) in attached-growth biological wastewater processes and their impact on involved microbial communities are poorly understood at relevant, low concentrations. Retention, distribution, and long-term inhibitory effect of polyvinylpyrrolidone (PVP)-coated AgNPs were evaluated in bench-scale moving bed biofilm reactors (MBBRs), achieving soluble organic matter removal, over a 64 day exposure to nominal concentrations of 10 and 100 μg/L. Distributions of continuously added AgNPs were characterized in the influent, bioreactor, and effluent of MBBRs using single particle inductively coupled plasma mass spectroscopy (spICP-MS). Aerobic heterotrophic biofilms in MBBRs demonstrated limited retention capacity for AgNPs over long-term exposure, with release of AgNPs, and Ag-rich biofilm sloughed from the carriers. Continuous exposure to both influent AgNP concentrations significantly decreased soluble chemical oxygen demand (SCOD) removal efficiency (11% to 31%) and reduced biofilm viability (8% to 30%). Specific activities of both intracellular dehydrogenase (DHA) and extracellular α-glucosidase (α-Glu) and protease (PRO) enzymes were significantly inhibited (8% to 39%) with an observed NP dose-dependent intracellular reactive oxygen species (ROS) production and shift in biofilm microbial community composition by day 64. Our results indicated that long-term exposure to AgNPs in biofilm processes at environmentally relevant concentrations can impact the treatment process stability and the quality of the discharged effluent.
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Affiliation(s)
- Sanaz Alizadeh
- Department of Civil, Geological and Mining Engineering , Polytechnique Montreal , 2500 Polytechnique road , Montreal ( Quebec ) Canada H3T 1J4
| | - Arshath Abdul Rahim
- Department of Civil Engineering , McGill University , 817 Sherbrooke Street West , Montreal ( Quebec ) Canada H3A 0C3
| | - Bing Guo
- Department of Civil Engineering , McGill University , 817 Sherbrooke Street West , Montreal ( Quebec ) Canada H3A 0C3
| | - Jalal Hawari
- Department of Civil, Geological and Mining Engineering , Polytechnique Montreal , 2500 Polytechnique road , Montreal ( Quebec ) Canada H3T 1J4
| | - Subhasis Ghoshal
- Department of Civil Engineering , McGill University , 817 Sherbrooke Street West , Montreal ( Quebec ) Canada H3A 0C3
| | - Yves Comeau
- Department of Civil, Geological and Mining Engineering , Polytechnique Montreal , 2500 Polytechnique road , Montreal ( Quebec ) Canada H3T 1J4
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27
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Huang J, Xiao J, Chen M, Cao C, Yan C, Ma Y, Huang M, Wang M. Fate of silver nanoparticles in constructed wetlands and its influence on performance and microbiome in the ecosystems after a 450-day exposure. BIORESOURCE TECHNOLOGY 2019; 281:107-117. [PMID: 30807995 DOI: 10.1016/j.biortech.2019.02.013] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/11/2018] [Revised: 01/31/2019] [Accepted: 02/04/2019] [Indexed: 05/25/2023]
Abstract
Great controversy still exists on the ecological effects of silver nanoparticles (AgNPs) especially at relatively low concentrations. The performance, fate of AgNPs and microbiome in CWs were evaluated under a long-term exposure to AgNPs (0, 50 and 200 µg/L) for 450 days. Results showed that AgNPs (50, 200 µg/L) caused no obviously negative effects on COD removal whereas nitrogen and phosphorus removals were slightly stimulated. AgNPs could be removed efficiently from wastewater attributed to the accumulations of soil and plant tissues. Mass balance of AgNPs was analysed and soil layer of CWs was the major sink of nanoparticles. High-throughput sequencing further revealed the impact of AgNPs on the ecological structure of CWs. Moreover, the presence of AgNPs altered the relative abundances of key functional bacteria. The ecological risks of persistent exposure to low concentrations AgNPs should not be ignored, even though it did not result in deterioration of the CWs' operating performance in our studies.
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Affiliation(s)
- Juan Huang
- School of Civil Engineering, Southeast University, Nanjing, Jiangsu 211189, PR China.
| | - Jun Xiao
- School of Civil Engineering, Southeast University, Nanjing, Jiangsu 211189, PR China
| | - Ming Chen
- Nanjing Research Institute of Environmental Protection, Nanjing, Jiangsu 210042, PR China
| | - Chong Cao
- School of Civil Engineering, Southeast University, Nanjing, Jiangsu 211189, PR China
| | - Chunni Yan
- School of Civil Engineering, Southeast University, Nanjing, Jiangsu 211189, PR China
| | - Yixuan Ma
- School of Civil Engineering, Southeast University, Nanjing, Jiangsu 211189, PR China
| | - Minjie Huang
- School of Civil Engineering, Southeast University, Nanjing, Jiangsu 211189, PR China
| | - Mingyu Wang
- School of Civil Engineering, Southeast University, Nanjing, Jiangsu 211189, PR China
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28
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Li H, Chi Z, Yan B. Long-term impacts of graphene oxide and Ag nanoparticles on anammox process: Performance, microbial community and toxic mechanism. J Environ Sci (China) 2019; 79:239-247. [PMID: 30784446 DOI: 10.1016/j.jes.2018.07.012] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2018] [Revised: 07/16/2018] [Accepted: 07/19/2018] [Indexed: 06/09/2023]
Abstract
The increasing application of engineered nanoparticles (NPs) has posed an emerging challenge to constructed wetland wastewater treatment. The performance, microbial community and toxic mechanism of anammox-based unplanted subsurface-flow constructed wetlands (USFCWs) were investigated under the long-term exposure of different graphene oxides (GOs) and Ag NP concentrations. Results showed that the addition of GO could promote TN removal, manifesting as function anammox bacteria C. Anammoxoglobus having a relative high abundance, for GO did not cause significant damage to the cell integrity though there was an increase in ROS concentrations. TN removal would not be obviously affected under exposure of 1 mg/L Ag NPs, for the function gene related to cell biogenesis and repair was up-regulated; while the addition of 10 mg/L Ag NPs would have an inhibiting effect on TN removal in the USFCWs, for the disappearance of some species having anammox ability. Key enzymes of anammox process (NIR and HDH) decreased to some extent under GO and Ag NP exposure, and function gene of defense mechanisms had an increase trend in samples.
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Affiliation(s)
- Huai Li
- Key Laboratory of Wetland Ecology and Environment, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun 130102, China
| | - Zifang Chi
- Key Laboratory of Groundwater Resources and Environment, Ministry of Education, Jilin University, Changchun 130021, China.
| | - Baixing Yan
- Key Laboratory of Wetland Ecology and Environment, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun 130102, China
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29
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Wu S, Wu H, Button M, Konnerup D, Brix H. Impact of engineered nanoparticles on microbial transformations of carbon, nitrogen, and phosphorus in wastewater treatment processes - A review. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 660:1144-1154. [PMID: 30743910 DOI: 10.1016/j.scitotenv.2019.01.106] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/12/2018] [Revised: 01/07/2019] [Accepted: 01/10/2019] [Indexed: 06/09/2023]
Abstract
Concern regarding the potential negative impacts of released engineered nanoparticles (ENPs) on pollutant removal performance of wastewater treatment systems has received booming attention in recent years. However, the conclusions drawn from different studies often lead to fragmented overall knowledge, some of which are even contradictory. This scenario shows the necessity for a comprehensive review of the interactions of ENPs in wastewater treatment systems, particularly on the impacts of ENPs on microbial processes of carbon (C), nitrogen (N), and phosphorus (P) removal in water treatment systems. This review introduced the impact of 6 often reported ENPs in 5 types of treatment systems. We found that exposure to most of the investigated ENPs at low concentrations doesn't adversely influence the growth of the heterotrophic microbes, which are responsible for organic matter removal. The impacts of ENPs on various microbial nitrogen transformation processes have been investigated. Dosing of ENPs often causes acute microbial nitrogen removal inhibition at various concentrations, but does not influence long-term operation due to microbial adaption. No significant negative effects on biological phosphorus removal in different wastewater treatment processes have been reported after both short-term and long-term exposure (except copper nanoparticles). Environmentally relevant concentrations of ENPs have been reported to enhance the photosynthetic capacity of wetland plants, whereas chronic inhibition to photosynthesis was found in exposure to high concentrations of ENPs. Inhibition effects are often overestimated in pure cultivated toxicity test assays compared to testing with artificially prepared wastewater containing various ingredients or with real wastewater. Potential ligands in real wastewater can bind with ENPs and lower their dissolution. Some challenges exist regarding detection and quantification techniques of ENPs at environmental concentrations, modeling of engineered nanomaterial release on a worldwide scale, and inhibitory mechanisms to microbial transformations.
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Affiliation(s)
- Shubiao Wu
- Aarhus Institute of Advanced Studies, Aarhus University, Aarhus 8000C, Denmark; Department of Bioscience, Aarhus University, Aarhus 8000C, Denmark.
| | - Haiming Wu
- College of Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, PR China
| | - Mark Button
- Department of Earth and Environmental Sciences, University of British Columbia - Okanagan, Kelowna, British Columbia, Canada
| | - Dennis Konnerup
- Aarhus Institute of Advanced Studies, Aarhus University, Aarhus 8000C, Denmark; Department of Bioscience, Aarhus University, Aarhus 8000C, Denmark
| | - Hans Brix
- Department of Bioscience, Aarhus University, Aarhus 8000C, Denmark
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30
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Ke M, Qu Q, Peijnenburg WJGM, Li X, Zhang M, Zhang Z, Lu T, Pan X, Qian H. Phytotoxic effects of silver nanoparticles and silver ions to Arabidopsis thaliana as revealed by analysis of molecular responses and of metabolic pathways. THE SCIENCE OF THE TOTAL ENVIRONMENT 2018; 644:1070-1079. [PMID: 30743820 DOI: 10.1016/j.scitotenv.2018.07.061] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/27/2018] [Revised: 07/02/2018] [Accepted: 07/05/2018] [Indexed: 06/09/2023]
Abstract
The acute (3 days) and chronic (whole life history) responses of Arabidopsis thaliana following exposure to silver nanoparticles (AgNPs) and Ag+ ions (AgNO3) in respectively a hydroponic medium and in soil were studied. After 3 days of hydroponic exposure, AgNPs (1.0 and 2.5 mg/L) exerted more severe inhibitory effects on plant (shoot and root) growth and photosynthesis than the same concentrations of Ag+ ions. In soil cultivation, the photoperiod, the autonomous, and the vernalization pathways were down-regulated to 0.15- to 0.5-fold of the control after 12.5 mg/kg AgNPs treatment. This exposure caused a decrease of approximately 25%-40% as compared to the control of the transcription of flowering key genes including AP1, LFY, FT and SOC1, and finally resulted in a delayed flowering time of 5 days. Only autonomous and vernalization pathways were inhibited by Ag+ ion treatment and ultimately the time of flowering in treated plants was delayed by 3 days. The energy production related metabolic pathways in the tricarboxylic acid cycle and in sugar metabolism were stimulated stronger by AgNPs than by Ag+ ion treatment, thus releasing more energy and accelerating the physiological metabolic responses against stress in the AgNPs treatment while subsequently reducing the plant growth and yield at the maturation stage. Importantly, shikimate-phenylpropanoid biosynthesis, and tryptophan and galactose metabolisms were regulated only by the AgNPs treatment, which was a specific effect of nanoparticles. This work provides a systematic understanding at the molecular, physiological as well as metabolic level of the effects of AgNPs and Ag+ ions in A. thaliana.
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Affiliation(s)
- Mingjing Ke
- College of Environment, Zhejiang University of Technology, Hangzhou, PR China
| | - Qian Qu
- College of Environment, Zhejiang University of Technology, Hangzhou, PR China
| | - W J G M Peijnenburg
- Institute of Environmental Sciences (CML), Leiden University, 2300 RA Leiden, The Netherlands; National Institute of Public Health and the Environment (RIVM), Center for Safety of Substances and Products, P.O. Box 1, Bilthoven, The Netherlands
| | - Xingxing Li
- College of Environment, Zhejiang University of Technology, Hangzhou, PR China
| | - Meng Zhang
- College of Environment, Zhejiang University of Technology, Hangzhou, PR China
| | - Zhenyan Zhang
- College of Environment, Zhejiang University of Technology, Hangzhou, PR China
| | - Tao Lu
- College of Environment, Zhejiang University of Technology, Hangzhou, PR China
| | - Xiangliang Pan
- College of Environment, Zhejiang University of Technology, Hangzhou, PR China
| | - Haifeng Qian
- College of Environment, Zhejiang University of Technology, Hangzhou, PR China; Xinjiang Key Laboratory of Environmental Pollution and Bioremediation, Chinese Academy of Sciences, Urumqi, PR China.
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31
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Hu Z, Sun P, Han J, Wang R, Jiao L, Yang P, Cai J. The acute effects of erythromycin and oxytetracycline on enhanced biological phosphorus removal system: shift in bacterial community structure. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2018; 25:9342-9350. [PMID: 29344916 DOI: 10.1007/s11356-018-1221-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/28/2017] [Accepted: 01/03/2018] [Indexed: 06/07/2023]
Abstract
Since extensive application, an increasing amount of antibiotics has been released into wastewater treatment plants. In this study, the enhanced biological phosphorus removal (EBPR) system was fed with synthetic wastewater containing erythromycin (ERY) and oxytetracycline (OTC) for 7 days to evaluate the variations of solution ortho-P (SOP), volatile fatty acid (VFA), poly-bhydroxyalkanoates (PHAs), specific oxygen uptake rater (SOUR), and microbial community in the EBPR system. The obtained results showed that the P-removal efficiency decreased to 0.0%, and at the end of the experiment, only less than 20% of the VFA could be consumed. Besides, the variable processes of P and PHAs were destroyed. Moreover, to better grasp the inhibitory mechanism of antibiotics, microbial community compositions of activated sludge sampled in all reactors were investigated by high-throughput sequencing techniques. Results of comparative and evolutionary analysis revealed that high concentrations (5 and 10 mg/L) of ERY and OTC could seriously shift microbial communities, while combined antibiotics could induce more. Additionally, Accumulibacter and Competibacter were two primary microorganisms at the genus level in the EBPR system. Accumulibacter decreased seriously for exposure to antibiotics, while Competibacter increased in all experimental reactors especially in combined antibiotics reactor.
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Affiliation(s)
- Zhetai Hu
- School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou, 310012, China
| | - Peide Sun
- School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou, 310012, China.
| | - Jingyi Han
- School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou, 310012, China
| | - Ruyi Wang
- School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou, 310012, China
| | - Liang Jiao
- School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou, 310012, China
| | - Pengfei Yang
- School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou, 310012, China
| | - Jing Cai
- School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou, 310012, China
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32
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Wu Q, Huang K, Sun H, Ren H, Zhang XX, Ye L. Comparison of the impacts of zinc ions and zinc nanoparticles on nitrifying microbial community. JOURNAL OF HAZARDOUS MATERIALS 2018; 343:166-175. [PMID: 28950204 DOI: 10.1016/j.jhazmat.2017.09.022] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/06/2017] [Revised: 09/11/2017] [Accepted: 09/12/2017] [Indexed: 06/07/2023]
Abstract
To understand the effects of metal ions and nanoparticles (NPs) on nitrifying bacterial communities, this study investigates the impacts of zinc (Zn) NPs, zinc oxide (ZnO) NPs and Zn ions on the nitrifying bacterial communities. Under low Zn concentration (0.1mgL-1), the nitrification rate was promoted by Zn ions and inhibited by the two NPs, indicating that the toxicity of NPs was caused by the NPs themselves instead of the released Zn ions. Further analysis showed that both Zn NPs and ZnO NPs could result in substantial reactive oxygen species (ROS) production in the nitrifying bacteria community. The inhibition was strongly correlated with amoA gene expression, but not with the expression of hao and nxrA genes. These results indicated that the main difference of the Zn ions and Zn NPs on nitrifying bacterial community could be due to the different impacts on the ROS production and amoA gene expression. Collectively, the findings in this study advanced understanding of the different effects of Zn NPs, ZnO NPs and Zn ions on nitrifying bacteria.
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Affiliation(s)
- Qiang Wu
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, China
| | - Kailong Huang
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, China
| | - Haohao Sun
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, China
| | - Hongqiang Ren
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, China
| | - Xu-Xiang Zhang
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, China.
| | - Lin Ye
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, China.
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Chen Z, Lu J, Gao SH, Jin M, Bond PL, Yang P, Yuan Z, Guo J. Silver nanoparticles stimulate the proliferation of sulfate reducing bacterium Desulfovibrio vulgaris. WATER RESEARCH 2018; 129:163-171. [PMID: 29149671 DOI: 10.1016/j.watres.2017.11.021] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/09/2017] [Revised: 11/06/2017] [Accepted: 11/07/2017] [Indexed: 06/07/2023]
Abstract
The intensive use of silver nanoparticles (AgNPs) in cosmetics and textiles causes their release into sewer networks of urban water systems. Although a few studies have investigated antimicrobial activities of nanoparticles against environmental bacteria, little is known about potential impacts of the released AgNPs on sulfate reducing bacteria in sewers. Here, we investigated the effect of AgNPs on Desulfovibrio vulgaris Hidenborough (D. vulgaris), a typical sulfate-reducing bacterium (SRB) in sewer systems. We found AgNPs stimulated the proliferation of D. vulgaris, rather than exerting inhibitory or biocidal effects. Based on flow cytometer detections, both the cell growth rate and the viable cell ratio of D. vulgaris increased during exposure to AgNPs at concentrations of up to 100 mg/L. The growth stimulation was dependent on the AgNP concentration. These results imply that the presence of AgNPs in sewage may affect SRB abundance in sewer networks. Our findings also shed new lights on the interactions of nanoparticles and bacteria.
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Affiliation(s)
- Zhaoyu Chen
- Advanced Water Management Centre, The University of Queensland, St Lucia, Brisbane, QLD 4072, Australia; Department of Environmental Science & Engineering, Sichuan University, Chengdu, Sichuan 610065, China
| | - Ji Lu
- Advanced Water Management Centre, The University of Queensland, St Lucia, Brisbane, QLD 4072, Australia
| | - Shu-Hong Gao
- Advanced Water Management Centre, The University of Queensland, St Lucia, Brisbane, QLD 4072, Australia
| | - Min Jin
- Advanced Water Management Centre, The University of Queensland, St Lucia, Brisbane, QLD 4072, Australia
| | - Philip L Bond
- Advanced Water Management Centre, The University of Queensland, St Lucia, Brisbane, QLD 4072, Australia
| | - Ping Yang
- Department of Environmental Science & Engineering, Sichuan University, Chengdu, Sichuan 610065, China
| | - Zhiguo Yuan
- Advanced Water Management Centre, The University of Queensland, St Lucia, Brisbane, QLD 4072, Australia
| | - Jianhua Guo
- Advanced Water Management Centre, The University of Queensland, St Lucia, Brisbane, QLD 4072, Australia.
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Liu Y, Li X, Zhao J, Wang D, Yang Q, Zeng G. The feasibility of enhanced biological phosphorus removal in the novel oxic/extended idle process using fermentation liquid from sludge fermentation. RSC Adv 2018; 8:3321-3327. [PMID: 35541212 PMCID: PMC9077545 DOI: 10.1039/c7ra12886j] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2017] [Accepted: 01/10/2018] [Indexed: 11/28/2022] Open
Abstract
Carbon sources are essential for biological phosphorus removal (BPR); the carbon sources, however, are often inadequate in municipal wastewater treatment plants. This study demonstrated the feasibility of sludge fermentation liquid enhanced by biosurfactant alkylpolyglycosides (APG) as carbon sources to improve the performance of BPR in the novel oxic/extended idle (O/EI) reactor and the underlying mechanism was also investigated. The results showed that APG induced fermentation liquid could enhance the BPR performance in the O/EI reactor, and the BPR efficiency was 95.2%, which was significantly higher than that in the conventional anaerobic/oxic (A/O) reactor. Mechanism investigation showed that compared with the A/O reactor, the O/EI reactor enriched more polyphosphate accumulating organisms (PAOs) (38.2%), but less glycogen accumulating organisms (GAOs) when the APG-induced fermentation liquid was used as carbon source. The transformations of the polyhydroxyalkanoates (PHA) and glycogen in the O/EI reactor were lower than those in the A/O reactor. Further study found that the activities of polyphosphate kinase (PPK) and acetyl-CoA synthases (ACS) in the O/EI reactor were significantly higher than those of the A/O reactor, which was consistent with the higher BPR efficiency in the O/EI reactor. Long-term effect of fermented liquid as carbon source on effluent COD and SOP in O/EI reactor.![]()
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Affiliation(s)
- Yang Liu
- College of Environmental Science and Engineering
- Hunan University
- Changsha 410082
- P. R. China
- Key Laboratory of Environmental Biology and Pollution Control
| | - Xiaoming Li
- College of Environmental Science and Engineering
- Hunan University
- Changsha 410082
- P. R. China
- Key Laboratory of Environmental Biology and Pollution Control
| | - Jianwei Zhao
- College of Environmental Science and Engineering
- Hunan University
- Changsha 410082
- P. R. China
- Key Laboratory of Environmental Biology and Pollution Control
| | - Dongbo Wang
- College of Environmental Science and Engineering
- Hunan University
- Changsha 410082
- P. R. China
- Key Laboratory of Environmental Biology and Pollution Control
| | - Qi Yang
- College of Environmental Science and Engineering
- Hunan University
- Changsha 410082
- P. R. China
- Key Laboratory of Environmental Biology and Pollution Control
| | - Guangming Zeng
- College of Environmental Science and Engineering
- Hunan University
- Changsha 410082
- P. R. China
- Key Laboratory of Environmental Biology and Pollution Control
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35
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Li X, Ke M, Zhang M, Peijnenburg WJGM, Fan X, Xu J, Zhang Z, Lu T, Fu Z, Qian H. The interactive effects of diclofop-methyl and silver nanoparticles on Arabidopsis thaliana: Growth, photosynthesis and antioxidant system. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2018; 232:212-219. [PMID: 28931464 DOI: 10.1016/j.envpol.2017.09.034] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/13/2017] [Revised: 07/31/2017] [Accepted: 09/11/2017] [Indexed: 05/15/2023]
Abstract
Diclofop-methyl (DM), a common post-emergence herbicide, is frequently used in agricultural production. Silver nanoparticles (AgNPs) are one of the most widely used nanoparticles, and as such, have been detected and monitored in several environmental systems. Here we investigated the interactive effects of DM and AgNPs on the physiological morphology, photosynthesis and antioxidant system of Arabidopsis thaliana. Our results demonstrated that a 1.0 mg/L DM treatment had no significant effect on the fresh weight of plant shoots and the content of total chlorophyll and anthocyanin. However, a 0.5 mg/L AgNPs treatment was found to significantly inhibit plant growth and chlorophyll synthesis, and was found to cause more severe oxidative damage in plants compared to the effects observed in a hydroponic suspension in which DM and AgNPs were jointly present. Meanwhile, the relative transcript levels of photosynthesis related genes (psbA, rbcL, pgrl1A and pgrl1B) in the combined group were found to be slightly increased compared to transcript levels in the AgNPs group, in order to maintain ATP generation at relatively normal levels in order to repair light damage. One explanation for these observed antagonistic effects was that the existence of DM affects the stability of AgNPs and reduced Ag+ release from AgNPs in the mixed solution. Thereupon, the Ag+-content was found to decrease in shoots and roots in the combined group by 15.2% and 9.4% respectively, compared to the AgNPs group. The coexistence of herbicides and nanomaterials in aquatic environments or soil systems will continue to exist due to their wide usages. Our current study highlights that the antagonistic effects between DM and AgNPs exerted a positive impact on A. thaliana growth.
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Affiliation(s)
- Xingxing Li
- Department of Food Science and Technology, Zhejiang University of Technology, Hangzhou 310032, PR China
| | - Mingjing Ke
- College of Environment, Zhejiang University of Technology, Hangzhou 310032, PR China
| | - Meng Zhang
- College of Environment, Zhejiang University of Technology, Hangzhou 310032, PR China
| | - W J G M Peijnenburg
- Institute of Environmental Sciences (CML), Leiden University, 2300 RA Leiden, The Netherlands; National Institute of Public Health and the Environment (RIVM), Center for Safety of Substances and Products, P.O. Box 1, Bilthoven, The Netherlands
| | - Xiaoji Fan
- College of Biotechnological and Bioengineering, Zhejiang University of Technology, Hangzhou 310032, PR China
| | - Jiahui Xu
- Department of Food Science and Technology, Zhejiang University of Technology, Hangzhou 310032, PR China
| | - Zhenyan Zhang
- College of Environment, Zhejiang University of Technology, Hangzhou 310032, PR China
| | - Tao Lu
- College of Environment, Zhejiang University of Technology, Hangzhou 310032, PR China
| | - Zhengwei Fu
- College of Biotechnological and Bioengineering, 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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36
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Xu Q, Li S, Wan Y, Wang S, Ma B, She Z, Guo L, Gao M, Zhao Y, Jin C, Dong J, Li Z. Impacts of silver nanoparticles on performance and microbial community and enzymatic activity of a sequencing batch reactor. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2017; 204:667-673. [PMID: 28950236 DOI: 10.1016/j.jenvman.2017.09.050] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/02/2017] [Revised: 09/14/2017] [Accepted: 09/18/2017] [Indexed: 06/07/2023]
Abstract
The performance, microbial community and enzymatic activity of a sequencing batch reactor (SBR) were evaluated under silver nanoparticles (Ag NPs) stress. Over 5 mg/L Ag NPs inhibited the COD and phosphorus removals, whereas the NH4+ removal kept stable during the whole operational period. The organic matter, nitrogen and phosphorus removal rates were obviously inhibited under Ag NPs stress, which showed similar varying trends with the corresponding microbial enzymatic activities. The change of Ag content in the activated sludge indicated that some Ag NPs were absorbed by the sludge. The presence of Ag NPs promoted the increase of reactive oxygen species (ROS) and lactate dehydrogenase (LDH) of microorganism due to the microbial response to the Ag NPs toxicity, which could impact on the microbial morphology and physiological functions. The presence of Ag NPs could produce some evident changes in the microbial community.
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Affiliation(s)
- Qiaoyan Xu
- Key Lab of Marine Environment and Ecology, Ministry of Education, Ocean University of China, Qingdao, 266100, China; Shandong Provincial Key Laboratory of Marine Environment and Geological Engineering, Ocean University of China, Qingdao, 266100, China
| | - Shanshan Li
- Key Lab of Marine Environment and Ecology, Ministry of Education, Ocean University of China, Qingdao, 266100, China
| | - Yiping Wan
- Key Lab of Marine Environment and Ecology, Ministry of Education, Ocean University of China, Qingdao, 266100, China
| | - Sen Wang
- School of Environmental Science and Engineering, Qingdao University, Qingdao, 266071, China
| | - Bingrui Ma
- Key Lab of Marine Environment and Ecology, Ministry of Education, Ocean University of China, Qingdao, 266100, China
| | - Zonglian She
- Key Lab of Marine Environment and Ecology, Ministry of Education, Ocean University of China, Qingdao, 266100, China
| | - Liang Guo
- Key Lab of Marine Environment and Ecology, Ministry of Education, Ocean University of China, Qingdao, 266100, China
| | - Mengchun Gao
- Key Lab of Marine Environment and Ecology, Ministry of Education, Ocean University of China, Qingdao, 266100, China.
| | - Yangguo Zhao
- Key Lab of Marine Environment and Ecology, Ministry of Education, Ocean University of China, Qingdao, 266100, China
| | - Chunji Jin
- Key Lab of Marine Environment and Ecology, Ministry of Education, Ocean University of China, Qingdao, 266100, China; School of Environmental Science and Engineering, Qingdao University, Qingdao, 266071, China
| | - Junwei Dong
- Key Lab of Marine Environment and Ecology, Ministry of Education, Ocean University of China, Qingdao, 266100, China
| | - Zhiwei Li
- Key Lab of Marine Environment and Ecology, Ministry of Education, Ocean University of China, Qingdao, 266100, China
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37
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Yi K, Wang D, Li X, Chen H, Sun J, An H, Wang L, Deng Y, Liu J, Zeng G. Effect of ciprofloxacin on biological nitrogen and phosphorus removal from wastewater. THE SCIENCE OF THE TOTAL ENVIRONMENT 2017; 605-606:368-375. [PMID: 28668748 DOI: 10.1016/j.scitotenv.2017.06.215] [Citation(s) in RCA: 92] [Impact Index Per Article: 13.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/05/2017] [Revised: 06/17/2017] [Accepted: 06/25/2017] [Indexed: 06/07/2023]
Abstract
In this work, both short-term and long-term experiments were therefore conducted to assess the effects of ciprofloxacin (0.2 and 2mg·L-1) on wastewater nutrient removal. The results showed that both levels of ciprofloxacin had no acute and chronic adverse effects on the surface integrity and viability of activated sludge. Short-term exposure to all the ciprofloxacin levels induced negligible influences on wastewater nutrient removal. However, the prolonged exposure to ciprofloxacin decreased total phosphorus and nitrogen removal efficiencies from 96.8, 95.8% (control) to 91.7, 84.9% (0.2mg·L-1) and 90.5%, 80.2% (2mg·L-1), respectively. The mechanism study showed that ciprofloxacin exposure suppressed denitrification and phosphorus uptake processes. It was also found that ciprofloxacin affected the transformations of intracellular polyhydroxyalkanoates and glycogen in the oxic and anoxic stages. Moreover the activities of nitrite reductase and polyphosphate kinase were inhibited by the presence of ciprofloxacin. Further analysis with high-throughput sequencing revealed that compared with the control, the abundances of polyphosphate accumulating organisms, glycogen accumulating organisms and denitrifying bacteria in ciprofloxacin exposure reactors reduced, which were consistent with the decreased nutrient removal performance measured in these reactors.
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Affiliation(s)
- Kaixin Yi
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China
| | - Dongbo Wang
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China.
| | - Xiaoming Li
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China
| | - Hongbo Chen
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China
| | - Jian Sun
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China
| | - Hongxue An
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China
| | - Liqun Wang
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China
| | - Yongchao Deng
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China
| | - Jun Liu
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China
| | - Guangming Zeng
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China
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38
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Kamika I, Tekere M. Impacts of cerium oxide nanoparticles on bacterial community in activated sludge. AMB Express 2017; 7:63. [PMID: 28299750 PMCID: PMC5352701 DOI: 10.1186/s13568-017-0365-6] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2017] [Accepted: 03/06/2017] [Indexed: 11/10/2022] Open
Abstract
Rapidly developing industry raises concerns about the environmental impacts of nanoparticles, but the effects of inorganic nanoparticles on bacterial community in wastewater treatment remain unclear. The present research assessed the impact of cerium oxide nanoparticles (nCeO) on the microbiome of activated sludge system. The results showed that 18,330 over 28,201 reads generated from control samples were assigned to Proteobacteria while 5527 reads (19.6%), 3260 reads (11.567%), and 719 reads (2.55%) were assigned to unclassified_Bacteria, Firmicutes and Actinobacteria, respectively. When stressed with nCeO2 NPs, a decrease on reads was noted with 53, 48, 27.7 and 24% assigned to Proteobacteria. Gammaproteobacteria (80.57%) was found to be the most predominant Proteobacteria. The impact of nCeO2 NPs was also observed on pollutants removal as only 1.83 and 35.15% of phosphate and nitrate could be removed in the bioreactor stressed with 40 mg-nCeO2-NPs/L. This was confirmed by a drastic reduction of activities for enzymes catalysing denitrification (NaR and NiR) and degradation of polyphosphate (ADK and PPK). ADK appeared to be the most affected enzyme with activity decrease reaching over 90% when stressed with 10 mg-nCeO2/L. Furthermore, bacterial diversity was not significantly different whereas their species richness showed significant difference between control and treated samples. A large number of reads from control samples could not be classified down to the lower taxonomic level "genera" suggesting hitherto vast untapped microbial diversity. The denitrification related genera including Trichococcus and Acinetobacter were found to alternatively dominating treated samples highlighting those nCeO2 NPs could enhance the growth of some bacterial species while inhibiting those of others. Nevertheless, the study indicates that nCeO2 NPs in wastewater at very high concentrations may have some adverse effects on activated sludge process as they inhibit the removal of phosphate.
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Chacana J, Alizadeh S, Labelle MA, Laporte A, Hawari J, Barbeau B, Comeau Y. Effect of ozonation on anaerobic digestion sludge activity and viability. CHEMOSPHERE 2017; 176:405-411. [PMID: 28278429 DOI: 10.1016/j.chemosphere.2017.02.108] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/28/2016] [Revised: 02/16/2017] [Accepted: 02/21/2017] [Indexed: 06/06/2023]
Abstract
The effect of ozonation of anaerobic digested sludge on methane production was studied as a means of increasing the capacity of municipal anaerobic digesters. Ozone doses ranging from 0 to 192 mg O3/g sludge COD were evaluated in batch tests with a bench scale ozonation unit. Ozonation initially, and temporarily, reduced biomass viability and acetoclastic methanogenic activity, resulting in an initial lag phase ranging from 0.8 to 10 days. Following this lag phase, ozonation enhanced methane production with an optimal methane yield attained at 86 mg O3/g COD. Under these conditions, the yield of methane and the rate of its formation were 52% and 95% higher, respectively, than those factors measured without ozonation. A required optimal ozone dose could be feasible to improve the anaerobic digestion performance by increasing the methane production potential with a minimum impact on microbial activity; thus, an optimal ozone dose would enable an increase in the capacity of anaerobic digesters.
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Affiliation(s)
| | | | | | - Antoine Laporte
- Water and Sanitation, Ville de Repentigny, Repentigny, Canada
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40
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Sheng Z, Liu Y. Potential impacts of silver nanoparticles on bacteria in the aquatic environment. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2017; 191:290-296. [PMID: 28129561 DOI: 10.1016/j.jenvman.2017.01.028] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/10/2016] [Revised: 12/12/2016] [Accepted: 01/14/2017] [Indexed: 06/06/2023]
Abstract
It is inevitable that nano-silver will be released into the environment. Therefore, there is an urgent need to better understand the effects of silver nanoparticles (Ag-NPs) on microbes in natural and engineered environments. The most remarkable gap in our knowledge on this lies on the low Ag-NPs dose side. This review summarized studies on the effects of Ag-NPs on bacteria from simple to complicated aquatic systems. A hormetic model with a narrow stimulatory zone has been proposed based on both experimental phenomenon and the potential mechanisms of the observed effects. Spectrum of the stimulating zone depends on Ag-NP properties, bacterial types and environmental conditions tested. This may become a concern in terms of Ag-NP disposal, and further research is required to build a sophisticated toxicity model for Ag-NPs.
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Affiliation(s)
- Zhiya Sheng
- Department of Civil and Environmental Engineering, University of Alberta, Edmonton, AB, T6G 2W2, Canada
| | - Yang Liu
- Department of Civil and Environmental Engineering, University of Alberta, Edmonton, AB, T6G 2W2, Canada.
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41
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Hu Z, Lu X, Sun P, Hu Z, Wang R, Lou C, Han J. Understanding the performance of microbial community induced by ZnO nanoparticles in enhanced biological phosphorus removal system and its recoverability. BIORESOURCE TECHNOLOGY 2017; 225:279-285. [PMID: 27898318 DOI: 10.1016/j.biortech.2016.11.080] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/17/2016] [Revised: 11/18/2016] [Accepted: 11/19/2016] [Indexed: 06/06/2023]
Abstract
In this study, the impacts of ZnO Nanoparticles (NPs) on the microbial community in enhanced biological phosphorus removal (EBPR) system and its recoverability were investigated. High-throughput sequencing was applied to study the microbial community shift. Results show that the species richness in the EBPR system was reduced under the condition of ZnO NPs with high concentration (above 6mg/L). Evolution analysis suggests that higher concentration ZnO NPs induced more microbial community shift. According to the analysis on genus level, Competibacter was more impressionable than Accumulibacter after exposure to 2mg/L ZnO NPs. Nonetheless, this phenomenon could not be found as the concentration of ZnO NPs got higher (above 6mg/L). Accumulibacter could reach to the initial level after recover for 20days, whereas Competibacter could not recover even when the concentration of ZnO NPs was only 2mg/L. Interestingly, although the phosphorus removal (P-removal) process was re-achieved, the microbial community in reactors was irreversible.
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Affiliation(s)
- Zhetai Hu
- School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou 310012, China
| | - Xuanyu Lu
- School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou 310012, China
| | - Peide Sun
- School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou 310012, China.
| | - Zhirong Hu
- School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou 310012, China; GL Environment Inc, Hamilton, Canada
| | - Ruyi Wang
- School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou 310012, China
| | - Chengke Lou
- School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou 310012, China
| | - Jingyi Han
- School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou 310012, China
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42
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Wang S, Liu Z, Wang W, You H. Fate and transformation of nanoparticles (NPs) in municipal wastewater treatment systems and effects of NPs on the biological treatment of wastewater: a review. RSC Adv 2017. [DOI: 10.1039/c7ra05690g] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
Fate, transformation of NPs in WWTP & effects on wastewater treatment.
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Affiliation(s)
- Shutao Wang
- State Key Laboratory of Urban Water Resource and Environment
- Harbin Institute of Technology
- Harbin 150090
- China
| | - Zhisheng Liu
- Changchun Institute of Urban Planning & Design
- Changchun 130033
- China
| | - Weiqing Wang
- State Key Laboratory of Urban Water Resource and Environment
- Harbin Institute of Technology
- Harbin 150090
- China
| | - Hong You
- State Key Laboratory of Urban Water Resource and Environment
- Harbin Institute of Technology
- Harbin 150090
- China
- Weihai 264209
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43
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Huang W, Sun S, Gao Z, Chen Y, Wu L. Acute and chronic effects of roxarsone on biological nitrogen and phosphorus removal and its mechanism. RSC Adv 2017. [DOI: 10.1039/c7ra02561k] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Effect of roxarsone on the removal of nutrients from wastewater.
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Affiliation(s)
- Weijiang Huang
- School of Tropical and Laboratory Medicine
- Hainan Medical University
- Haikou
- P. R. China
| | - Shengjin Sun
- School of Tropical and Laboratory Medicine
- Hainan Medical University
- Haikou
- P. R. China
| | - Zhao Gao
- School of Tropical and Laboratory Medicine
- Hainan Medical University
- Haikou
- P. R. China
| | - Yu Chen
- School of Tropical and Laboratory Medicine
- Hainan Medical University
- Haikou
- P. R. China
| | - Lin Wu
- School of Tropical and Laboratory Medicine
- Hainan Medical University
- Haikou
- P. R. China
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44
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Zhang C, Hu Z, Li P, Gajaraj S. Governing factors affecting the impacts of silver nanoparticles on wastewater treatment. THE SCIENCE OF THE TOTAL ENVIRONMENT 2016; 572:852-873. [PMID: 27542630 DOI: 10.1016/j.scitotenv.2016.07.145] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/26/2016] [Revised: 07/20/2016] [Accepted: 07/20/2016] [Indexed: 05/22/2023]
Abstract
Silver nanoparticles (nanosilver or AgNPs) enter municipal wastewater from various sources, raising concerns about their potential adverse effects on wastewater treatment processes. We argue that the biological effects of silver nanoparticles at environmentally realistic concentrations (μgL-1 or lower) on the performance of a full-scale municipal water resource recovery facility (WRRF) are minimal. Reactor configuration is a critical factor that reduces or even mutes the toxicity of silver nanoparticles towards wastewater microbes in a full-scale WRRF. Municipal sewage collection networks transform silver nanoparticles into silver(I)-complexes/precipitates with low ecotoxicity, and preliminary/primary treatment processes in front of biological treatment utilities partially remove silver nanoparticles to sludge. Microbial functional redundancy and microbial adaptability to silver nanoparticles also greatly alleviate the adverse effects of silver nanoparticles on the performance of a full-scale WRRF. Silver nanoparticles in a lab-scale bioreactor without a sewage collection system and/or a preliminary/primary treatment process, in contrast to being in a full scale system, may deteriorate the reactor performance at relatively high concentrations (e.g., mgL-1 levels or higher). However, in many cases, silver nanoparticles have minimal impacts on lab-scale bioreactors, such as sequencing batch bioreactors (SBRs), especially when at relatively low concentrations (e.g., less than 1mgL-1). The susceptibility of wastewater microbes to silver nanoparticles is species-specific. In general, silver nanoparticles have higher toxicity towards nitrifying bacteria than heterotrophic bacteria.
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Affiliation(s)
- Chiqian Zhang
- Department of Civil and Environmental Engineering, University of Missouri, Columbia, MO 65211, USA.
| | - Zhiqiang Hu
- Department of Civil and Environmental Engineering, University of Missouri, Columbia, MO 65211, USA
| | - Ping Li
- College of Environment and Energy, South China University of Technology, Guangzhou 510006, PR China
| | - Shashikanth Gajaraj
- Department of Civil and Environmental Engineering, University of Missouri, Columbia, MO 65211, USA
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Xu Y, Wang C, Hou J, Wang P, You G, Miao L, Lv B, Yang Y. Influence of CeO 2 NPs on biological phosphorus removal and bacterial community shifts in a sequencing batch biofilm reactor with the differential effects of molecular oxygen. ENVIRONMENTAL RESEARCH 2016; 151:21-29. [PMID: 27448729 DOI: 10.1016/j.envres.2016.07.008] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/21/2016] [Revised: 06/19/2016] [Accepted: 07/07/2016] [Indexed: 06/06/2023]
Abstract
The effects of CeO2 nanoparticles (CeO2 NPs) on a sequencing batch biofilm reactor (SBBR) with established biological phosphorus (P) removal were investigated from the processes of anaerobic P release and aerobic P uptake. At low concentration (0.1mg/L), no significant impact was observed on total phosphorus (TP) removal after operating for 8h. However, at a concentration of 20mg/L, TP removal efficiency decreased from 83.68% to 55.88% and 16.76% when the CeO2 NPs were added at the beginning of the anaerobic and aerobic periods, respectively. Further studies illustrated that the inhibition of the specific P release rate was caused by the reversible states of Ce3+ and Ce4+, which inhibited the activity of exopolyphosphatase (PPX) and transformation of poly-β-hydoxyalkanoates (PHA) and glycogen, as well as the uptake of volatile fatty acids (VFAs). The decrease in the specific P uptake rate was mainly attributed to the significantly suppressed energy generation and decreased abundance of Burkholderia caused by excess reactive oxygen species. The removal of chemical oxygen demand (COD) was not influenced by CeO2 NPs under aerobic conditions, due to the increased abundance of Acetobacter and Acidocella after exposure. The inhibitory effects of CeO2 NPs with molecular oxygen were reduced after anaerobic exposure due to the enhanced particle size and the presence of Ce3+.
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Affiliation(s)
- Yi Xu
- Key Laboratory of Integrated Regulation and Resources Development on Shallow Lakes, Ministry of Education, Hohai University, Nanjing 210098, People's Republic of China; College of Environment, Hohai University, Nanjing 210098, People's Republic of China
| | - Chao Wang
- Key Laboratory of Integrated Regulation and Resources Development on Shallow Lakes, Ministry of Education, Hohai University, Nanjing 210098, People's Republic of China; 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, Ministry of Education, Hohai University, Nanjing 210098, People's Republic of China; 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, Ministry of Education, Hohai University, Nanjing 210098, People's Republic of China; College of Environment, Hohai University, Nanjing 210098, People's Republic of China.
| | - Guoxiang You
- Key Laboratory of Integrated Regulation and Resources Development on Shallow Lakes, Ministry of Education, Hohai University, Nanjing 210098, People's Republic of China; 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, Ministry of Education, Hohai University, Nanjing 210098, People's Republic of China; College of Environment, Hohai University, Nanjing 210098, People's Republic of China
| | - Bowen Lv
- Key Laboratory of Integrated Regulation and Resources Development on Shallow Lakes, Ministry of Education, Hohai University, Nanjing 210098, People's Republic of China; College of Environment, Hohai University, Nanjing 210098, People's Republic of China
| | - Yangyang Yang
- Key Laboratory of Integrated Regulation and Resources Development on Shallow Lakes, Ministry of Education, Hohai University, Nanjing 210098, People's Republic of China; College of Environment, Hohai University, Nanjing 210098, People's Republic of China
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Mallevre F, Alba C, Milne C, Gillespie S, Fernandes TF, Aspray TJ. Toxicity Testing of Pristine and Aged Silver Nanoparticles in Real Wastewaters Using Bioluminescent Pseudomonas putida. NANOMATERIALS (BASEL, SWITZERLAND) 2016; 6:E49. [PMID: 28344306 PMCID: PMC5302522 DOI: 10.3390/nano6030049] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/27/2016] [Revised: 02/25/2016] [Accepted: 03/03/2016] [Indexed: 12/12/2022]
Abstract
Impact of aging on nanoparticle toxicity in real matrices is scarcely investigated due to a lack of suitable methodologies. Herein, the toxicity of pristine and aged silver nanoparticles (Ag NPs) to a bioluminescent Pseudomonas putida bioreporter was measured in spiked crude and final wastewater samples (CWs and FWs, respectively) collected from four wastewater treatment plants (WWTPs). Results showed lower toxicity of pristine Ag NPs in CWs than in FWs. The effect of the matrix on the eventual Ag NP toxicity was related to multiple physico-chemical parameters (biological oxygen demand (BOD), chemical oxygen demand (COD), total suspended solids (TSS) pH, ammonia, sulfide and chloride) based on a multivariate analysis. However, no collection site effect was concluded. Aged Ag NPs (up to eight weeks) were found less toxic than pristine Ag NPs in CWs; evident increased aggregation and decreased dissolution were associated with aging. However, Ag NPs exhibited consistent toxicity in FWs despite aging; comparable results were obtained in artificial wastewater (AW) simulating effluent. The study demonstrates the potency of performing nanoparticle acute toxicity testing in real and complex matrices such as wastewaters using relevant bacterial bioreporters.
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Affiliation(s)
- Florian Mallevre
- School of Life Sciences, NanoSafety Research Group, Heriot-Watt University, Edinburgh EH14 4AS, UK.
| | - Camille Alba
- Sciences and Technologies, Lille 1 University, Villeneuve d'Ascq 59650, France.
| | - Craig Milne
- Scottish Water, Juniper House, Heriot-Watt Research Park, Edinburgh EH14 4AP, UK.
| | - Simon Gillespie
- Scottish Water, Juniper House, Heriot-Watt Research Park, Edinburgh EH14 4AP, UK.
| | - Teresa F Fernandes
- School of Life Sciences, NanoSafety Research Group, Heriot-Watt University, Edinburgh EH14 4AS, UK.
| | - Thomas J Aspray
- School of Life Sciences, NanoSafety Research Group, Heriot-Watt University, Edinburgh EH14 4AS, UK.
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Liu Z, Zhou H, Liu J, Yin X, Mao Y, Liu Z, Li Z, Xie W. Microbiote shift in sequencing batch reactors in response to antimicrobial ZnO nanoparticles. RSC Adv 2016. [DOI: 10.1039/c6ra22823b] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Zinc oxide nanoparticles (ZnO NPs) have been monitored in wastewater treatment plants as their potential adverse effects on functional microorganisms have been causing increasing concern.
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Affiliation(s)
- Zhenghui Liu
- School of Environmental and Biological Engineering
- Guangdong University of Petrochemical Technology
- Maoming
- China
- Technology Research Center for Petrochemical Resources Clean Utilization of Guangdong Province
| | - Huifang Zhou
- School of Environmental and Biological Engineering
- Guangdong University of Petrochemical Technology
- Maoming
- China
| | - Jiefeng Liu
- School of Environmental and Biological Engineering
- Guangdong University of Petrochemical Technology
- Maoming
- China
| | - Xudong Yin
- School of Environmental and Biological Engineering
- Guangdong University of Petrochemical Technology
- Maoming
- China
- Technology Research Center for Petrochemical Resources Clean Utilization of Guangdong Province
| | - Yufeng Mao
- School of Environmental and Biological Engineering
- Guangdong University of Petrochemical Technology
- Maoming
- China
| | - Zhisen Liu
- Technology Research Center for Petrochemical Resources Clean Utilization of Guangdong Province
- Maoming
- China
| | - Zesheng Li
- Technology Research Center for Petrochemical Resources Clean Utilization of Guangdong Province
- Maoming
- China
| | - Wenyu Xie
- School of Environmental and Biological Engineering
- Guangdong University of Petrochemical Technology
- Maoming
- China
- Technology Research Center for Petrochemical Resources Clean Utilization of Guangdong Province
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48
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Wang ST, Wang WQ, Zhang ZR, You H. The impact of zinc oxide nanoparticles on phosphorus removal and the microbial community in activated sludge in an SBR. RSC Adv 2016. [DOI: 10.1039/c6ra19486a] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
10 and 20 mg L−1 ZnO NPs damaged the integrity of cell membranes and the microbial community and affected phosphorus removal.
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Affiliation(s)
- S. T. Wang
- State Key Laboratory of Urban Water Resource and Environment
- Harbin Institute of Technology
- Harbin 150090
- China
| | - W. Q. Wang
- State Key Laboratory of Urban Water Resource and Environment
- Harbin Institute of Technology
- Harbin 150090
- China
| | - Z. R. Zhang
- State Key Laboratory of Urban Water Resource and Environment
- Harbin Institute of Technology
- Harbin 150090
- China
| | - H. You
- State Key Laboratory of Urban Water Resource and Environment
- Harbin Institute of Technology
- Harbin 150090
- China
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49
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Abstract
Silver nanoparticles (Ag-NPs) have strong antibacterial properties, which may adversely affect biological wastewater treatment processes. To determine the overall effect, intact biofilm samples were collected from the rotating biological contactor at the local wastewater treatment plant and treated with 200 mg Ag/L Ag-NPs for 24 h. The biofilm uptake of Ag-NPs was monitored with transmission electron microscopy. Forty-five minutes after Ag-NP application, Ag-NPs were seen in the biofilm extracellular polymeric substances (EPS). After 24 h, Ag-NPs had entered certain microbial cells, while other cells contained no observable Ag-NPs. Some cells were dying after the uptake of Ag-NPs. However, there was no significant reduction in cultivable bacteria in the biofilms, based on heterotrophic plate counts (HPC). While this may indicate that wastewater biofilms are highly resistant to Ag-NPs, the HPC represents only a small portion of the total microbial population. To further investigate the effects of Ag-NPs, a GeoChip microarray was used to directly detect changes in the functional gene structure of the microbial community in the biofilm. A clear decrease (34.6% decreases in gene number) in gene diversity was evident in the GeoChip analysis. However, the complete loss of any specific gene was rare. Most gene families present in both treated and untreated biofilms. However, this doesn’t necessarily mean that there was no change in these families. Signal intensity decreased in certain variants in each family while other variants increased to compensate the effects of Ag-NPs. The results indicate that Ag-NP treatment decreased microbial community diversity but did not significantly affect the microbial community function. This provides direct evidence for the functional redundancy of microbial community in engineered ecosystems such as wastewater biofilms.
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Affiliation(s)
- Zhiya Sheng
- Department of Civil and Environmental Engineering, University of Alberta Edmonton, AB, Canada
| | - Joy D Van Nostrand
- Institute for Environmental Genomics and Department of Microbiology and Plant Biology, The University of Oklahoma Norman, OK, USA
| | - Jizhong Zhou
- Institute for Environmental Genomics and Department of Microbiology and Plant Biology, The University of Oklahoma Norman, OK, USA
| | - Yang Liu
- Department of Civil and Environmental Engineering, University of Alberta Edmonton, AB, Canada
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50
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Wang D, Chen Y. Critical review of the influences of nanoparticles on biological wastewater treatment and sludge digestion. Crit Rev Biotechnol 2015; 36:816-28. [DOI: 10.3109/07388551.2015.1049509] [Citation(s) in RCA: 81] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Dongbo Wang
- State Key Laboratory of Pollution Control and Resources Reuse, School of Environmental Science and Engineering, Tongji University, Shanghai, P.R. China
| | - Yinguang Chen
- State Key Laboratory of Pollution Control and Resources Reuse, School of Environmental Science and Engineering, Tongji University, Shanghai, P.R. China
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