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Cortés-Téllez AA, D'ors A, Sánchez-Fortún A, Fajardo C, Mengs G, Nande M, Martín C, Costa G, Martín M, Bartolomé-Camacho MC, Sánchez-Fortún S. Using single-species and algal communities to determine long-term adverse effects of silver nanoparticles on freshwater phytoplankton. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 928:172500. [PMID: 38631630 DOI: 10.1016/j.scitotenv.2024.172500] [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: 02/22/2024] [Revised: 04/05/2024] [Accepted: 04/13/2024] [Indexed: 04/19/2024]
Abstract
The physical and chemical properties of silver nanoparticles (AgNPs) have led to their increasing use in various fields such as medicine, food, and industry. Evidence has proven that AgNPs cause adverse effects in aquatic ecosystems, especially when the release of Ag is prolonged in time. Several studies have shown short-term adverse effects of AgNPs on freshwater phytoplankton, but few studies have analysed the impact of long-term exposures on these populations. Our studies were carried out to assess the effects of AgNPs on growth rate, photosynthesis activity, and reactive oxygen species (ROS) generation on the freshwater green algae Scenedesmus armatus and the cyanobacteria Microcystis aeruginosa, and additionally on microcystin (MC-LR) generation from these cyanobacteria. The tests were conducted both in single-species cultures and in phytoplanktonic communities exposed to 1 ngL-1 AgNPs for 28 days. The results showed that cell growth rate of both single-species cultures decreased significantly at the beginning and progressively reached control-like values at 28 days post-exposure. This effect was similar for the community-cultured cyanobacteria, but not for the green algae, which maintained a sustained decrease in growth rate. While gross photosynthesis (Pg) increased in both strains exposed in single cultures, dark respiration (R) and net photosynthesis (Pn) decreased in S. armatus and M. aeruginosa, respectively. These effects were mitigated when both strains were exposed under community culture conditions. Similarly, the ROS generation shown by both strains exposed in single-species cultures was mitigated when exposure occurred in community cultures. MC-LR production and release were significantly decreased in both single-species and community exposures. These results can supply helpful information to further investigate the potential risks of AgNPs and ultimately help policymakers make better-informed decisions about their utilization for environmental restoration.
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Affiliation(s)
- A A Cortés-Téllez
- Environmental Toxicology Laboratory, Faculty of Chemistry-Pharmacobiology, Universidad Michoacana de San Nicolás de Hidalgo, 403 Santiago Tapia St., 58000 Morelia, Michoacán, Mexico
| | - A D'ors
- Dpt. of Pharmacology and Toxicology, Universidad Complutense de Madrid (UCM), w/n Puerta de Hierro Ave., 28040 Madrid, Spain
| | - A Sánchez-Fortún
- Dpt. of Pharmacology and Toxicology, Universidad Complutense de Madrid (UCM), w/n Puerta de Hierro Ave., 28040 Madrid, Spain
| | - C Fajardo
- Dpt. of Biomedicine and Biotechnology, Universidad de Alcalá (UAH), w/n San Diego Sq., 28801 Alcalá de Henares, Spain
| | - G Mengs
- Techincal and R&D Department, Ecotoxilab SL. 10 Juan XXIII., 28550 Tielmes, Spain
| | - M Nande
- Dpt. of Biochemistry and Molecular Biology, Complutense University. w/n Puerta de Hierro Ave., 28040 Madrid, Spain
| | - C Martín
- Dpt. of Biotechnology-Plant Biology, Universidad Politécnica de Madrid (UPM), 3 Complutense Ave., 28040 Madrid, Spain
| | - G Costa
- Department of Animal Physiology, Faculty of Veterinary Sciences, Complutense University. w/n Puerta de Hierro Ave., 28040 Madrid, Spain
| | - M Martín
- Dpt. of Biochemistry and Molecular Biology, Complutense University. w/n Puerta de Hierro Ave., 28040 Madrid, Spain
| | - M C Bartolomé-Camacho
- Environmental Toxicology Laboratory, Faculty of Chemistry-Pharmacobiology, Universidad Michoacana de San Nicolás de Hidalgo, 403 Santiago Tapia St., 58000 Morelia, Michoacán, Mexico
| | - S Sánchez-Fortún
- Dpt. of Pharmacology and Toxicology, Universidad Complutense de Madrid (UCM), w/n Puerta de Hierro Ave., 28040 Madrid, Spain.
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2
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Samuel SA, Chia MA, Yusufu WN, Dauda S, Japhet WS, Habila JD. Nitrogen forms and concentration influence the impact of titanium dioxide nanoparticles on the biomass and antioxidant enzyme activities of Microcystis aeruginosa. Arch Microbiol 2023; 205:177. [PMID: 37029289 DOI: 10.1007/s00203-023-03500-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2022] [Revised: 03/18/2023] [Accepted: 03/22/2023] [Indexed: 04/09/2023]
Abstract
Nanoparticles (NPs) are becoming more widely produced, used, and released into the aquatic environment. In aquatic ecosystems, these NPs affect different populations of photosynthesizing organisms, such as cyanobacteria. This study aimed to evaluate the effects of titanium dioxide (TiO2) NPs (48 mg l-1) combined with low (0.04 mM) and high (9 mM) concentrations of urea and nitrate on Microcystis aeruginosa. Microcystins (MCs) production and release were monitored in the cyanobacterium. The results showed that high urea concentration (9 mM) combined with TiO2 NPs inhibited growth, pigment, and malondialdehyde (MDA) content by 82%, 63%, and 47%, respectively. The treatment also increased the reactive oxygen species (ROS) and glutathione S-transferase (GST) activity by 40.7% and 67.7%, respectively. Similarly, low nitrate (0.04 mM) combined with TiO2 NPs inhibited growth by 40.3% and GST activity by 36.3% but stimulated pigment production and ROS concentration in M. aeruginosa. These responses suggest that high urea combined with TiO2.NPs and high nitrate combined with TiO2 NPs induced oxidative stress in cyanobacteria. The peroxidase (POD) activity of M. aeruginosa decreased by 17.7% with increasing urea concentrations. Our findings suggest that TiO2 NPs combined with changing nutrient (urea and nitrate) concentrations may adversely affect cyanobacterial development and antioxidant defense enzymes.
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Affiliation(s)
| | | | - Waetsi Nya Yusufu
- Department of Botany, Ahmadu Bello University, Zaria, Nigeria
- Department of Biological Sciences, Taraba State University, Jalingo 14, Nigeria
| | - Suleiman Dauda
- Department of Botany, Ahmadu Bello University, Zaria, Nigeria
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Wang X, Wang J, Chen J, Chen J, Lv Y, Chen R, Xu J, Li D, He X, Hou J. Formation of microorganism-derived dissolved organic nitrogen in intermittent aeration constructed wetland and its stimulating effect on phytoplankton production: Implications for nitrogen mitigation. WATER RESEARCH 2023; 230:119563. [PMID: 36621276 DOI: 10.1016/j.watres.2022.119563] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/11/2022] [Revised: 11/25/2022] [Accepted: 12/31/2022] [Indexed: 06/17/2023]
Abstract
To control eutrophication in aquatic ecosystems, enhancing nitrogen removal in the constructed wetland (CW) by upgrading conventional CW to aeration CW is commonplace. However, regulatory efforts have only focused on reducing dissolved inorganic nitrogen (DIN) discharge and disregarding dissolved organic nitrogen (DON). Here, we used experimental mesocosms to investigate the effect of aeration mode on the characteristics of effluent DON in CW. The results showed that intermittent aeration is prone to introduce large amounts of DON and bioavailable DON (ABDON) in the effluents, although it greatly decreases effluent total nitrogen (TN). Analysis of DON fluorescent components and molecular characteristics indicated that suddenly shifting the environment from anoxic condition to aerobic condition in the intermittent aeration CW (IACW) would stimulate microorganisms to release tryptophan and simple aromatic proteins-like substances, which does not occur in the limited continuous aeration CW (CACW). Consequently, the abundance of DON resembling lipids, proteins/amino sugars, and carbohydrates-like molecules in IACW were about 2.1 times higher than that in CACW. Bioassay results showed that Selenastrum capricornutum and Microcystis aeruginosa incubated with effluent from IACW both generate larger phytoplankton biomass than that with CACW effluent, even though IACW effluent contains less TN than its counterpart. Moreover, Microcystis aeruginosa can simultaneously utilize DON and DIN, while Selenastrum capricornutum seem to utilize the DON only when DIN was not available. This result implies that increasing DON discharge may also influence phytoplankton composition and stimulate harmful phytoplankton species. Overall, this study indicates that upgrading CW solely depending on DIN removal level cannot ensure a mitigation of nitrogen-related eutrophication, and more efforts should be paid to curb DON discharge.
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Affiliation(s)
- Xiaoning Wang
- College of Fisheries, Huazhong Agricultural University, Wuhan 430070, China
| | - Jie Wang
- College of Fisheries, Huazhong Agricultural University, Wuhan 430070, China
| | - Jingyi Chen
- College of Fisheries, Huazhong Agricultural University, Wuhan 430070, China
| | - Jieyu Chen
- College of Fisheries, Huazhong Agricultural University, Wuhan 430070, China
| | - Yabing Lv
- College of Fisheries, Huazhong Agricultural University, Wuhan 430070, China
| | - Ruiya Chen
- College of Fisheries, Huazhong Agricultural University, Wuhan 430070, China
| | - Juchen Xu
- College of Fisheries, Huazhong Agricultural University, Wuhan 430070, China
| | - Dapeng Li
- College of Fisheries, Huazhong Agricultural University, Wuhan 430070, China; Engineering Research Center of Green Development for Conventional Aquatic Biological Industry in the Yangtze River Economic Belt, Ministry of Education, Wuhan 430070, China; Freshwater Aquaculture Collaborative Innovation Center of Hubei Province, Wuhan 430070, China
| | - Xugang He
- College of Fisheries, Huazhong Agricultural University, Wuhan 430070, China; Engineering Research Center of Green Development for Conventional Aquatic Biological Industry in the Yangtze River Economic Belt, Ministry of Education, Wuhan 430070, China; Freshwater Aquaculture Collaborative Innovation Center of Hubei Province, Wuhan 430070, China.
| | - Jie Hou
- College of Fisheries, Huazhong Agricultural University, Wuhan 430070, China; Engineering Research Center of Green Development for Conventional Aquatic Biological Industry in the Yangtze River Economic Belt, Ministry of Education, Wuhan 430070, China; Freshwater Aquaculture Collaborative Innovation Center of Hubei Province, Wuhan 430070, China.
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4
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Xin X, Huang G, Zhang B. Review of aquatic toxicity of pharmaceuticals and personal care products to algae. JOURNAL OF HAZARDOUS MATERIALS 2021; 410:124619. [PMID: 33248823 DOI: 10.1016/j.jhazmat.2020.124619] [Citation(s) in RCA: 51] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/19/2020] [Revised: 11/03/2020] [Accepted: 11/05/2020] [Indexed: 06/12/2023]
Abstract
Pharmaceuticals and Personal Care Products (PPCPs) have been frequently detected in the environment around the world. Algae play a significant role in aquatic ecosystem, thus the influence on algae may affect the life of higher trophic organisms. This review provides a state-of-the-art overview of current research on the toxicity of PPCPs to algae. Nanoparticles, contained in personal care products, also have been considered as the ingredients of PPCPs. PPCPs could cause unexpected effects on algae and their communities. Chlorophyta and diatoms are more accessible and sensitive to PPCPs. Multiple algal endpoints should be considered to provide a complete evaluation on PPCPs toxicity. The toxicity of organic ingredients in PPCPs could be predicted through quantitative structure-activity relationship model, whereas the toxicity of nanoparticles could be predicted with limitations. Light irradiation can change the toxicity through affecting algae and PPCPs. pH and natural organic matter can affect the toxicity through changing the existence of PPCPs. For joint and tertiary toxicity, experiments could be conducted to reveal the toxic mechanism. For multiple compound mixture toxicity, concentration addition and independent addition models are preferred. However, there has no empirical models to study nanoparticle-contained mixture toxicity. Algae-based remediation is an emerging technology to prevent the release of PPCPs from water treatment plants. Although many individual algal species are identified for removing a few compounds from PPCPs, algal-bacterial photobioreactor is a preferable alternative, with higher chances for industrial applications.
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Affiliation(s)
- Xiaying Xin
- Northern Region Persistent Organic Pollution Control (NRPOP) Laboratory, Civil Engineering, Memorial University, NL A1B 3X5, St. John's Canada; Institute for Energy, Environment and Sustainable Communities, University of Regina, SK S4S 0A2 Regina, Canada
| | - Gordon Huang
- Institute for Energy, Environment and Sustainable Communities, University of Regina, SK S4S 0A2 Regina, Canada.
| | - Baiyu Zhang
- Northern Region Persistent Organic Pollution Control (NRPOP) Laboratory, Civil Engineering, Memorial University, NL A1B 3X5, St. John's Canada.
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Peace A, Frost PC, Wagner ND, Danger M, Accolla C, Antczak P, Brooks BW, Costello DM, Everett RA, Flores KB, Heggerud CM, Karimi R, Kang Y, Kuang Y, Larson JH, Mathews T, Mayer GD, Murdock JN, Murphy CA, Nisbet RM, Pecquerie L, Pollesch N, Rutter EM, Schulz KL, Scott JT, Stevenson L, Wang H. Stoichiometric Ecotoxicology for a Multisubstance World. Bioscience 2021. [DOI: 10.1093/biosci/biaa160] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
Abstract
Nutritional and contaminant stressors influence organismal physiology, trophic interactions, community structure, and ecosystem-level processes; however, the interactions between toxicity and elemental imbalance in food resources have been examined in only a few ecotoxicity studies. Integrating well-developed ecological theories that cross all levels of biological organization can enhance our understanding of ecotoxicology. In the present article, we underline the opportunity to couple concepts and approaches used in the theory of ecological stoichiometry (ES) to ask ecotoxicological questions and introduce stoichiometric ecotoxicology, a subfield in ecology that examines how contaminant stress, nutrient supply, and elemental constraints interact throughout all levels of biological organization. This conceptual framework unifying ecotoxicology with ES offers potential for both empirical and theoretical studies to deepen our mechanistic understanding of the adverse outcomes of chemicals across ecological scales and improve the predictive powers of ecotoxicology.
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Affiliation(s)
- Angela Peace
- Department of Mathematics and Statistics, Texas Tech University, Lubbock, Texas, United States
| | - Paul C Frost
- Department of Biology, Trent University, Peterborough, Ontario, Canada
| | - Nicole D Wagner
- Center for Reservoir and Aquatic Systems Research, Baylor University, Waco, Texas, United States
| | | | - Chiara Accolla
- Department of Ecology, Evolution, and Behavior, University of Minnesota, Twin Cities, Minneapolis, Minnesota, United States
| | | | - Bryan W Brooks
- Department of Environmental Science, Baylor University, Waco, Texas, United States
| | - David M Costello
- Department of Biological Sciences, Kent State University, Kent, Ohio, United States
| | - Rebecca A Everett
- Department of Mathematics and Statistics, Haverford College, Haverford, Pennsylvania, United States
| | - Kevin B Flores
- Department of Mathematics and the Center for Research in Scientific Computation, North Carolina State University, Raleigh, North Carolina, United States
| | - Christopher M Heggerud
- Department of Mathematical and Statistical Sciences, University of Alberta, Edmonton, Alberta, Canada
| | - Roxanne Karimi
- School of Marine and Atmospheric Sciences, Stony Brook University, Stony Brook, New York, United States
| | - Yun Kang
- Arizona State University, Mesa, Arizona, United States
| | - Yang Kuang
- Arizona State University, Tempe, Arizona, United States
| | - James H Larson
- US Geological Survey's Upper Midwest Environmental Sciences Center, La Crosse, Wisconsin, United States
| | - Teresa Mathews
- Environmental Sciences Division of Oak Ridge National Laboratory, Oak Ridge, Tennessee, United States
| | - Gregory D Mayer
- Department of Environmental Toxicology, Texas Tech University, Lubbock, Texas, United States
| | - Justin N Murdock
- Department of Biology, Tennessee Tech University, Cookeville, Tennessee, United States
| | - Cheryl A Murphy
- Department of Fisheries and Wildlife, Michigan State University, East Lansing, Michigan, United States
| | - Roger M Nisbet
- Department of Ecology, Evolution, and Marine Biology, University of California, Santa Barbara, Santa Barbara, California, United States
| | - Laure Pecquerie
- Université de Brest, CNRS, IRD, Ifremer, LEMAR, Plouzane, France
| | - Nathan Pollesch
- University of Wisconsin's Aquatic Sciences Center and with the US Environmental Protection Agency's Great Lakes Toxicology and Ecology Division, Duluth, Minnesota, United States
| | - Erica M Rutter
- Department of Applied Mathematics, University of California, Merced, Merced, California, United States
| | - Kimberly L Schulz
- Department of Environmental and Forest Biology, State University of New York's College of Environmental Science and Forestry, Syracuse, New York, United States
| | - J Thad Scott
- Department of Biology, Baylor University, Waco, Texas, United States
| | - Louise Stevenson
- Environmental Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee; with the Department of Ecology, Evolution, and Marine Biology, University of California, Santa Barbara, Santa Barbara, California; and with the Department of Biological Sciences at Bowling Green State University, in Bowling Green, Ohio, United States
| | - Hao Wang
- Department of Mathematical and Statistical Sciences, University of Alberta, Edmonton, Alberta, Canada
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6
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Carley LN, Panchagavi R, Song X, Davenport S, Bergemann CM, McCumber AW, Gunsch CK, Simonin M. Long-Term Effects of Copper Nanopesticides on Soil and Sediment Community Diversity in Two Outdoor Mesocosm Experiments. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2020; 54:8878-8889. [PMID: 32543178 DOI: 10.1021/acs.est.0c00510] [Citation(s) in RCA: 39] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
The use of novel pesticides containing nanomaterials (nanopesticides) is growing and is considered a promising approach to reduce the impacts of agriculture on the environment and human health. However, the environmental effects of these novel agrochemicals are not fully characterized, and more research is needed to determine the benefits and risks they confer. Here, we assessed the impacts of repeated exposures to a Cu(OH)2 nanopesticide on the soil and sediment biodiversity of target (terrestrial) and nontarget (wetland) ecosystems by performing long-term outdoor mesocosm experiments. As pesticides are often used concomitantly with other agrochemicals, we also tested for interactive effects between nanopesticide exposure and fertilization treatments in both ecosystems. We used high-throughput sequencing on three marker genes to characterize effects on bacterial, fungal, and total eukaryotic community structure and diversity. Interestingly, we found limited effects of nanopesticide exposure on the terrestrial soil communities. Conversely, we found significant shifts in the sediment communities of the wetland mesocosms, especially for eukaryotes (protists, fungi, and algae). In the absence of fertilization, fungal and total eukaryotic community compositions exposed to nanopesticides for long periods of time were distinct from unexposed communities. We identified 60 taxa that were significantly affected by nanopesticide exposure, most of which were microeukaryotes affiliated to cercozoans, Gastrotricha, or unicellular algal taxa. Our study suggests that this nanopesticide has limited effects on the soil biodiversity of a target terrestrial agroecosystem, while nontarget aquatic communities are more sensitive, particularly among protists which are not targeted by this bactericide/fungicide.
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Affiliation(s)
- Lauren N Carley
- Biology Department, Duke University, Durham, North Carolina 27708, United States
- Duke University Program in Ecology, Durham, North Carolina 27708, United States
| | - Renuka Panchagavi
- Computational Science and Engineering Department, North Carolina A&T State University, Greensboro, North Carolina 27411, United States
| | - Xin Song
- Department of Electrical and Computer Engineering, Duke University, Durham, North Carolina 27708, United States
- Department of Biomedical Engineering, Duke University, Durham, North Carolina 27708, United States
| | - Sade Davenport
- Computational Science and Engineering Department, North Carolina A&T State University, Greensboro, North Carolina 27411, United States
| | - Christina M Bergemann
- Biology Department, Duke University, Durham, North Carolina 27708, United States
- Center for the Environmental Implications of Nanotechnology (CEINT), Duke University, Durham, North Carolina 27708, United States
| | - Alexander W McCumber
- Department of Civil and Environmental Engineering, Duke University, 121 Hudson Hall, Durham, North Carolina 27708-0287, United States
| | - Claudia K Gunsch
- Center for the Environmental Implications of Nanotechnology (CEINT), Duke University, Durham, North Carolina 27708, United States
- Department of Civil and Environmental Engineering, Duke University, 121 Hudson Hall, Durham, North Carolina 27708-0287, United States
| | - Marie Simonin
- Biology Department, Duke University, Durham, North Carolina 27708, United States
- Center for the Environmental Implications of Nanotechnology (CEINT), Duke University, Durham, North Carolina 27708, United States
- IRHS, Agrocampus-Ouest, INRA, Université d'Angers, SFR 4207 QuaSaV, Beaucouzé 49071, France
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7
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Huang Y, Liu C, Cui P, Dang F, Li M, Xing B, Zhou D. Copper(I) Promotes Silver Sulfide Dissolution and Increases Silver Phytoavailability. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2020; 54:5589-5597. [PMID: 32275397 DOI: 10.1021/acs.est.0c00929] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Metal sulfides, including acanthite (Ag2S), are persistent in the environment. In colloidal form, however, they can serve as a "Trojan horse", facilitating the mobility of trace metal contaminants. The natural processes that lead to the in situ dissolution of colloidal metal sulfides in soil are largely unknown. In this study, the dissolution of colloidal Ag2S in topsoil and Ag phytoavailability to wheat were examined in Ag2S-Cu(II)-thiosulfate systems. Cu(II) and thiosulfate strongly increased silver release (up to 83% of total Ag) from Ag2S in the dark. Electron paramagnetic resonance, X-ray photoelectron spectroscopy, and Cu K-edge X-ray absorption spectroscopy identified Cu(I) as the driving force of Ag2S dissolution. Density functional theory calculations further demonstrated the ability of Cu(I) to substitute for surface Ag on Ag2S in an energetically favorable manner. However, excess Cu(II) could enhance the formation of precipitates containing Cu(I), Ag, and S. Our results indicate that at ambient temperature and in the dark, Cu(I) can promote the dissolution of Ag2S and act as a precipitating agent. These findings reveal previously unrecognized biogeochemical processes of colloidal Ag2S and their importance in determining the fate of metal sulfides in the environment and probably also in vivo.
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Affiliation(s)
- Yingnan Huang
- Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, P. R. China
- University of Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Cun Liu
- Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, P. R. China
- University of Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Peixin Cui
- Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, P. R. China
- University of Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Fei Dang
- Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, P. R. China
- University of Chinese Academy of Sciences, Beijing 100049, P. R. China
- Stockbridge School of Agriculture, University of Massachusetts, Amherst, Massachusetts 01003, United States
| | - Min Li
- Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, P. R. China
- University of Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Baoshan Xing
- Stockbridge School of Agriculture, University of Massachusetts, Amherst, Massachusetts 01003, United States
| | - Dongmei Zhou
- Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, P. R. China
- University of Chinese Academy of Sciences, Beijing 100049, P. R. China
- School of the Environment, Nanjing University, Nanjing 210023, P. R. China
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8
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Zhang Y, Xu J, Yang Y, Sun B, Wang K, Zhu L. Impacts of Proteins on Dissolution and Sulfidation of Silver Nanowires in an Aquatic Environment: Importance of Surface Charges. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2020; 54:5560-5568. [PMID: 32259435 DOI: 10.1021/acs.est.0c00461] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
With increasing utilization of silver nanomaterials, growing concerns are raised on their deleterious effects to the environment. Once discharged in an aquatic environment, the interactions between silver nanowires (AgNWs) and proteins may significantly affect the environmental behaviors, fate, and toxicities of AgNWs. In the present study, three representative model proteins, including ovalbumin (OVA), bovine serum albumin (BSA), and lysozyme (LYZ), were applied to investigate the impacts of the interactions between proteins and AgNWs on the transformations (oxidative dissolution and sulfidation) of AgNWs in an aquatic environment. Fluorescence spectroscopy and isothermal titration calorimetry analyses indicated that there was very weak interaction between OVA or BSA and AgNWs, but there was a strong interaction between the positively charged LYZ and the negatively charged AgNWs. The presence of LYZ not only reversed the surface charge of AgNWs but also resulted in the breakup of the nanowire structure and increased the reactive surface area. The positively charged surface of AgNWs in the presence of LYZ favored the access of sulfide ions. As a consequence, the kinetics of oxidative dissolution and sulfidation of AgNWs were not affected by OVA and BSA but were significantly facilitated by LYZ. The results shed light on the important roles of electrostatic interactions between AgNWs and proteins, which may have important implications for evaluating the fate and effects of silver nanomaterials in complicated environments.
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Affiliation(s)
- Yinqing Zhang
- Key Laboratory of Pollution Processes and Environmental Criteria (Ministry of Education), Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, P. R. China
| | - Jinliang Xu
- Key Laboratory of Pollution Processes and Environmental Criteria (Ministry of Education), Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, P. R. China
| | - Yi Yang
- Key Laboratory of Pollution Processes and Environmental Criteria (Ministry of Education), Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, P. R. China
| | - Binbin Sun
- Key Laboratory of Pollution Processes and Environmental Criteria (Ministry of Education), Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, P. R. China
| | - Kunkun Wang
- Key Laboratory of Pollution Processes and Environmental Criteria (Ministry of Education), Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, P. R. China
| | - Lingyan Zhu
- Key Laboratory of Pollution Processes and Environmental Criteria (Ministry of Education), Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, P. R. China
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9
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Wan B, Huang R, Diaz JM, Tang Y. Polyphosphate Adsorption and Hydrolysis on Aluminum Oxides. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2019; 53:9542-9552. [PMID: 31313918 DOI: 10.1021/acs.est.9b01876] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
The geochemical behaviors of phosphate-containing species at mineral-water interfaces are of fundamental importance for controlling phosphorus mobility, fate, and bioavailability. This study investigates the sorption and hydrolysis of polyphosphate (a group of important long-chained phosphate molecules) on aluminum oxides in the presence of divalent metal cations (Ca2+, Cu2+, Mg2+, Mn2+, and Zn2+) at pH 6-8. γ-Al2O3 with three particle sizes (5, 35, and 70 nm) was used as an analogue of natural aluminum oxides to investigate the particle size effect. All metal cations enhanced polyphosphate hydrolysis at different levels, with Ca2+ showing the most significant enhancement, and the difference in the enhancement might be due to the intrinsic affinity of metal cations to polyphosphate. In the presence of Ca2+, the hydrolysis rate decreased with increasing mineral particle size. Solid-state 31P nuclear magnetic resonance spectroscopy (NMR) revealed the main surface P species to be amorphous calcium phosphate precipitates, phosphate groups in polyphosphate that formed direct bonds with the mineral surface as inner-sphere complexes, and phosphate groups in polyphosphate that were not directly bonded to the mineral surfaces. Our results reveal the critical roles of mineral-water interface processes and divalent metal cations on controlling polyphosphate speciation and transformation and phosphorus cycling.
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Affiliation(s)
- Biao Wan
- School of Earth and Atmospheric Sciences , Georgia Institute of Technology , 311 Ferst Drive , Atlanta , Georgia 30332-0340 , United States
| | - Rixiang Huang
- School of Earth and Atmospheric Sciences , Georgia Institute of Technology , 311 Ferst Drive , Atlanta , Georgia 30332-0340 , United States
| | - Julia M Diaz
- Skidaway Institute of Oceanography, Department of Marine Sciences , University of Georgia , Savannah , Georgia 31411-1011 , United States
| | - Yuanzhi Tang
- School of Earth and Atmospheric Sciences , Georgia Institute of Technology , 311 Ferst Drive , Atlanta , Georgia 30332-0340 , United States
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10
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Norman BC, Frost PC, Blakelock GC, Higgins SN, Hoque ME, Vincent JL, Cetinic K, Xenopoulos MA. Muted responses to Ag accumulation by plankton to chronic and pulse exposure to silver nanoparticles in a boreal lake. Facets (Ott) 2019. [DOI: 10.1139/facets-2018-0047] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Silver nanoparticles (AgNPs) are an emerging class of contaminants with the potential to impact ecosystem structure and function. AgNPs are antimicrobial, suggesting that microbe-driven ecosystem functions may be particularly vulnerable to AgNP exposure. Predicting the environmental impacts of AgNPs requires in situ investigation of environmentally relevant dosing regimens over time scales that allow for ecosystem-level responses. We used 3000 L enclosures installed in a boreal lake to expose plankton communities to chronic and pulse AgNP dosing regimens with concentrations mimicking those recorded in natural waters. We compared temporal patterns of plankton responses, Ag accumulation, and ecosystem metabolism (i.e., daily ecosystem respiration, gross primary production, and net ecosystem production) for 6 weeks of chronic dosing and 3 weeks following a pulsed dose. Ag accumulated in microplankton and zooplankton, but carbon-specific Ag was nonlinear over time and generally did not predict plankton response. Ecosystem metabolism did not respond to either AgNP exposure type. This lack of response corresponded with weak microplankton responses in the chronic treatments but did not reflect the stronger microplankton response in the pulse treatment. Our results suggest that lake ecosystem metabolism is somewhat resistant to environmentally relevant concentrations of AgNPs and that organismal responses do not necessarily predict ecosystem-level responses.
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Affiliation(s)
- Beth C. Norman
- Department of Biology, Trent University, Peterborough, ON K9L0G2, Canada
| | - Paul C. Frost
- Department of Biology, Trent University, Peterborough, ON K9L0G2, Canada
| | - Graham C. Blakelock
- Environmental and Life Sciences Graduate Program, Trent University, Peterborough, ON K9L 0G2, Canada
| | | | - Md Ehsanul Hoque
- Environmental and Resource Studies, Trent University, Peterborough, ON K9L 0G2, Canada
| | - Jennifer L. Vincent
- Environmental and Life Sciences Graduate Program, Trent University, Peterborough, ON K9L 0G2, Canada
| | - Katarina Cetinic
- Department of Biology, Trent University, Peterborough, ON K9L0G2, Canada
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11
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Zeng J, Xu P, Chen G, Zeng G, Chen A, Hu L, Huang Z, He K, Guo Z, Liu W, Wu J, Shi J. Effects of silver nanoparticles with different dosing regimens and exposure media on artificial ecosystem. J Environ Sci (China) 2019; 75:181-192. [PMID: 30473283 DOI: 10.1016/j.jes.2018.03.019] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2017] [Revised: 03/05/2018] [Accepted: 03/19/2018] [Indexed: 06/09/2023]
Abstract
Due to the wide use of silver nanoparticles (AgNPs) in various fields, it is crucial to explore the potential negative impacts on the aquatic environment of AgNPs entering into the environment in different ways. In this study, comparative experiments were conducted to investigate the toxicological impacts of polyvinylpyrrolidone-coated silver nanoparticles (PVP-AgNPs) with two kinds of dosing regimens, continuous and one-time pulsed dosing, in different exposure media (deionized water and XiangJiang River water). There were a number of quite different experimental results (including 100% mortality of zebrafish, decline in the activity of enzymes, and lowest number and length of adventitious roots) in the one-time pulsed dosing regimen at high PVP-AgNP concentration exposure (HOE) compared to the three other treatments. Meanwhile, we determined that the concentration of leached silver ions from PVP-AgNPs was too low to play a role in zebrafish death. Those results showed that HOE led to a range of dramatic ecosystem impacts which were more destructive than those of other treatments. Moreover, compared with the continuous dosing regimen, despite the fact that higher toxicity was observed for HOE, there was little difference in the removal of total silver from the aquatic environment for the different dosing regimens. No obvious differences in ecological impacts were observed between different water columns under low concentration exposure. Overall, this work highlighted the fact that the toxicity of AgNPs was impacted by different dosing regimens in different exposure media, which may be helpful for assessments of ecological impacts on aquatic environments.
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Affiliation(s)
- Jingwen Zeng
- College of Environmental Science and Engineering and Key Laboratory of Environmental Biology and Pollution Control of Ministry of Education, Hunan University, Changsha 410082, China
| | - Piao Xu
- College of Environmental Science and Engineering and Key Laboratory of Environmental Biology and Pollution Control of Ministry of Education, Hunan University, Changsha 410082, China
| | - Guiqiu Chen
- College of Environmental Science and Engineering and Key Laboratory of Environmental Biology and Pollution Control of Ministry of Education, Hunan University, Changsha 410082, China
| | - Guangming Zeng
- College of Environmental Science and Engineering and Key Laboratory of Environmental Biology and Pollution Control of Ministry of Education, Hunan University, Changsha 410082, China.
| | - Anwei Chen
- College of Resources and Environment, Hunan Agricultural University, Changsha 410128, China.
| | - Liang Hu
- College of Environmental Science and Engineering and Key Laboratory of Environmental Biology and Pollution Control of Ministry of Education, Hunan University, Changsha 410082, China
| | - Zhenzhen Huang
- College of Environmental Science and Engineering and Key Laboratory of Environmental Biology and Pollution Control of Ministry of Education, Hunan University, Changsha 410082, China
| | - Kai He
- College of Environmental Science and Engineering and Key Laboratory of Environmental Biology and Pollution Control of Ministry of Education, Hunan University, Changsha 410082, China
| | - Zhi Guo
- College of Environmental Science and Engineering and Key Laboratory of Environmental Biology and Pollution Control of Ministry of Education, Hunan University, Changsha 410082, China
| | - Weiwei Liu
- College of Environmental Science and Engineering and Key Laboratory of Environmental Biology and Pollution Control of Ministry of Education, Hunan University, Changsha 410082, China
| | - Jing Wu
- College of Environmental Science and Engineering and Key Laboratory of Environmental Biology and Pollution Control of Ministry of Education, Hunan University, Changsha 410082, China
| | - Jiangbo Shi
- College of Environmental Science and Engineering and Key Laboratory of Environmental Biology and Pollution Control of Ministry of Education, Hunan University, Changsha 410082, China
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12
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Simonin M, Colman BP, Anderson SM, King RS, Ruis MT, Avellan A, Bergemann CM, Perrotta BG, Geitner NK, Ho M, de la Barrera B, Unrine JM, Lowry GV, Richardson CJ, Wiesner MR, Bernhardt ES. Engineered nanoparticles interact with nutrients to intensify eutrophication in a wetland ecosystem experiment. ECOLOGICAL APPLICATIONS : A PUBLICATION OF THE ECOLOGICAL SOCIETY OF AMERICA 2018; 28:1435-1449. [PMID: 29939451 PMCID: PMC6635952 DOI: 10.1002/eap.1742] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/07/2017] [Revised: 03/29/2018] [Accepted: 04/09/2018] [Indexed: 05/29/2023]
Abstract
Despite the rapid rise in diversity and quantities of engineered nanomaterials produced, the impacts of these emerging contaminants on the structure and function of ecosystems have received little attention from ecologists. Moreover, little is known about how manufactured nanomaterials may interact with nutrient pollution in altering ecosystem productivity, despite the recognition that eutrophication is the primary water quality issue in freshwater ecosystems worldwide. In this study, we asked two main questions: (1) To what extent do manufactured nanoparticles affect the biomass and productivity of primary producers in wetland ecosystems? (2) How are these impacts mediated by nutrient pollution? To address these questions, we examined the impacts of a citrate-coated gold nanoparticle (AuNPs) and of a commercial pesticide containing Cu(OH)2 nanoparticles (CuNPs) on aquatic primary producers under both ambient and enriched nutrient conditions. Wetland mesocosms were exposed repeatedly with low concentrations of nanoparticles and nutrients over the course of a 9-month experiment in an effort to replicate realistic field exposure scenarios. In the absence of nutrient enrichment, there were no persistent effects of AuNPs or CuNPs on primary producers or ecosystem productivity. However, when combined with nutrient enrichment, both NPs intensified eutrophication. When either of these NPs were added in combination with nutrients, algal blooms persisted for >50 d longer than in the nutrient-only treatment. In the AuNP treatment, this shift from clear waters to turbid waters led to large declines in both macrophyte growth and rates of ecosystem gross primary productivity (average reduction of 52% ± 6% and 92% ± 5%, respectively) during the summer. Our results suggest that nutrient status greatly influences the ecosystem-scale impact of two emerging contaminants and that synthetic chemicals may be playing an under-appreciated role in the global trends of increasing eutrophication. We provide evidence here that chronic exposure to Au and Cu(OH)2 nanoparticles at low concentrations can intensify eutrophication of wetlands and promote the occurrence of algal blooms.
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Affiliation(s)
- Marie Simonin
- Center for the Environmental Implications of Nanotechnology (CEINT), Duke University, Durham, North Carolina, 27708, USA
- Department of Biology, Duke University, Durham, North Carolina, 27708, USA
| | - Benjamin P Colman
- Center for the Environmental Implications of Nanotechnology (CEINT), Duke University, Durham, North Carolina, 27708, USA
- Department of Ecosystem and Conservation Sciences, University of Montana, Missoula, Montana, 59812, USA
| | - Steven M Anderson
- Center for the Environmental Implications of Nanotechnology (CEINT), Duke University, Durham, North Carolina, 27708, USA
- Department of Biology, Duke University, Durham, North Carolina, 27708, USA
| | - Ryan S King
- Center for the Environmental Implications of Nanotechnology (CEINT), Duke University, Durham, North Carolina, 27708, USA
- Department of Biology, Baylor University, Waco, Texas, 76798, USA
| | - Matthew T Ruis
- Center for the Environmental Implications of Nanotechnology (CEINT), Duke University, Durham, North Carolina, 27708, USA
- Department of Biology, Duke University, Durham, North Carolina, 27708, USA
| | - Astrid Avellan
- Center for the Environmental Implications of Nanotechnology (CEINT), Duke University, Durham, North Carolina, 27708, USA
- Department of Civil and Environmental Engineering, Carnegie Mellon University, Pittsburgh, Pennsylvania, 15289, USA
| | - Christina M Bergemann
- Center for the Environmental Implications of Nanotechnology (CEINT), Duke University, Durham, North Carolina, 27708, USA
- Department of Biology, Duke University, Durham, North Carolina, 27708, USA
| | - Brittany G Perrotta
- Center for the Environmental Implications of Nanotechnology (CEINT), Duke University, Durham, North Carolina, 27708, USA
- Department of Biology, Baylor University, Waco, Texas, 76798, USA
| | - Nicholas K Geitner
- Center for the Environmental Implications of Nanotechnology (CEINT), Duke University, Durham, North Carolina, 27708, USA
- Department of Civil and Environmental Engineering, Duke University, Durham, North Carolina, 27708, USA
| | - Mengchi Ho
- Center for the Environmental Implications of Nanotechnology (CEINT), Duke University, Durham, North Carolina, 27708, USA
- Duke University Wetland Center, Nicholas School of the Environment, Duke University, Durham, North Carolina, 27708, USA
| | - Belen de la Barrera
- Center for the Environmental Implications of Nanotechnology (CEINT), Duke University, Durham, North Carolina, 27708, USA
- Duke University Wetland Center, Nicholas School of the Environment, Duke University, Durham, North Carolina, 27708, USA
| | - Jason M Unrine
- Center for the Environmental Implications of Nanotechnology (CEINT), Duke University, Durham, North Carolina, 27708, USA
- Department of Plant and Soil Sciences, University of Kentucky, Lexington, Kentucky, 40526, USA
| | - Gregory V Lowry
- Center for the Environmental Implications of Nanotechnology (CEINT), Duke University, Durham, North Carolina, 27708, USA
- Department of Civil and Environmental Engineering, Carnegie Mellon University, Pittsburgh, Pennsylvania, 15289, USA
| | - Curtis J Richardson
- Center for the Environmental Implications of Nanotechnology (CEINT), Duke University, Durham, North Carolina, 27708, USA
- Duke University Wetland Center, Nicholas School of the Environment, Duke University, Durham, North Carolina, 27708, USA
| | - Mark R Wiesner
- Center for the Environmental Implications of Nanotechnology (CEINT), Duke University, Durham, North Carolina, 27708, USA
- Department of Civil and Environmental Engineering, Duke University, Durham, North Carolina, 27708, USA
| | - Emily S Bernhardt
- Center for the Environmental Implications of Nanotechnology (CEINT), Duke University, Durham, North Carolina, 27708, USA
- Department of Biology, Duke University, Durham, North Carolina, 27708, USA
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13
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Rearick DC, Telgmann L, Hintelmann H, Frost PC, Xenopoulos MA. Spatial and temporal trends in the fate of silver nanoparticles in a whole-lake addition study. PLoS One 2018; 13:e0201412. [PMID: 30110351 PMCID: PMC6093604 DOI: 10.1371/journal.pone.0201412] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2018] [Accepted: 07/13/2018] [Indexed: 01/27/2023] Open
Abstract
Studies of the fate and toxicity of nanoparticles, including nanosilver (AgNPs), have been primarily conducted using bench scale studies over relatively short periods of time. To better understand the fate of AgNPs in natural aquatic ecosystems over longer time scales and ecological settings, we released suspensions of AgNPs (30–50 nm, capped with polyvinylpyrrolidone) into a boreal lake at the Experimental Lakes Area in Canada. Approximately 9 kg of silver was added from a shoreline point source from June to October 2014, which resulted in total Ag (TAg) concentrations of about 10 μg L-1 or less. In addition, dissolved Ag concentrations (DAg) were typically very low. Using single particle inductively coupled plasma mass spectrometry (sp-ICP-MS) analysis of grab samples, we found that the nanoparticles typically ranged in the 40–60 nm size class and were widely distributed throughout the lake, while larger aggregates (i.e. >100 nm) were infrequently detected. The highest occurrence of aggregates was found near the addition site; however, size distributions did not vary significantly among spatial locations or time suggesting rapid dispersal upon entry into the lake. Lake stratification at the thermocline was not a barrier to mobility of the AgNPs, as the particles were also detected in the hypolimnion. Environmental factors influenced Ag size distributions over sampling locations and time. Total dissolved phosphorus, bacterioplankton chlorophyll-a, and sampling time strongly correlated with aggregation and dissolution dynamics. AgNPs thus appear to be relatively mobile and persistent over the growing season in lake ecosystems.
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Affiliation(s)
- Daniel C. Rearick
- Environmental and Life Sciences Graduate Program, Trent University, Peterborough, Ontario, Canada
- * E-mail:
| | - Lena Telgmann
- Water Quality Centre, Department of Chemistry, Trent University, Peterborough, Ontario, Canada
| | - Holger Hintelmann
- Water Quality Centre, Department of Chemistry, Trent University, Peterborough, Ontario, Canada
| | - Paul C. Frost
- Department of Biology, Trent University, Peterborough, Ontario, Canada
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14
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Li D, Wu N, Tang S, Su G, Li X, Zhang Y, Wang G, Zhang J, Liu H, Hecker M, Giesy JP, Yu H. Factors associated with blooms of cyanobacteria in a large shallow lake, China. ENVIRONMENTAL SCIENCES EUROPE 2018; 30:27. [PMID: 30148024 PMCID: PMC6096964 DOI: 10.1186/s12302-018-0152-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/30/2018] [Accepted: 06/11/2018] [Indexed: 05/25/2023]
Abstract
BACKGROUND Eutrophication of freshwater systems can result in blooms of phytoplankton, in many cases cyanobacteria. This can lead to shifts in structure and functions of phytoplankton communities adversely affecting the quality of drinking water sources, which in turn impairs public health. Relationships between structures of phytoplankton communities and concentrations of the toxicant, microcystin-leucine-arginine (MC-LR), have not been well examined in large shallow lakes. The present study investigated phytoplankton communities at seven locations from January to December of 2015 in Tai Lake, and relationships between structures and diversities of phytoplankton communities and water quality parameters, including concentrations of MC-LR and metals, were analyzed. RESULTS A total of 124 taxa of phytoplankton were observed, and the predominant taxa were Microcystis sp. and Dolichospermum flos-aquae of Cyanophyta and Planctonema sp. of Chlorophyta. The greatest diversities of phytoplankton communities, as indicated by species richness, Simpson, Shannon-Wiener, the Berger and Parker, and the Pielou evenness indices, were observed in spring. Furthermore, productivity of phytoplankton was significantly and negatively correlated with diversities. These results demonstrated that Simpson, Shannon-Wiener, the Berger and Parker, and the Pielou evenness indices of phytoplankton communities were significantly related to trophic status and overall primary productivity in Tai Lake. In addition, temperature of surface water, pH, permanganate index, biochemical oxygen demand, total phosphorus, arsenic, total nitrogen/total phosphorous ratio, and MC-LR were the main factors associated with structures of phytoplankton communities in Tai Lake. CONCLUSION The present study provided helpful information on phytoplankton community structure and diversity in Tai Lake from January to December of 2015. Our findings demonstrated that Simpson, Shannon-Wiener, the Berger and Parker, and the Pielou evenness indices could be used to assess and monitor for status and trends in water quality of Tai Lake. In addition, MC-LR was one of the main factors associated with structures of phytoplankton communities in Tai Lake. The findings may help to address important ecological questions about the impact of a changing environment on biodiversity of lake ecosystems and the control of algae bloom. Further studies are needed to explore the relationship between MC-LR and phytoplankton communities in the laboratory.
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Affiliation(s)
- Di Li
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing, Jiangsu 210046 China
- Jiangsu Environmental Monitoring Center, Nanjing, Jiangsu 210036 China
| | - Naicheng Wu
- Department of Hydrology and Water Resources Management, Kiel University, Kiel, 24118 Germany
| | - Song Tang
- National Institute of Environmental Health, Chinese Center for Disease Control and Prevention, Beijing, 100021 China
| | - Guanyong Su
- Jiangsu Key Laboratory of Chemical Pollution Control and Resources Reuse, School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing, 210094 China
| | - Xuwen Li
- Jiangsu Environmental Monitoring Center, Nanjing, Jiangsu 210036 China
| | - Yong Zhang
- Jiangsu Environmental Monitoring Center, Nanjing, Jiangsu 210036 China
| | - Guoxiang Wang
- School of the Environment, Nanjing Normal University, Nanjing, Jiangsu 210023 China
| | - Junyi Zhang
- Wuxi Environmental Monitoring Center, Wuxi, Jiangsu 214000 China
| | - Hongling Liu
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing, Jiangsu 210046 China
| | - Markus Hecker
- Toxicology Centre, University of Saskatchewan, Saskatoon, SK S7N 5B3 Canada
- School of Environment and Sustainability, University of Saskatchewan, Saskatoon, SK S7N 5C3 Canada
| | - John P. Giesy
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing, Jiangsu 210046 China
- Department of Veterinary Biomedical Sciences and Toxicology Centre, University of Saskatchewan, Saskatoon, SK S7N5B3 Canada
- Department of Zoology and Center for Integrative Toxicology, Michigan State University, East Lansing, MI 48824 USA
- School of Biological Sciences, University of Hong Kong, Hong Kong, SAR China
| | - Hongxia Yu
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing, Jiangsu 210046 China
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15
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Ranjani A, Gopinath PM, Ananth S, Narchonai G, Santhanam P, Thajuddin N, Dhanasekaran D. Multidimensional dose–response toxicity exploration of silver nanoparticles from Nocardiopsis flavascens RD30. APPLIED NANOSCIENCE 2018. [DOI: 10.1007/s13204-018-0824-7] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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16
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Conine AL, Rearick DC, Xenopoulos MA, Frost PC. Variable silver nanoparticle toxicity to Daphnia in boreal lakes. AQUATIC TOXICOLOGY (AMSTERDAM, NETHERLANDS) 2017; 192:1-6. [PMID: 28898784 DOI: 10.1016/j.aquatox.2017.09.004] [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: 07/06/2017] [Revised: 08/29/2017] [Accepted: 09/02/2017] [Indexed: 06/07/2023]
Abstract
Variable sensitivity of organisms to silver nanoparticles (AgNPs) caused by changes in physico-chemical variables in aquatic ecosystems is receiving increasing attention. Variables such as dissolved organic carbon, pH, light, the presence of algae and bacteria, dissolved oxygen and different ions have all been studied individually, but it is still unclear how these variables in combination alter AgNP toxicity in natural ecosystems. Here we examined AgNP toxicity on survival of wild-caught Daphnia using AgNP suspensions placed in water from several different lakes at the IISD-Experimental Lakes Area, which span a gradient of water quality parameters. The partitioning of AgNPs between particulate and dissolved organic matter fractions was also assessed due to the potential for algal sequestration and detoxification of AgNPs. We found that toxicity varied between lakes with LC50 values ranging between 34 and 292μg AgL-1. Time of year in terms of days since ice-off and carbon to nitrogen ratios of particulate matter were the major predictors of toxicity between ecosystems. Total dissolved phosphorus, dissolved organic carbon, and particulate carbon to phosphorus ratios also played minor roles in influencing survival of Daphnia between water types. We found variable partitioning of silver into the particulate fraction within lakes and no significant differences between lakes. Silver associated with particulate organic matter increased with increasing concentrations of AgNPs in the ecosystem. Overall, we found strong evidence that AgNP toxicity is highly context dependent in natural lake ecosystems.
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Affiliation(s)
- Andrea L Conine
- Environmental and Life Sciences Graduate Program, Trent University, Peterborough, Ontario, K9J 7B8, Canada.
| | - Daniel C Rearick
- Environmental and Life Sciences Graduate Program, Trent University, Peterborough, Ontario, K9J 7B8, Canada
| | | | - Paul C Frost
- Department of Biology, Trent University, Peterborough, Ontario, K9J 7B8, Canada
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17
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Lodeiro P, Browning TJ, Achterberg EP, Guillou A, El-Shahawi MS. Mechanisms of silver nanoparticle toxicity to the coastal marine diatom Chaetoceros curvisetus. Sci Rep 2017; 7:10777. [PMID: 28883535 PMCID: PMC5589759 DOI: 10.1038/s41598-017-11402-x] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2017] [Accepted: 08/23/2017] [Indexed: 12/14/2022] Open
Abstract
Inputs of silver nanoparticles (AgNPs) to marine waters continue to increase yet mechanisms of AgNPs toxicity to marine phytoplankton are still not well resolved. This study reports a series of toxicity experiments on a representative coastal marine diatom species Chaetoceros curvisetus using the reference AgNP, NM-300K. Exposure to AgNPs resulted in photosynthetic impairment and loss of diatom biomass in proportion to the supplied AgNP dose. The underlying mechanism of toxicity was explored via comparing biological responses in parallel experiments. Diatom responses to AgNP, free Ag(I) species, and dialysis bag-retained AgNP treatments showed marked similarity, pointing towards a dominant role of Ag(I) species uptake, rather than NPs themselves, in inducing the toxic response. In marked contrast to previous studies, addition of the organic complexing agent cysteine (Cys) alongside Ag only marginally moderated toxicity, implying AgCys- complexes were bioavailable to this diatom species. A preliminary field experiment with a natural phytoplankton community in the southeast Atlantic Ocean showed no significant toxic response at a NM-300 K concentration that resulted in ~40% biomass loss in the culture studies, suggesting a modulating effect of natural seawaters on Ag toxicity.
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Affiliation(s)
- Pablo Lodeiro
- Ocean and Earth Science, University of Southampton, National Oceanography Centre, European Way, SO14 3ZH, Southampton, UK. .,GEOMAR Helmholtz Centre for Ocean Research Kiel, Wischhofstraße 1-3, 24148, Kiel, Germany.
| | - Thomas J Browning
- GEOMAR Helmholtz Centre for Ocean Research Kiel, Wischhofstraße 1-3, 24148, Kiel, Germany
| | - Eric P Achterberg
- Ocean and Earth Science, University of Southampton, National Oceanography Centre, European Way, SO14 3ZH, Southampton, UK.,GEOMAR Helmholtz Centre for Ocean Research Kiel, Wischhofstraße 1-3, 24148, Kiel, Germany
| | - Aurélie Guillou
- GEOMAR Helmholtz Centre for Ocean Research Kiel, Wischhofstraße 1-3, 24148, Kiel, Germany
| | - Mohammad S El-Shahawi
- Department of Chemistry, Faculty of Science, Damietta University, Damietta, Egypt.,Department of Chemistry, Faculty of Science, King Abdulaziz University, P. O. Box 80203, Jeddah, 21589, Jeddah, Saudi Arabia
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18
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Vincent JL, Paterson MJ, Norman BC, Gray EP, Ranville JF, Scott AB, Frost PC, Xenopoulos MA. Chronic and pulse exposure effects of silver nanoparticles on natural lake phytoplankton and zooplankton. ECOTOXICOLOGY (LONDON, ENGLAND) 2017; 26:502-515. [PMID: 28233158 DOI: 10.1007/s10646-017-1781-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 02/13/2017] [Indexed: 06/06/2023]
Abstract
The increasing use of silver nanoparticles (AgNPs) in consumer products raises concerns regarding the environmental exposure and impact of AgNPs on natural aquatic environments. Here, we investigated the effects of environmentally relevant AgNP concentrations on the natural plankton communities using in situ enclosures. Using twelve lake enclosures, we tested the hypotheses that AgNP concentration, dosing regimen, and capping agent (poly-vinyl pyrrolidone (PVP) vs. citrate) exhibit differential effects on plankton communities. Each of the following six treatments was replicated twice: control (no AgNPs added), low, medium, and high chronic PVP treatments (PVP-capped AgNPs added continuously, with target nominal concentrations of 4, 16, and 64 μg/L, respectively), citrate treatment (citrate-capped AgNPs added continuously, target nominal concentrations of 64 μg/L), and pulse treatment (64 μg/L PVP-AgNPs added as a single dose). Although Ag accumulated in the phytoplankton, no statistically significant treatment effect was found on phytoplankton community structure or biomass. In contrast, as AgNP exposure rate increased, zooplankton abundance generally increased while biomass and species richness declined. We also observed a shift in the size structure of zooplankton communities in the chronic AgNP treatments. In the pulse treatments, zooplankton abundance and biomass were reduced suggesting short periods of high AgNP concentrations affect zooplankton communities differently than chronic exposures. We found no evidence that capping agent affected AgNP toxicity on either community. Overall, our study demonstrates variable AgNP toxicity between trophic levels with stronger AgNP effects on zooplankton. Such effects on zooplankton are troubling and indicate that AgNP contamination could affect aquatic food webs.
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Affiliation(s)
- Jennifer L Vincent
- Environmental and Life Sciences Graduate Program, Trent University, Peterborough, ON, Canada
| | | | - Beth C Norman
- Department of Biology, Trent University, Peterborough, ON, Canada
| | - Evan P Gray
- Department of Civil and Environmental Engineering, Colorado School of Mines, Golden, CO, USA
| | - James F Ranville
- Department of Chemistry and Geochemistry, Colorado School of Mines, Golden, CO, USA
| | - Andrew B Scott
- Department of Biology, Trent University, Peterborough, ON, Canada
| | - Paul C Frost
- Department of Biology, Trent University, Peterborough, ON, Canada
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19
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Miao L, Wang C, Hou J, Wang P, Ao Y, Li Y, Yao Y, Lv B, Yang Y, You G, Xu Y. Influence of silver nanoparticles on benthic oxygen consumption of microbial communities in freshwater sediments determined by microelectrodes. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2017; 224:771-778. [PMID: 28108159 DOI: 10.1016/j.envpol.2017.01.017] [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: 07/29/2016] [Revised: 12/28/2016] [Accepted: 01/10/2017] [Indexed: 06/06/2023]
Abstract
The increased use of silver nanoparticles (AgNPs) will inevitably result in the release of these particles into aquatic environments, with sediments as a substantial sink. However, we do not know whether AgNPs present potential impacts in sediment functioning. In this study, a microcosm approach was constructed, and the potential impacts of AgNPs and PVP-coated AgNPs on oxygen consumption in freshwater sediments (collected from Taihu Lake) were determined using oxygen microelectrodes. To our knowledge, this is the first time that microelectrodes have been used to estimate the impacts of AgNPs in sediments. The steady-state oxygen microprofiles showed that environmental relevant concentration (1 mg/L nano-Ag) did not lead to an apparent change in the oxygen consumption rates of benthic microbial communities in sediment. The addition of 10 mg/L uncoated AgNPs resulted in remarkable differences in the oxygen concentration profiles within 4-5 h and significantly inhibited the oxygen consumption of benthic microbial communities in the upper sediment layer (∼1 mm) after 100 h. Simultaneously, an increase of oxygen consumption in sediment lower zones was observed. These results may suggest that aerobic microorganisms in the upper layer of the sediment reduced metabolic activity to avoid the toxic stress from AgNPs. Concomitantly, facultative aerobes below the metabolically active upper layer switched from fermentation or anaerobic respiration to aerobic respiration as oxygen bioavailability increased in the lower zones of the sediment. In addition, PVP coating reduced the nanotoxicity of AgNPs in benthic microorganisms due to the decreased dissolution of AgNPs in the filtered overlying water, a phenomenon that merits further investigation.
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Affiliation(s)
- 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
| | - 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
| | - Yanhui Ao
- 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
| | - Yi Li
- 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
| | - Yu Yao
- 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
| | - 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
| | - 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
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20
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Tang Y, Xin H, Malkoske T, Yin D. The Toxicity of Nanoparticles to Algae. BIOACTIVITY OF ENGINEERED NANOPARTICLES 2017. [DOI: 10.1007/978-981-10-5864-6_1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/11/2023]
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21
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Conine AL, Frost PC. Variable toxicity of silver nanoparticles to Daphnia magna: effects of algal particles and animal nutrition. ECOTOXICOLOGY (LONDON, ENGLAND) 2017; 26:118-126. [PMID: 27909840 DOI: 10.1007/s10646-016-1747-2] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 11/16/2016] [Indexed: 06/06/2023]
Abstract
Aquatic environments vary widely in aspects other than their physicochemical properties that could alter the toxicity of novel contaminants. One factor that could affect chemical toxicity to aquatic consumers is their nutritional environment as it can strongly affect their physiology and life history. Nutrition has the potential to alter an organism's response to the toxin or how the toxin interacts with the consumer through its food. Here we determined how growth and survival responses of Daphnia to an emerging contaminant, silver nanoparticles (AgNPs), are affected by the presence of food and its stoichiometric food quality. We used a series of survival tests, each slightly modified, to determine whether variable toxicity in different nutritional environments resulted from algal sequestration of AgNPs in a nontoxic form or from changes to the nutritional status of the test animals. We found that the presence of algae, of good or poor quality, reduced the toxicity of AgNPs on animal growth and survival. However, the decrease in AgNP toxicity was greater for animals consuming P-rich compared to P-poor food. We found evidence that this effect of food quality was due to greater algal uptake of AgNPs by P-rich than by P-stressed algae. However, we also found animal nutrition, in the absence of algal AgNP binding, could affect toxicity with P-nourished animals surviving slightly better when exposed to AgNPs compared to their P-stressed counterparts. Our results show an important role for algal particles and their P content in determining the toxicity of AgNPs in natural waters primarily due to their binding and uptake abilities and, less so, to their effects on animal nutrition.
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Affiliation(s)
- Andrea L Conine
- Environmental and Life Sciences Graduate Program, Trent University, Peterborough, ON, K9J 7B8, Canada.
| | - Paul C Frost
- Department of Biology, Trent University, Peterborough, ON, K9J 7B8, Canada
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22
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A new extracellular von Willebrand A domain-containing protein is involved in silver uptake in Microcystis aeruginosa exposed to silver nanoparticles. Appl Microbiol Biotechnol 2016; 100:8955-63. [DOI: 10.1007/s00253-016-7728-9] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2016] [Revised: 06/30/2016] [Accepted: 07/05/2016] [Indexed: 12/28/2022]
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23
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Wang S, Lv J, Ma J, Zhang S. Cellular internalization and intracellular biotransformation of silver nanoparticles in Chlamydomonas reinhardtii. Nanotoxicology 2016; 10:1129-35. [DOI: 10.1080/17435390.2016.1179809] [Citation(s) in RCA: 51] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- Songshan Wang
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, P.R. China and
| | - Jitao Lv
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, P.R. China and
| | - Jingyuan Ma
- Shanghai Synchrotron Radiation Facility, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai, P.R. China
| | - Shuzhen Zhang
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, P.R. China and
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24
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Huang J, Cheng J, Yi J. Impact of silver nanoparticles on marine diatom Skeletonema costatum. J Appl Toxicol 2016; 36:1343-54. [PMID: 27080522 DOI: 10.1002/jat.3325] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2015] [Revised: 02/09/2016] [Accepted: 02/28/2016] [Indexed: 11/09/2022]
Abstract
When silver nanoparticles (AgNPs) are used commercially at a large scale, they infiltrate the environment at a rapid pace. However, the impact of large quantities of AgNPs on aquatic ecosystems is still largely unknown. In aquatic ecosystems, the phytoplanktons have a vital ecological function and, therefore, the potential impact of AgNPs on the microalgae community has elicited substantial concern. Therefore, in this study, the impacts of AgNPs on a marine diatom, the Skeletonema costatum, are investigated, with a focus on their photosynthesis and associated mechanisms. Exposure to AgNPs at a concentration of 0.5 mg l(-1) significantly induces excess intracellular reactive oxygen species (ROS, 122%) and reduces 28% of their cell viability. More importantly, exposure to AgNPs reduces the algal chlorophyll-a content. Scanning electron microscopy (SEM) was conducted, which revealed that AgNPs obstruct the light absorption of algae because they adhere to their surface. The maximum photochemical efficiency of photosystem II (Fv/Fm) demonstrates that exposure to AgNPs significantly inhibits the conversion of light energy into photosynthetic electron transport. Moreover, the genes of the photosystem II reaction center protein (D1) are significantly down-regulated (P < 0.05) upon exposure to 5 mg l(-1) AgNPs. These results suggest that the physical adhesion and effects of shading of AgNPs on algae might affect their light energy delivery system and damage the crucial protein function of PSII. The photosynthesis inhibition effect of AgNPs is largely different from Ag(+) . This study shows that AgNPs at higher concentrations might have serious consequences for the succession of the phytoplankton communities and aquatic ecosystem equilibrium. Copyright © 2016 John Wiley & Sons, Ltd.
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Affiliation(s)
- Jun Huang
- State Key Laboratory of Estuarine and Coastal Research, East China Normal University, Shanghai, 200062, China.,City University of Hong Kong Shenzhen Research Institute, Shenzhen, 518057, China
| | - Jinping Cheng
- State Key Laboratory of Estuarine and Coastal Research, East China Normal University, Shanghai, 200062, China.,City University of Hong Kong Shenzhen Research Institute, Shenzhen, 518057, China.,Environmental Science Programs, School of Science, Hong Kong University of Science and Technology, Clear Water bay, Kowloon, Hong Kong, China
| | - Jun Yi
- State Key Laboratory of Estuarine and Coastal Research, East China Normal University, Shanghai, 200062, China.,City University of Hong Kong Shenzhen Research Institute, Shenzhen, 518057, China
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25
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Doolette CL, McLaughlin MJ, Kirby JK, Navarro DA. Bioavailability of silver and silver sulfide nanoparticles to lettuce (Lactuca sativa): Effect of agricultural amendments on plant uptake. JOURNAL OF HAZARDOUS MATERIALS 2015; 300:788-795. [PMID: 26322966 DOI: 10.1016/j.jhazmat.2015.08.012] [Citation(s) in RCA: 57] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/13/2015] [Revised: 07/06/2015] [Accepted: 08/07/2015] [Indexed: 06/04/2023]
Abstract
Silver nanoparticles (AgNPs) can enter terrestrial systems as sulfidised AgNPs (Ag2S-NPs) through the application of biosolids to soil. However, the bioavailability of Ag2S-NPs in soils is unknown. The two aims of this study were to investigate (1) the bioavailability of Ag to lettuce (Lactuca sativa) using a soil amended with biosolids containing Ag2S-NPs and (2) the effect of commonly used agricultural fertilisers/amendments on the bioavailability of Ag, AgNPs and Ag2S-NPs to lettuce. The study used realistic AgNP exposure pathways and exposure concentrations. The plant uptake of Ag from biosolids-amended soil containing Ag2S-NPs was very low for all Ag treatments (0.02%). Ammonium thiosulfate and potassium chloride fertilisation significantly increased the Ag concentrations of plant roots and shoots. The extent of the effect varied depending on the type of Ag. Ag2S-NPs, the realistic form of AgNPs in soil, had the lowest bioavailability. The potential risk of AgNPs in soils is low; even in the plants that had the highest Ag concentrations (Ag(+)+thiosulfate), only 0.06% of added Ag was found in edible plant parts (shoots). Results from the study suggest that agricultural practises must be considered when carrying out risk assessments of AgNPs in terrestrial systems; such practises can affect AgNP bioavailability.
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Affiliation(s)
- Casey L Doolette
- School of Agriculture Food & Wine, The University of Adelaide, PMB 1, Glen Osmond, SA 5064 Australia.
| | - Michael J McLaughlin
- School of Agriculture Food & Wine, The University of Adelaide, PMB 1, Glen Osmond, SA 5064 Australia; CSIRO Land and Water Flagship, Environmental Contaminant Mitigation and Technologies Research Program, Advanced Materials Transformational Capability Platform-Nanosafety, Waite Campus, Waite Road, Urrbrae, SA 5064, Australia.
| | - Jason K Kirby
- CSIRO Land and Water Flagship, Environmental Contaminant Mitigation and Technologies Research Program, Advanced Materials Transformational Capability Platform-Nanosafety, Waite Campus, Waite Road, Urrbrae, SA 5064, Australia.
| | - Divina A Navarro
- CSIRO Land and Water Flagship, Environmental Contaminant Mitigation and Technologies Research Program, Advanced Materials Transformational Capability Platform-Nanosafety, Waite Campus, Waite Road, Urrbrae, SA 5064, Australia.
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26
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Furtado LM, Norman BC, Xenopoulos MA, Frost PC, Metcalfe CD, Hintelmann H. Environmental Fate of Silver Nanoparticles in Boreal Lake Ecosystems. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2015; 49:8441-8450. [PMID: 26061763 DOI: 10.1021/acs.est.5b01116] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Silver nanoparticles (AgNPs) are currently the most commonly used nanoparticles in consumer products, yet their environmental fate in natural waters is poorly understood. In the present study, we investigated the persistence, transformations and distribution of polyvinylpyrrolidone (PVP) and citrate (CT) coated AgNPs in boreal lake mesocosms dosed either with a 6-week chronic regimen or a one-time pulse treatment at environmentally relevant dosing levels. In the chronic treatments, total Ag (TAg) concentrations reached ∼40% of target concentrations by the end of the experiment, and in the pulsed mesocosms, TAg dissipated slowly, with a half-life of ∼20 days. Sediments and periphyton on the mesocosm walls were an important sink for Ag. We found little effect of AgNP loading and surface coating on the persistence of TAg. There were also no differences between treatments in the degree of agglomeration of AgNPs, as indicated by the accumulation and distribution of Ag in the particulate and colloidal fractions. The low ionic strength and relatively high dissolved organic carbon concentrations in the lake water likely contributed to the relative stability of AgNP in the water column. The low concentrations of dissolved Ag (<1 μg L(-1)) in the size fraction <3 kDaA reflect the importance of natural ligands in controlling the concentrations of Ag released by dissolution of AgNPs. Overall, these data indicate that AgNPs are relatively stable in the tested lake environment and appear to result in quantities of highly toxic ionic Ag(+) that are below our limit of detection.
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Affiliation(s)
- Lindsay M Furtado
- †Trent University, Water Quality Center, Peterborough, Ontario K9J 7B8, Canada
| | - Beth C Norman
- ‡Trent University, Biology Department, Peterborough, Ontario K9J 7B8, Canada
| | | | - Paul C Frost
- ‡Trent University, Biology Department, Peterborough, Ontario K9J 7B8, Canada
| | - Chris D Metcalfe
- †Trent University, Water Quality Center, Peterborough, Ontario K9J 7B8, Canada
| | - Holger Hintelmann
- †Trent University, Water Quality Center, Peterborough, Ontario K9J 7B8, Canada
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27
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Norman BC, Xenopoulos MA, Braun D, Frost PC. Phosphorus Availability Alters the Effects of Silver Nanoparticles on Periphyton Growth and Stoichiometry. PLoS One 2015; 10:e0129328. [PMID: 26075715 PMCID: PMC4468089 DOI: 10.1371/journal.pone.0129328] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2015] [Accepted: 05/07/2015] [Indexed: 12/14/2022] Open
Abstract
Exposure to silver nanoparticles (AgNPs) may alter the structure and function of freshwater ecosystems. However, there remains a paucity of studies investigating the effects of AgNP exposure on freshwater communities in the natural environment where interactions with the ambient environment may modify AgNP toxicity. We used nutrient diffusing substrates to determine the interactive effects of AgNP exposure and phosphorus (P) enrichment on natural assemblages of periphyton in three Canadian Shield lakes. The lakes were all phosphorus poor and spanned a gradient of dissolved organic carbon availability. Ag slowly accumulated in the exposed periphyton, which decreased periphyton carbon and chlorophyll a content and increased periphyton C:P and N:P in the carbon rich lakes. We found significant interactions between AgNP and P treatments on periphyton carbon, autotroph standing crop and periphyton stoichiometry in the carbon poor lake such that P enhanced the negative effects of AgNPs on chlorophyll a and lessened the impact of AgNP exposure on periphyton stoichiometry. Our results contrast with those of other studies demonstrating that P addition decreases metal toxicity for phytoplankton, suggesting that benthic and pelagic primary producers may react differently to AgNP exposure and highlighting the importance of in situ assays when assessing potential effects of AgNPs in fresh waters.
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Affiliation(s)
- Beth C. Norman
- Department of Biology, Trent University, Peterborough, Ontario, Canada
- * E-mail:
| | | | - Daniel Braun
- Department of Biology, Trent University, Peterborough, Ontario, Canada
| | - Paul C. Frost
- Department of Biology, Trent University, Peterborough, Ontario, Canada
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28
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Zuo Y, Chen G, Zeng G, Li Z, Yan M, Chen A, Guo Z, Huang Z, Tan Q. Transport, fate, and stimulating impact of silver nanoparticles on the removal of Cd(II) by Phanerochaete chrysosporium in aqueous solutions. JOURNAL OF HAZARDOUS MATERIALS 2015; 285:236-244. [PMID: 25497315 DOI: 10.1016/j.jhazmat.2014.12.003] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/21/2014] [Revised: 11/06/2014] [Accepted: 12/04/2014] [Indexed: 06/04/2023]
Abstract
Despite the knowledge about increasing discharge of silver nanoparticles (AgNPs) into wastewater and its potential toxicity to microorganisms, the interaction of AgNPs with heavy metals in the biological removal process remains poorly understood. This study focused on the effect of AgNPs (hydrodynamic diameter about 24.3±0.37 nm) on the removal of cadmium (Cd(II)) by using a model white rot fungus species, Phanerochaete chrysosporium. Results showed that the biological removal capacity of Cd(II) increased with the concentration of AgNPs increasing from 0.1 mg/L to 1 mg/L. The maximum removal capacity (4.67 mg/g) was located at 1 mg/L AgNPs, and then decreased with further increasing AgNPs concentration, suggesting that an appropriate concentration of AgNPs has a stimulating effect on the removal of Cd(II) by P. chrysosporium instead of an inhibitory effect. Results of Ag(+) and total Ag concentrations in the solutions together with those of SEM and XRD demonstrated that added AgNPs had undergone oxidative dissolution and transported from the solution to the surface of fungal mycelia (up to 94%). FTIR spectra confirmed that amino, carboxyl, hydroxyl, and other reducing functional groups were involved in Cd(II) removal, AgNPs transportation, and the reduction of Ag(+) to AgNPs.
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Affiliation(s)
- Yanan Zuo
- 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
| | - Guiqiu 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.
| | - 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.
| | - Zhongwu 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
| | - Ming Yan
- 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
| | - Anwei Chen
- College of Resources and Environment, Hunan Agricultural University, Changsha 410128, PR China
| | - Zhi Guo
- 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
| | - Zhenzhen 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
| | - Qiong Tan
- 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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29
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Gil-Allué C, Schirmer K, Tlili A, Gessner MO, Behra R. Silver nanoparticle effects on stream periphyton during short-term exposures. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2015; 49:1165-1172. [PMID: 25513720 DOI: 10.1021/es5050166] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Silver nanoparticles (AgNP) are increasingly used as antimicrobials in consumer products. Subsequently released into aquatic environments, they are likely to come in contact with microbial communities like periphyton, which plays a key role as a primary producer in stream ecosystems. At present, however, very little is known about the effects of nanoparticles on processes mediated by periphyton communities. We assessed the effects of citrate-coated silver nanoparticles and silver ions (dosed as AgNO3) on five functional end points reflecting community and ecosystem-level processes in periphyton: photosynthetic yield, respiration potential, and the activity of three extracellular enzymes. After 2 h of exposure in experimental microcosms, AgNP and AgNO3 inhibited respiration and photosynthesis of periphyton and the activities of two of the three extracellular enzymes. Addition of a chelating ligand that complexes free silver ions indicated that, in most cases, toxicity of AgNP suspensions was caused by Ag(I) dissolved from the particles. However, these suspensions inhibited one of the extracellular enzymes (leucine aminopeptidase), pointing to a specific nanoparticle effect independent of the dissolved Ag(I). Thus, our results show that both silver nanoparticles and silver ions have potential to disrupt basic metabolic functions and enzymatic resource acquisition of stream periphyton.
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30
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Rana S, Samanta S, Bhattacharya S, Al-Khaled K, Goswami A, Chattopadhyay J. The effect of nanoparticles on plankton dynamics: a mathematical model. Biosystems 2014; 127:28-41. [PMID: 25448892 DOI: 10.1016/j.biosystems.2014.11.003] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2013] [Revised: 10/22/2014] [Accepted: 11/02/2014] [Indexed: 11/18/2022]
Abstract
A simple modification of the Rosenzweig-MacArthur predator (zooplankton)-prey (phytoplankton) model with the interference of the predators by adding the effect of nanoparticles is proposed and analyzed. It is assumed that the effect of these particles has a potential to reduce the maximum physiological per-capita growth rate of the prey. The dynamics of nanoparticles is assumed to follow a simple Lotka-Volterra uptake term. Our study suggests that nanoparticle induce growth suppression of phytoplankton population can destabilize the system which leads to limit cycle oscillation. We also observe that if the contact rate of nanoparticles and phytoplankton increases, then the equilibrium densities of phytoplankton as well as zooplankton decrease. Furthermore, we observe that the depletion/removal of nanoparticles from the aquatic system plays a crucial role for the stable coexistence of both populations. Our investigation with various types of functional response suggests that Beddington functional response is the most appropriate representation of the interaction of phytoplankton-nanoparticles in comparison to other widely used functional responses.
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Affiliation(s)
- Sourav Rana
- Department of Statistics, Visva-Bharati University, Santiniketan, West Bengal 731235, India
| | - Sudip Samanta
- Department of Biomathematics and Game Theory, University of Warsaw, ul. Banacha 2, 02-097 Warszawa, Poland
| | - Sabyasachi Bhattacharya
- Agricultural and Ecological Research Unit, Indian Statistical Institute, 203, B. T. Road, Kolkata 700108, India
| | - Kamel Al-Khaled
- Agricultural and Ecological Research Unit, Indian Statistical Institute, 203, B. T. Road, Kolkata 700108, India
| | - Arunava Goswami
- Agricultural and Ecological Research Unit, Indian Statistical Institute, 203, B. T. Road, Kolkata 700108, India
| | - Joydev Chattopadhyay
- Department of Mathematics and Statistics, Sultan Qaboos University, P.O. Box 36, Al-Khod 123, Oman.
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