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Li Y, Chen H, Wang F, Zhao F, Han X, Geng H, Gao L, Chen H, Yuan R, Yao J. Environmental behavior and associated plant accumulation of silver nanoparticles in the presence of dissolved humic and fulvic acid. Environ Pollut 2018; 243:1334-1342. [PMID: 30268984 DOI: 10.1016/j.envpol.2018.09.077] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/25/2018] [Revised: 08/28/2018] [Accepted: 09/15/2018] [Indexed: 06/08/2023]
Abstract
This work investigated the role of natural organic matter (NOM) in the environmental processes of silver nanoparticles (AgNP) and the uptake and accumulation of AgNP in wheat. Different NOMs (Suwannee River humic acids [SRHA], fulvic acid [FA]) and Ag elements (Ag(0) and Ag+) were incubated in a hydroponic media for 15 days. The results showed that the NOM (10 mg C L-1) altered the dissolution, stabilization, uptake and accumulation of AgNP. The dissolution of AgNP declined in the presence of NOM. Compared with FA, the dissolved Ag+ decreased much more from 0.30 mg L-1 to 0.10 mg L-1 in the presence of SRHA. The fluorescence quenching results indicated that SRHA exhibited stronger binding to Ag+ than that of FA, and the quenching constants Ksv were 0.1309 (SRHA) and 0.0074 (FA), respectively. CO, CH, COC, and MeOH were involved in the interaction between NOM and AgNP. The NOM decreased the accumulated content of Ag in wheat. Hence, NOM alleviated the inhibition of AgNP to wheat growth. SRHA reduced the Ag content of wheat roots approximately 3-fold. These results clearly indicated the importance of NOM on altering the behavior, fate and toxicity of AgNP in an environment.
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Affiliation(s)
- Yong Li
- School of Energy & Environmental Engineering, and Beijing Key Laboratory of Resource-oriented Treatment of Industrial Pollutants, University of Science and Technology Beijing, 30 Xueyuan Road, 100083, Beijing, China
| | - Haiyan Chen
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Science, 10012, Beijing, China
| | - Fei Wang
- School of Energy & Environmental Engineering, and Beijing Key Laboratory of Resource-oriented Treatment of Industrial Pollutants, University of Science and Technology Beijing, 30 Xueyuan Road, 100083, Beijing, China.
| | - Furong Zhao
- School of Energy & Environmental Engineering, and Beijing Key Laboratory of Resource-oriented Treatment of Industrial Pollutants, University of Science and Technology Beijing, 30 Xueyuan Road, 100083, Beijing, China
| | - Xiaomin Han
- School of Energy & Environmental Engineering, and Beijing Key Laboratory of Resource-oriented Treatment of Industrial Pollutants, University of Science and Technology Beijing, 30 Xueyuan Road, 100083, Beijing, China
| | - Huanhuan Geng
- School of Energy & Environmental Engineering, and Beijing Key Laboratory of Resource-oriented Treatment of Industrial Pollutants, University of Science and Technology Beijing, 30 Xueyuan Road, 100083, Beijing, China
| | - Ling Gao
- School of Energy & Environmental Engineering, and Beijing Key Laboratory of Resource-oriented Treatment of Industrial Pollutants, University of Science and Technology Beijing, 30 Xueyuan Road, 100083, Beijing, China
| | - Huilun Chen
- School of Energy & Environmental Engineering, and Beijing Key Laboratory of Resource-oriented Treatment of Industrial Pollutants, University of Science and Technology Beijing, 30 Xueyuan Road, 100083, Beijing, China
| | - Rongfang Yuan
- School of Energy & Environmental Engineering, and Beijing Key Laboratory of Resource-oriented Treatment of Industrial Pollutants, University of Science and Technology Beijing, 30 Xueyuan Road, 100083, Beijing, China
| | - Jun Yao
- School of Water Resource and Environmental Engineering, Sino-Hungarian Joint Laboratory of Environmental Science and Health, China University of Geosciences (Beijing), 29 Xueyuan Road, Haidian District, 100083, Beijing, China
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Bruneau A, Turcotte P, Pilote M, Gagné F, Gagnon C. Fate of silver nanoparticles in wastewater and immunotoxic effects on rainbow trout. Aquat Toxicol 2016; 174:70-81. [PMID: 26921728 DOI: 10.1016/j.aquatox.2016.02.013] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/26/2015] [Revised: 02/18/2016] [Accepted: 02/18/2016] [Indexed: 05/22/2023]
Abstract
Silver nanoparticles (AgNPs) are currently used in technology, medicine and consumer products, even though the fate and the ecotoxicological risks on aquatic organisms of these new materials are not well known. The purpose of this study was to investigate the fate, bioavailability of AgNPs and their effects on fish in presence of municipal effluents. Juvenile rainbow trout were exposed for 96h to 40μg/L of AgNPs or 4μg/L of dissolved silver (AgNO3) in diluted (10%) municipal wastewater. Silver (Ag) concentrations were measured both on water samples and fish tissues (liver and gills). Toxicity was investigated by following immunological parameters in the pronephros (viability, phagocytosis) and biomarkers in liver and gills (cyclooxygenase activity, lipid peroxidation, glutathione-S-transferase, metallothioneins, DNA strand breaks and labile zinc). Results indicated that AgNPs appeared as small non-charged aggregates in wastewaters (11.7±1.4nm). In gills, the exposure to AgNPs induced morphological modifications without visible nanoparticle bioaccumulation. Dissolved Ag(+) was bioavailable in diluted effluent and induced oxidative stress (lipid peroxidation), labile zinc and a marginal decrease in superoxide dismutase in fish gills. Ag(+) also increased significantly metallothionein levels and inhibited the DNA repair activity in the liver. Finally, the two silver forms were found in liver and induced immunosuppression and inflammation (increase in cyclooxygenase activity). This study demonstrated that both forms of Ag produced harmful effects and AgNPs in wastewater were bioavailable to fish despite of their formation of aggregates.
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Affiliation(s)
- A Bruneau
- Aquatic Contaminants Research Division, Environment Canada, 105 McGill Street, Montreal, Quebec H2Y 2E7, Canada.
| | - P Turcotte
- Aquatic Contaminants Research Division, Environment Canada, 105 McGill Street, Montreal, Quebec H2Y 2E7, Canada
| | - M Pilote
- Aquatic Contaminants Research Division, Environment Canada, 105 McGill Street, Montreal, Quebec H2Y 2E7, Canada
| | - F Gagné
- Aquatic Contaminants Research Division, Environment Canada, 105 McGill Street, Montreal, Quebec H2Y 2E7, Canada
| | - C Gagnon
- Aquatic Contaminants Research Division, Environment Canada, 105 McGill Street, Montreal, Quebec H2Y 2E7, Canada.
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