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Humic substances alleviate the aquatic toxicity of polyvinylpyrrolidone-coated silver nanoparticles to organisms of different trophic levels.
Environ Toxicol Chem. 2015 Jun; 34(6):1239-45.ET

Abstract

The present study investigated how humic substances (HS) modify the aquatic toxicity of silver nanoparticles (AgNPs) as these particles agglomerate in water and interact with HS. An alga species (Raphidocelis subcapitata), a cladoceran species (Chydorus sphaericus), and a freshwater fish larva (Danio rerio), representing organisms of different trophic levels, were exposed to colloids of the polyvinylpyrrolidone-coated AgNPs in the presence and absence of HS. Results show that the presence of HS alleviated the aquatic toxicity of the AgNP colloids to all the organisms in a dose-dependent manner. The particle size distribution of the AgNPs' colloidal particles shifted to lower values due to the presence of HS, implying that the decrease in the toxicity of the AgNP colloids cannot be explained by the variation of agglomeration size. The surface charge of the AgNPs was found to be more negative in the presence of high concentrations of HS, suggesting an electrostatic barrier by which HS might limit interactions between particles and algae cells; indeed, this effect reduced the algae toxicity. Observations on silver ions (Ag(+)) release show that HS inhibit AgNP dissolution, depending on the concentrations of HS. When toxic effects were expressed as a function of each Ag-species, toxicity of the free Ag(+) was found to be much higher than that of the agglomerated particles.

Authors+Show Affiliations

Center for Safety of Substances and Products, National Institute of Public Health and the Environment, Bilthoven, The Netherlands. Institute of Environmental Sciences, Leiden University, Leiden, The Netherlands. Key Laboratory of Industrial Ecology and Environmental Engineering, School of Environmental Science and Technology, Dalian University of Technology, Dalian, China.Center for Safety of Substances and Products, National Institute of Public Health and the Environment, Bilthoven, The Netherlands.Institute of Environmental Sciences, Leiden University, Leiden, The Netherlands.Center for Safety of Substances and Products, National Institute of Public Health and the Environment, Bilthoven, The Netherlands.Center for Safety of Substances and Products, National Institute of Public Health and the Environment, Bilthoven, The Netherlands.Center for Safety of Substances and Products, National Institute of Public Health and the Environment, Bilthoven, The Netherlands. Institute of Environmental Sciences, Leiden University, Leiden, The Netherlands.

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

25683234

Citation

Wang, Zhuang, et al. "Humic Substances Alleviate the Aquatic Toxicity of Polyvinylpyrrolidone-coated Silver Nanoparticles to Organisms of Different Trophic Levels." Environmental Toxicology and Chemistry, vol. 34, no. 6, 2015, pp. 1239-45.
Wang Z, Quik JT, Song L, et al. Humic substances alleviate the aquatic toxicity of polyvinylpyrrolidone-coated silver nanoparticles to organisms of different trophic levels. Environ Toxicol Chem. 2015;34(6):1239-45.
Wang, Z., Quik, J. T., Song, L., Van Den Brandhof, E. J., Wouterse, M., & Peijnenburg, W. J. (2015). Humic substances alleviate the aquatic toxicity of polyvinylpyrrolidone-coated silver nanoparticles to organisms of different trophic levels. Environmental Toxicology and Chemistry, 34(6), 1239-45. https://doi.org/10.1002/etc.2936
Wang Z, et al. Humic Substances Alleviate the Aquatic Toxicity of Polyvinylpyrrolidone-coated Silver Nanoparticles to Organisms of Different Trophic Levels. Environ Toxicol Chem. 2015;34(6):1239-45. PubMed PMID: 25683234.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Humic substances alleviate the aquatic toxicity of polyvinylpyrrolidone-coated silver nanoparticles to organisms of different trophic levels. AU - Wang,Zhuang, AU - Quik,Joris T K, AU - Song,Lan, AU - Van Den Brandhof,Evert-Jan, AU - Wouterse,Marja, AU - Peijnenburg,Willie J G M, Y1 - 2015/04/17/ PY - 2014/05/20/received PY - 2014/11/07/revised PY - 2015/02/09/accepted PY - 2015/2/17/entrez PY - 2015/2/17/pubmed PY - 2015/11/10/medline KW - Aquatic toxicology KW - Humic substances KW - Silver ions KW - Silver nanoparticles SP - 1239 EP - 45 JF - Environmental toxicology and chemistry JO - Environ Toxicol Chem VL - 34 IS - 6 N2 - The present study investigated how humic substances (HS) modify the aquatic toxicity of silver nanoparticles (AgNPs) as these particles agglomerate in water and interact with HS. An alga species (Raphidocelis subcapitata), a cladoceran species (Chydorus sphaericus), and a freshwater fish larva (Danio rerio), representing organisms of different trophic levels, were exposed to colloids of the polyvinylpyrrolidone-coated AgNPs in the presence and absence of HS. Results show that the presence of HS alleviated the aquatic toxicity of the AgNP colloids to all the organisms in a dose-dependent manner. The particle size distribution of the AgNPs' colloidal particles shifted to lower values due to the presence of HS, implying that the decrease in the toxicity of the AgNP colloids cannot be explained by the variation of agglomeration size. The surface charge of the AgNPs was found to be more negative in the presence of high concentrations of HS, suggesting an electrostatic barrier by which HS might limit interactions between particles and algae cells; indeed, this effect reduced the algae toxicity. Observations on silver ions (Ag(+)) release show that HS inhibit AgNP dissolution, depending on the concentrations of HS. When toxic effects were expressed as a function of each Ag-species, toxicity of the free Ag(+) was found to be much higher than that of the agglomerated particles. SN - 1552-8618 UR - https://www.unboundmedicine.com/medline/citation/25683234/Humic_substances_alleviate_the_aquatic_toxicity_of_polyvinylpyrrolidone_coated_silver_nanoparticles_to_organisms_of_different_trophic_levels_ L2 - https://doi.org/10.1002/etc.2936 DB - PRIME DP - Unbound Medicine ER -