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Silver nanoparticle toxicity to Daphnia magna is a function of dissolved silver concentration.
Environ Toxicol Chem. 2013 Oct; 32(10):2356-64.ET

Abstract

The most persistent question regarding the toxicity of silver nanoparticles (AgNPs) is whether this toxicity is due to the nanoparticles themselves or the silver ions (Ag(+)) they release. The present study investigates the role of surface coating and the presence of dissolved organic carbon on the toxicity of AgNPs to Daphnia magna and tests the hypothesis that the acute toxicity of AgNPs is a function of dissolved Ag produced by nanoparticle dissolution. Toxicity of silver nitrate (AgNO3) and AgNPs with surface coatings-gum arabic (AgGA), polyethylene glycol (AgPEG), and polyvinylpyrrolidone (AgPVP)-at 48 h was assessed in US Environmental Protection Agency moderately hard reconstituted water alone and augmented with Suwannee River dissolved organic carbon (DOC). As expected, AgNO3 was the most toxic to D. magna and AgPVPs were the least toxic. In general, Suwannee River DOC presence reduced the toxicity of AgNO3, AgGAs, and AgPEG, while the toxicity of AgPVPs was unaffected. The measured dissolved Ag concentrations for all AgNPs and AgNO3 at the 48-h median lethal concentration in moderately hard reconstituted water were similar. The presence of Suwannee River DOC decreased the ratio of measured dissolved Ag to measured total Ag concentration. These results support the hypothesis that toxicity of AgNPs to D. magna is a function of dissolved Ag concentration from these particles.

Authors+Show Affiliations

Clemson University Institute of Environmental Toxicology, Pendleton, South Carolina, USA. kimn@clemson.edu.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

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

Language

eng

PubMed ID

23761010

Citation

Newton, Kim M., et al. "Silver Nanoparticle Toxicity to Daphnia Magna Is a Function of Dissolved Silver Concentration." Environmental Toxicology and Chemistry, vol. 32, no. 10, 2013, pp. 2356-64.
Newton KM, Puppala HL, Kitchens CL, et al. Silver nanoparticle toxicity to Daphnia magna is a function of dissolved silver concentration. Environ Toxicol Chem. 2013;32(10):2356-64.
Newton, K. M., Puppala, H. L., Kitchens, C. L., Colvin, V. L., & Klaine, S. J. (2013). Silver nanoparticle toxicity to Daphnia magna is a function of dissolved silver concentration. Environmental Toxicology and Chemistry, 32(10), 2356-64. https://doi.org/10.1002/etc.2300
Newton KM, et al. Silver Nanoparticle Toxicity to Daphnia Magna Is a Function of Dissolved Silver Concentration. Environ Toxicol Chem. 2013;32(10):2356-64. PubMed PMID: 23761010.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Silver nanoparticle toxicity to Daphnia magna is a function of dissolved silver concentration. AU - Newton,Kim M, AU - Puppala,Hema L, AU - Kitchens,Christopher L, AU - Colvin,Vicki L, AU - Klaine,Stephen J, Y1 - 2013/08/09/ PY - 2013/02/22/received PY - 2013/03/18/revised PY - 2013/06/07/accepted PY - 2013/6/14/entrez PY - 2013/6/14/pubmed PY - 2013/12/18/medline KW - Daphnia magna KW - Dissolved organic carbon KW - Dissolved silver toxicity KW - Silver nanoparticle KW - Surface coating SP - 2356 EP - 64 JF - Environmental toxicology and chemistry JO - Environ Toxicol Chem VL - 32 IS - 10 N2 - The most persistent question regarding the toxicity of silver nanoparticles (AgNPs) is whether this toxicity is due to the nanoparticles themselves or the silver ions (Ag(+)) they release. The present study investigates the role of surface coating and the presence of dissolved organic carbon on the toxicity of AgNPs to Daphnia magna and tests the hypothesis that the acute toxicity of AgNPs is a function of dissolved Ag produced by nanoparticle dissolution. Toxicity of silver nitrate (AgNO3) and AgNPs with surface coatings-gum arabic (AgGA), polyethylene glycol (AgPEG), and polyvinylpyrrolidone (AgPVP)-at 48 h was assessed in US Environmental Protection Agency moderately hard reconstituted water alone and augmented with Suwannee River dissolved organic carbon (DOC). As expected, AgNO3 was the most toxic to D. magna and AgPVPs were the least toxic. In general, Suwannee River DOC presence reduced the toxicity of AgNO3, AgGAs, and AgPEG, while the toxicity of AgPVPs was unaffected. The measured dissolved Ag concentrations for all AgNPs and AgNO3 at the 48-h median lethal concentration in moderately hard reconstituted water were similar. The presence of Suwannee River DOC decreased the ratio of measured dissolved Ag to measured total Ag concentration. These results support the hypothesis that toxicity of AgNPs to D. magna is a function of dissolved Ag concentration from these particles. SN - 1552-8618 UR - https://www.unboundmedicine.com/medline/citation/23761010/Silver_nanoparticle_toxicity_to_Daphnia_magna_is_a_function_of_dissolved_silver_concentration_ L2 - https://doi.org/10.1002/etc.2300 DB - PRIME DP - Unbound Medicine ER -