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Toxicity and accumulation of Cu and ZnO nanoparticles in Daphnia magna.
Environ Sci Technol. 2015 Apr 07; 49(7):4657-64.ES

Abstract

There is increasing recognition that the wide use of nanoparticles, such as Cu (CuNPs) and ZnO nanoparticles (ZnONPs), may pose risks to the environment. Currently there is insufficient insight in the contribution of metal-based nanoparticles and their dissolved ions to the overall toxicity and accumulation. To fill in this gap, we combined the fate assessment of CuNPs and ZnONPs in aquatic test media with the assessment of toxicity and accumulation of ions and particles present in the suspensions. It was found that at the LC50 level of Daphnia magna exposed to the nanoparticle suspensions, the relative contributions of ions released from CuNPs and ZnONPs to toxicity were around 26% and 31%, respectively, indicating that particles rather than the dissolved ions were the major source of toxicity. It was additionally found that at the low exposure concentrations of CuNPs and ZnONPs (below 0.05 and 0.5 mg/L, respectively) the dissolved ions were predominantly accumulated, whereas at the high exposure concentrations (above 0.1 mg/L and 1 mg/L, respectively), particles rather than the released ions played a dominant role in the accumulation process. Our results thus suggest that consideration on the contribution of dissolved ions to nanoparticle toxicity needs to be interpreted with care.

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Publisher Full Text (DOI)

Authors+Show Affiliations

Xiao Y
†Institute of Environmental Sciences (CML), Leiden University, 2300 RA Leiden, South Holland, The Netherlands.
Vijver MG
†Institute of Environmental Sciences (CML), Leiden University, 2300 RA Leiden, South Holland, The Netherlands.
Chen G
†Institute of Environmental Sciences (CML), Leiden University, 2300 RA Leiden, South Holland, The Netherlands.
Peijnenburg WJ
†Institute of Environmental Sciences (CML), Leiden University, 2300 RA Leiden, South Holland, The Netherlands. ‡National Institute of Public Health and the Environment, Center for the Safety of Substances and Products, 3720 BA Bilthoven, Utrecht, The Netherlands.

MeSH

AnimalsCopperDaphniaMetal NanoparticlesWater Pollutants, ChemicalZinc Oxide

Pub Type(s)

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

Language

eng

PubMed ID

25785366

Citation

Xiao, Yinlong, et al. "Toxicity and Accumulation of Cu and ZnO Nanoparticles in Daphnia Magna." Environmental Science & Technology, vol. 49, no. 7, 2015, pp. 4657-64.
Xiao Y, Vijver MG, Chen G, et al. Toxicity and accumulation of Cu and ZnO nanoparticles in Daphnia magna. Environ Sci Technol. 2015;49(7):4657-64.
Xiao, Y., Vijver, M. G., Chen, G., & Peijnenburg, W. J. (2015). Toxicity and accumulation of Cu and ZnO nanoparticles in Daphnia magna. Environmental Science & Technology, 49(7), 4657-64. https://doi.org/10.1021/acs.est.5b00538
Xiao Y, et al. Toxicity and Accumulation of Cu and ZnO Nanoparticles in Daphnia Magna. Environ Sci Technol. 2015 Apr 7;49(7):4657-64. PubMed PMID: 25785366.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Toxicity and accumulation of Cu and ZnO nanoparticles in Daphnia magna. AU - Xiao,Yinlong, AU - Vijver,Martina G, AU - Chen,Guangchao, AU - Peijnenburg,Willie J G M, Y1 - 2015/03/27/ PY - 2015/3/19/entrez PY - 2015/3/19/pubmed PY - 2016/1/1/medline SP - 4657 EP - 64 JF - Environmental science & technology JO - Environ Sci Technol VL - 49 IS - 7 N2 - There is increasing recognition that the wide use of nanoparticles, such as Cu (CuNPs) and ZnO nanoparticles (ZnONPs), may pose risks to the environment. Currently there is insufficient insight in the contribution of metal-based nanoparticles and their dissolved ions to the overall toxicity and accumulation. To fill in this gap, we combined the fate assessment of CuNPs and ZnONPs in aquatic test media with the assessment of toxicity and accumulation of ions and particles present in the suspensions. It was found that at the LC50 level of Daphnia magna exposed to the nanoparticle suspensions, the relative contributions of ions released from CuNPs and ZnONPs to toxicity were around 26% and 31%, respectively, indicating that particles rather than the dissolved ions were the major source of toxicity. It was additionally found that at the low exposure concentrations of CuNPs and ZnONPs (below 0.05 and 0.5 mg/L, respectively) the dissolved ions were predominantly accumulated, whereas at the high exposure concentrations (above 0.1 mg/L and 1 mg/L, respectively), particles rather than the released ions played a dominant role in the accumulation process. Our results thus suggest that consideration on the contribution of dissolved ions to nanoparticle toxicity needs to be interpreted with care. SN - 1520-5851 UR - https://www.unboundmedicine.com/medline/citation/25785366/Toxicity_and_accumulation_of_Cu_and_ZnO_nanoparticles_in_Daphnia_magna_ DB - PRIME DP - Unbound Medicine ER -