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Effects of water chemistry on the dissolution of ZnO nanoparticles and their toxicity to Escherichia coli.
Environ Pollut. 2013 Feb; 173:97-102.EP

Abstract

The dissolution of ZnO nanoparticles (nano-ZnO) plays an important role in the toxicity of nano-ZnO to the aquatic organisms. The effects of water chemistry such as pH, ionic components, and dissolved organic matter (DOM) on the dissolution of nano-ZnO and its toxicity to Escherichia coli (E. coli) were investigated in synthetic and natural water samples. The results showed that the toxicity of nano-ZnO to E. coli depended on not only free Zn(2+) but also the coexisting cations which could reduce the toxicity of Zn(2+). Increasing solution pH, HPO(4)(2), and DOM reduced the concentration of free Zn(2+) released from nano-ZnO, and thus lowered the toxicity of nano-ZnO. In addition, both Ca(2+) and Mg(2+) dramatically reduced the toxicity of Zn(2+) to E. coli. These results highlight the importance of water chemistry on the toxicity evaluation of nano-ZnO in natural waters.

Authors+Show Affiliations

Department of Environmental Science, Zhejiang University, Hangzhou 310058, China.No affiliation info availableNo affiliation info available

Pub Type(s)

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

Language

eng

PubMed ID

23202638

Citation

Li, Mei, et al. "Effects of Water Chemistry On the Dissolution of ZnO Nanoparticles and Their Toxicity to Escherichia Coli." Environmental Pollution (Barking, Essex : 1987), vol. 173, 2013, pp. 97-102.
Li M, Lin D, Zhu L. Effects of water chemistry on the dissolution of ZnO nanoparticles and their toxicity to Escherichia coli. Environ Pollut. 2013;173:97-102.
Li, M., Lin, D., & Zhu, L. (2013). Effects of water chemistry on the dissolution of ZnO nanoparticles and their toxicity to Escherichia coli. Environmental Pollution (Barking, Essex : 1987), 173, 97-102. https://doi.org/10.1016/j.envpol.2012.10.026
Li M, Lin D, Zhu L. Effects of Water Chemistry On the Dissolution of ZnO Nanoparticles and Their Toxicity to Escherichia Coli. Environ Pollut. 2013;173:97-102. PubMed PMID: 23202638.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Effects of water chemistry on the dissolution of ZnO nanoparticles and their toxicity to Escherichia coli. AU - Li,Mei, AU - Lin,Daohui, AU - Zhu,Lizhong, Y1 - 2012/11/28/ PY - 2012/07/25/received PY - 2012/10/09/revised PY - 2012/10/26/accepted PY - 2012/12/4/entrez PY - 2012/12/4/pubmed PY - 2013/2/5/medline SP - 97 EP - 102 JF - Environmental pollution (Barking, Essex : 1987) JO - Environ Pollut VL - 173 N2 - The dissolution of ZnO nanoparticles (nano-ZnO) plays an important role in the toxicity of nano-ZnO to the aquatic organisms. The effects of water chemistry such as pH, ionic components, and dissolved organic matter (DOM) on the dissolution of nano-ZnO and its toxicity to Escherichia coli (E. coli) were investigated in synthetic and natural water samples. The results showed that the toxicity of nano-ZnO to E. coli depended on not only free Zn(2+) but also the coexisting cations which could reduce the toxicity of Zn(2+). Increasing solution pH, HPO(4)(2), and DOM reduced the concentration of free Zn(2+) released from nano-ZnO, and thus lowered the toxicity of nano-ZnO. In addition, both Ca(2+) and Mg(2+) dramatically reduced the toxicity of Zn(2+) to E. coli. These results highlight the importance of water chemistry on the toxicity evaluation of nano-ZnO in natural waters. SN - 1873-6424 UR - https://www.unboundmedicine.com/medline/citation/23202638/Effects_of_water_chemistry_on_the_dissolution_of_ZnO_nanoparticles_and_their_toxicity_to_Escherichia_coli_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0269-7491(12)00465-4 DB - PRIME DP - Unbound Medicine ER -