Dissolution behavior of ZnO nanoparticles at environmentally relevant low concentrations in surface waters: Equilibrium and kinetics

Yi Chin Hsieh, Edward Suhendra, Chih Hua Chang, Wen Che Hou

研究成果: Article同行評審

1 引文 斯高帕斯(Scopus)

摘要

Environmentally relevant fate parameters are essential in accurate prediction of nanomaterial's exposure. This study investigates the dissolution kinetics and equilibrium of ZnO nanoparticles (ZnONPs) using environmentally relevant low concentrations (50–200 μg/L) of ZnONPs in river water and lake water samples, and a seawater-influenced river water. We found that ZnONPs at an initial concentration of 50 μg/L completely dissolved independent of water matrices, while at 100 and 200 μg/L the dissolution level of ZnONPs was strongly dependent on the water chemistry. Carbonate alkalinity was found to control the dissolution levels, and can react with dissolved Zn ion to form secondary solid product hydrozincite. An analysis of our kinetic data and comprehensive literature results reveals that the dissolution kinetic coefficients largely increased with decreased initial ZnONP concentrations especially in environmental water matrices. The result highlights the importance to measure and derive representative dissolution parameters of nanomaterials using environmentally relevant concentrations.

原文English
文章編號164091
期刊Science of the Total Environment
888
DOIs
出版狀態Published - 2023 8月 25

All Science Journal Classification (ASJC) codes

  • 環境工程
  • 環境化學
  • 廢物管理和處置
  • 污染

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