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Combined Toxicity of Silver Nanoparticles with Hematite or Plastic Nanoparticles toward Two Freshwater Algae.
Huang, Bin; Wei, Zhong-Bo; Yang, Liu-Yan; Pan, Ke; Miao, Ai-Jun.
Afiliação
  • Huang B; Institute for Advanced Study , Shenzhen University , Nanhai Boulevard 3688 , Shenzhen , Guangdong Province 518060 , China.
  • Wei ZB; Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Optoelectronic Engineering , Shenzhen University , Shenzhen , Guangdong Province 518060 , China.
  • Yang LY; State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment , Nanjing University , Mail box 24, Xianlin Road 163 , Nanjing , Jiangsu Province 210023 , China.
  • Pan K; State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment , Nanjing University , Mail box 24, Xianlin Road 163 , Nanjing , Jiangsu Province 210023 , China.
  • Miao AJ; Institute for Advanced Study , Shenzhen University , Nanhai Boulevard 3688 , Shenzhen , Guangdong Province 518060 , China.
Environ Sci Technol ; 53(7): 3871-3879, 2019 04 02.
Article em En | MEDLINE | ID: mdl-30882224
In the natural environment, the interactions of different types of nanoparticles (NPs) may alter their toxicity, thus masking their true environmental effects. This study investigated the toxicity of silver NPs (AgNPs) combined with hematite (HemNPs) or polystyrene (PsNPs) NPs toward the freshwater algae Chlamydomonas reinhardtii and Ochromonas danica. The former has a cell wall and cannot internalize these NPs, while the latter without a cell wall can. Therefore, the toxicity of AgNPs toward C. reinhardtii was attributed to the released Ag ions, while AgNPs had direct toxic effects on O. danica. Moreover, nontoxic HemNPs ameliorated AgNP toxicity toward C. reinhardtii, by decreasing the bioavailability of Ag ions through adsorption. Despite their role as Ag-ion carriers, HemNPs still reduced the toxicity of AgNPs toward O. danica by competitively inhibiting AgNP uptake. In both algae, Ag accumulation fully accounted for the combined toxicity of AgNPs and HemNPs. However, the combined toxicity of AgNPs and PsNPs was complicated by their significant individual toxicities and the synergistic interactions of these particles with the algae, regardless of differences in Ag accumulation. Overall, in environmental assessments, considerations of the combined toxicity of dissimilar NPs will allow more accurate assessments of their environmental risks.
Assuntos

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Poluentes Químicos da Água / Nanopartículas Metálicas Idioma: En Revista: Environ Sci Technol Ano de publicação: 2019 Tipo de documento: Article País de afiliação: China País de publicação: Estados Unidos

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Poluentes Químicos da Água / Nanopartículas Metálicas Idioma: En Revista: Environ Sci Technol Ano de publicação: 2019 Tipo de documento: Article País de afiliação: China País de publicação: Estados Unidos