Combined Toxicity of Silver Nanoparticles with Hematite or Plastic Nanoparticles toward Two Freshwater Algae

• DOI: 10.1021/acs.est.8b07001
• Publication Date: 2019-03-18T16:34:13Z
• Authors: Bin Huang; Zhong-Bo Wei; Liu-Yan Yang; Ke Pan; Ai-Jun Miao
• Keywords: Chlamydomonas reinhardtii; Silver nanoparticle; Nanotoxicology

In the natural environment, interactions of different types nanoparticles (NPs) may alter their toxicity, thus masking true environmental effects. This study investigated toxicity silver NPs (AgNPs) combined with hematite (HemNPs) or polystyrene (PsNPs) toward freshwater algae Chlamydomonas reinhardtii and Ochromonas danica. The former has a cell wall cannot internalize these NPs, while latter without can. Therefore, AgNPs C. was attributed to released Ag ions, had direct toxic effects on O. Moreover, nontoxic HemNPs ameliorated AgNP reinhardtii, by decreasing bioavailability ions through adsorption. Despite role as Ag-ion carriers, still reduced danica competitively inhibiting uptake. both algae, accumulation fully accounted for HemNPs. However, PsNPs complicated significant individual toxicities synergistic particles regardless differences in accumulation. Overall, assessments, considerations dissimilar will allow more accurate assessments risks.