期刊
MARINE ENVIRONMENTAL RESEARCH
卷 133, 期 -, 页码 105-113出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.marenvres.2017.10.016
关键词
Ruditapes philippinarum; Nanoparticles; Humic substances; Bioavailability; Antioxidant enzymes; Integrated biological response
资金
- National Natural Science Foundation of China [41276104]
- Public Science and Technology Research Funds Projects of Ocean [201505034-2]
- China Scholarship Council (on behalf of the Chinese Ministry of Education)
- Duke University
Adsorption of dissolved organic matter (DOM) can alter the environmental fate, bioavailability and toxicity of silver nanoparticles (Ag NPs). However, a number of questions remain about DOM's ability to modify nano toxicity. Here, we examine the impact of humic acid (HA, as a model DOM) on the toxicity of Ag NPs (10 mu g L-1) in the marine clam Ruditapes philippinarwn. Results showed that DOM additions to Ag NP treatments reduce clam silver tissue burdens and the oxidative stress response. However, HA does not significantly affect the impact of Ag NPs on clam acetylcholinesterase activity and feeding behavior (measured as filtration rate). Overall, the integrated biological response index supports the conclusion that humic acid reduces the toxicity of Ag NPs, clearly indicating the importance of considering environmental factors when assessing potential risks posed by nanomaterials in natural settings.
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