期刊
MARINE ENVIRONMENTAL RESEARCH
卷 158, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.marenvres.2020.105005
关键词
Copper nanoparticles; Microplastic; Combined toxicities; Skeletonema costatum
资金
- National Natural Science Foundation of China [41876078]
- Shandong Provincial Natural Science Foundation of China [ZR2018MD016]
- National Oceanic Administration Public Welfare Project [201505034]
- Special Fund for Basic Scientific Research in Central Colleges and Universities [201713059]
In order to investigate the combined toxicities of copper nanoparticles (nano-Cu) with microplastic on micro- algae Skeletonema costatum, growth inhibition tests were carried out. The toxic effects of copper nanoparticles and microplastic on the microalgae under singleness and coexistence conditions were investigated. Both copper nanoparticles and microplastic inhibited the growth of S. costatum. The growth inhibition ratio (IR) increased with the increasing of particle concentrations and incubation time. The toxicity of copper nanoparticles was reduced with the addition of microplastic. The concentrations of Cu2+ in the medium with or without addition of microplastic were determined. It was found that adsorption of Cu2+ on microplastic and aggregation between copper nanoparticles and microplastic are the main reasons for attenuation of toxicity of nano-Cu with adding microplastic. The adhesion and aggregate interactions between microalgae and nanomaterial were also approved by the observations through scanning electron microscopy.
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