Combined toxicities of copper nanoparticles with carbon nanotubes on marine microalgae Skeletonema costatum

Environmental Science and Pollution Research International
Cai ZhangJinagtao Wang

Abstract

To investigate the combined toxicities of copper nanoparticles (nano-Cu) with carbon nanotubes (CNTs) on marine microalgae Skeletonema costatum, algal growth inhibition tests were carried out. Toxicities of nano-Cu with CNTs and without CNTs on microalgae were determined, respectively. Chlorophyll content and photosynthetic efficiency (ΦPSII) were determined to compare negative effects of nano-Cu with CNTs and without CNTs on photosynthesis. The concentration of Cu2+ released by nano-Cu into the medium was determined, and interactions between nano-Cu and CNTs were analyzed to study toxic mechanisms of combined toxicities of nano-Cu with CNTs. It was found that both nano-Cu and CNTs could inhibit the growth of the microalgae; however, the toxicity of CNTs on the microalgae was far lower than that of nano-Cu. The maximum growth inhibition ratio (IR) of nano-Cu on the microalgae was 86% appearing at 96 h under 1.0 mg/L nano-Cu treatment, while the maximum IR of CNTs on the microalgae was 58% at 96 h under 200 mg/L CNT treatment. CNTs could reduce the toxicity of nano-Cu on the microalgae in processes of growth and photosynthesis. Adsorption of Cu2+ on CNTs and aggregate between Cu and CNTs in the medium were main reasons for atten...Continue Reading

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Citations

Apr 17, 2019·Bulletin of Environmental Contamination and Toxicology·Xianliang YiMinghuo Wu
Feb 15, 2020·Marine Environmental Research·A GalloG Libralato
Apr 18, 2021·Ecotoxicology and Environmental Safety·Zezheng WangLicheng Peng
Sep 11, 2021·Environmental Science and Pollution Research International·Wenqiu HuangJiangtao Wang
Dec 26, 2018·Environmental Pollution·Zhi-Lin ZhuGuang-Zhou Liu
Jun 5, 2020·Ecotoxicology and Environmental Safety·Minh Kim NguyenYoung-Chul Lee

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