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| Combined toxicity of dimethoate, copper and zinc to aquatic organisms |
| Received:May 26, 2021 |
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| KeyWord:dimethoate;copper;zinc;photobacterium phoshoreum;zebrafish egg;combined toxicity |
| Author Name | Affiliation | E-mail | | DING Yingjie | Zhejiang Yangtze Delta Region Institute of Tsinghua University, Jiaxing 314006, China | | | ZHU Yin | Zhejiang Yangtze Delta Region Institute of Tsinghua University, Jiaxing 314006, China | | | SHEN Lingjin | Zhejiang Yangtze Delta Region Institute of Tsinghua University, Jiaxing 314006, China | | | CAI Jialing | Zhejiang Yangtze Delta Region Institute of Tsinghua University, Jiaxing 314006, China | 641544707@qq.com |
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| Abstract: |
| To study the combined toxicity of dimethoate, copper and zinc, photobacterium phoshoreum and zebrafish eggs were used as model organisms. The combined toxicity of dimethoate-copper and dimethoate-zinc was evaluated by mixture toxicity indices(MTI). Toxicity test of photobacterium phoshoreum:the EC50 of dimethoate, copper and zinc after 15 min exposure were 123, 0.53 mg·L-1 and 1.71 mg·L-1 respectively. The EC50 after 30 min were 122, 0.50 mg·L-1 and 1.54 mg·L-1. The MTI of dimethoate-copper and dimethoate-zinc after 15 min were 0.69 and 0.60. Toxicity test of zebrafish eggs:the LC50 of dimethoate, copper and zinc exposed after 72 h of exposure were 0.31, 1.67 mg·L-1 and 369 mg·L-1. The MTI of dimethoate-copper and dimethoate-zinc after 72 h were 0.70 and 0.75. The combined toxicity of dimethoate-copper and dimethoate-zinc was enhanced, and the overall toxicity showed a partially additive effect. Therefore, the residues of these two substances in the environment has the potential to cause harm to aquatic and other organisms. |
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