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| Toxicity assessments of fullerene to Daphnia magna: Acute toxicity and chronic toxicity |
| Received:December 07, 2016 |
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| KeyWord:Daphnia magna;nC60;acute toxicity;chronic toxicity |
| Author Name | Affiliation | E-mail | | HUANG Bo-ming | School of Environment, Tsinghua University, Beijing 100084, China
Graduate School at Shenzhen, Tsinghua University, Shenzhen 518000, China | | | LÜ Xiao-hui | Graduate School at Shenzhen, Tsinghua University, Shenzhen 518000, China
Shenzhen Graduate School, Harbin Institute of Technology, Shenzhen 518000, China | | | WANG Qiu-li | Liaoning Environmental Monitoring & Experiment Center, Shenyang 110161, China | | | ZHU Xiao-shan | Graduate School at Shenzhen, Tsinghua University, Shenzhen 518000, China | zhu.xiaoshan@sz.tsinghua.edu.cn | | ZHOU Jin | Graduate School at Shenzhen, Tsinghua University, Shenzhen 518000, China | | | CAI Zhong-hua | Graduate School at Shenzhen, Tsinghua University, Shenzhen 518000, China | |
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| Abstract: |
| The toxicity of fullerene(nC60) on aquatic organisms has received increasing concerns due to its proliferated applications and the increasing occurrence potential in water environments. The present study evaluated the acute and chronic toxicity of nC60 in a model animal, zooplankton Daphnia magna, using immobilization and mortality as the observation endpoints. The 48 h and 72 h EC50 values of nC60 were 25.3 mg·L-1 and 14.9 mg·L-1, respectively, and the LC50 values were 28.5 mg·L-1(48 h) and 16.3 mg·L-1(72 h), respectively. Moreover, nC60 exposure led to increasing hop and heartbeat frequencies of D. magna in the initial experiment stage, while the hop and heartbeat frequencies decreased with longer exposure time. During chronic exposure, the reproduction of D. magna was significantly repressed at the concentration of 1 mg·L-1. A significantly decrease of the total yield and the average yield of D. magna was observed after 21-d exposure. These results suggested that the leakage of nC60, could pose risks to the aquatic animals such as D. magna, which indicated that the aquatic toxicity of nC60 should not be ignored. |
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