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| Indicating Cd Pollution by Snail Cipangopaludina Chinensis Shell |
| Received:April 04, 2014 |
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| KeyWord:heavy metal;mud snail;shell;toxicity;accumulation |
| Author Name | Affiliation | E-mail | | DUAN Zheng-hua | School of Environmental Science and Safety Engineering, Tianjin University of Technology, Tianjin 300384, China | | | LI Ying-ying | School of Environmental Science and Safety Engineering, Tianjin University of Technology, Tianjin 300384, China | | | CHEN Jing | School of Environmental Science and Safety Engineering, Tianjin University of Technology, Tianjin 300384, China | | | DONG Wei | School of Environmental Science and Safety Engineering, Tianjin University of Technology, Tianjin 300384, China | | | LIANG Jing-jing | School of Environmental Science and Safety Engineering, Tianjin University of Technology, Tianjin 300384, China | | | YUE Jun-jie | School of Environmental Science and Safety Engineering, Tianjin University of Technology, Tianjin 300384, China | | | WANG Lei | Tianjin Key Laboratory of Environmental Remediation and Pollution Control(Nankai University), Tianjin 300071, China | wang2007@nankai.edu.cn |
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| Abstract: |
| Sensitive organisms can be used as an indicator of environmental pollution. An indoor experiment was conducted to study the toxic effects of heavy metal cadmium(Cd2+) on river snail Cipangopaludina Chinensis and its accumulation in soft and hard tissues of the snails using direct exposure and microcosm exposure. The 5 d half lethal concentration(LC50) of cadmium to river snail was 6.15 mg·L-1 under direct exposure. The growth rate of snail shell length could be considered as an effective biomarker of chronic Cd stress. Cadmium stimulated snail shell growth at 0.15 mg·kg-1, but inhibited it at 1.5 mg·kg-1. Cadmium could be accumulated in snail shell as well as in the soft tissue. The accumulation of Cd in soft and hard tissues increased with increased exposure time and concentrations. Moreover, Cd accumulation was more stable in the shell than in the soft tissue. The similar results were found in an insitu investigation of heavy metal pollution in the major landscape rivers in Tianjin. In conclusion, Cipangopaludina Chinensis shell could be an effective supplementary in biological monitoring of Cd pollution in freshwater environment. |
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