| 摘要: |
| 以彩虹明樱蛤养殖壳高优势组(平均壳高为17.35±1.01mm)为实验动物,进行4种重金属离子Hg2+、C6+、Cu2+、Zn2+对彩虹明樱蛤的急性毒性和加和等毒性强度联合毒性试验。结果表明,彩虹明樱蛤对重金属的耐药性均随实验时间延长而缓慢降低,4种重金属离子毒性大小依次为Cu2+、Hg2+、Zn2+、Cr6+,其对彩虹明樱蛤96h的半致死质量浓度分别为0.0554 mg/L、0.1099 mg/L、2.2605 mg/L、19.6277 mg/L;Hg2+、Cr6+、Cu2+、Zn2+离子两两组合在加和等毒性强度下对彩虹明樱蛤96h联合急性毒性所呈现的致毒特征与离子间毒性强度匹配情形密切相关。 |
| 关键词: 重金属离子 急性毒性 联合毒性 彩虹明樱蛤 |
| DOI： |
| 分类号: |
| 基金项目:国家科技部星火计划项目,2003EA700104号;浙江省农业科技攻关项目,2006C32009号;浙江省高校中青年学科带头人科研基金资助,2003—2007 |
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| ACUTE TOXIC EFFECTS OF FOUR HEAVY METALS ON MOERELLA IRIDESCENS |
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WANG Zhi-Zheng, WANG Wei-Ding, YANG Yang, LU Zhen-Feng
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Zhejiang Ocean University, Zhoushan, 316004
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| Abstract: |
| Acute toxicity and joint toxicity of Hg2+, Cr6+, Cu2+, and Zn2+ on Moerella iridescens are studied. The animals were in average shell height of (17.35±1.01)mm, collected in Daixi Town, Daishan County of Zhejiang Province, from July to August in 2006. The result indicates that the resistance of M. iridescens against the 4 heavy metals decreases slowly as the experiment time last. The degree of the toxicity is in the order of Cu2+> Hg2+ > Zn2+ > Cr6+. The median lethal concentrations (LC50) of the metals at 96 hours to the animal are 0.0554, 0.1099, 2.2605, and 19.6277 mg/L, respectively. The joint toxicity at 96h by the pairs of Zn2+-Cr6+, Cr6+-Hg2+, Zn2+-Hg2+, Cu2+-Hg2+, Cu2+-Cr6+, and Cu2+-Zn2+ was found complicated in relation to the concentration, showing effects of synergism, addition, independence, and antagonism. In overall it depends on the toxicity of individual icon and its chelation. |
| Key words: Heavy metal ions, Acute toxicity, Joint toxicity, Moerella iridescens |
