| 天然水体中铜的形态及其对Q67淡水发光菌的毒性作用 |
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| 引用本文： | 黄圣彪,王子健.天然水体中铜的形态及其对Q67淡水发光菌的毒性作用[J].环境科学研究,2003,16(2):43-46. |
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| 作者姓名： | 黄圣彪 王子健 |
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| 作者单位： | 中国科学院,生态环境研究中心,环境水化学国家重点实验室,北京,100085 |
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| 基金项目： | 国际铜业协会资助项目(ICA-TPT0605)，中国科学院资助项目(KZCX2-410) |
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| 摘 要： | 通过铜加标实验,运用两步酸化阳极溶出伏安法(DAM-DPASV)得到官厅水库各水样对铜的络合容量,同时测定了水样在铜加标前后对Q67淡水发光菌的96h急性毒性.官厅水库各水样对铜的络合容量为26～128μg/L,与水样中DOC的含量成正比,络合容量随DOC含量的增加而升高.铜对Q67淡水发光菌的毒性随着水样对铜络合容量的增加而降低,相对于用总铜浓度表示的EC50而言,由电极有效态铜浓度(无机铜浓度)表示的EC50能够更好地预测天然水体中铜对Q67淡水发光菌的毒性.
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| 关 键 词： | 铜 络合容量 DOC 毒性 |
| 文章编号： | 1001-6929(2003)02-0043-04 |
| 收稿时间： | 2002/9/6 0:00:00 |
Speciation of Copper in Natural Waters and Its Toxicity to Q67 Freshwater Luminescence Baceria |
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| Affiliation: | Eco-Environmental Sciences,Chinese Academy of Sciences,Beijing 100085,China |
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| Abstract: | he complexation capacity of water samples in Guanting reservoir waters were determined by differential pulse anodic stripping voltammetry with a double acidification method (DAM-DPASV).96 h luminescence inhibitation tests on Q67 freshwater luminescence bacterium were used to assess the toxicity of copper.Complexation capacity in Guanting reservoir was in the range of 26～128 μg/L, and in direct proportion to the DOC content.The toxicity of copper to Q67 decreased with the increase of complexation capacity.The EC50 expressed as labile copper tended to be relatively constant in ranges of complexation capacity.Labile copper is therefore a better predictor of EC50 than total copper in natural water. |
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| Keywords: | copper complexation capacity DOC toxicity |
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