| 摘要: |
| 生物毒性实验Cu2+，Zn2+等浓度与生物死亡率相关模式表明，海水中加入的Cu2+，Zn2+等浓度逐渐增高，生物死亡率相应增高；同一浓度下，死亡率随时间（24，48，72，96h）的增加逐步增高。实验加入Cu2+仅1 μg/L和Zn2+仅5 μg/L本底低浓度时，其毒性即已开始遵循相关模式。因此，比天然水中含量仅高1，2倍的Cu2+、Zn2+，离子的污染及毒性，就足以破坏鱼虾在河口的产卵、孵化及幼体成长。实验证明：河口水中Cu2+允许浓度＜1.5 μg/L，Zn2+＜10 μg/L。Cd2+与Pb2+，也应低于本底的1倍。生物活性的Cu2+与Zn2+
等，可用“无试剂防吸附物理涂汞电极阳极溶出法”分析，以区分“溶解Cu，Zn”中之无毒形式。以“天然水循环中Cu2+，Zn2+等离子均匀分布规律”之浓度为自然本底，就可分析对比污染程度，找出并控制污染源。 |
| 关键词: 河口水Cu2+与Zn2+ 自然本底分析 生态环境 |
| DOI： |
| 分类号: |
| 基金项目:国家自然科学基金资助项目，49176272号 |
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| ANALYSIS, SPECIES, DISTRIBUTION, TOXICITY AND ECOLOGICAL ENVIRONMENT OF Cu2+ ANDZn2+ IN ESTUARINE WATER |
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Gu Hongkan
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Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071
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| Abstract: |
| A fisheries prerequisite is water quality, especially that of estuarine waters. the original area of fishes and shrimps. The model relating Cu2+, Zn2+ concentration and organisms death rate shows that organisms mortality increases with Cu2+, Zn2+ concentration. In the same Cu2+, Zn2+ concentration, the organisms mortality increases with time (24, 48, 72, 96h). The toxicity follows the model. even if the additional Cu2+ (1 μg/L) and Zn2+ (5 μg/L) are as low as the ion baseline in natural water. Therefore, the contamination by Cu2+ and Zn2+ toxicity 1 - 2 times that of natural
baseline ion concentration can very adversely affect egg laying. hatching and growth of fishes and shrimps in estuarine water. The allowable concentration of Cu2+ and Zn2+ in estuarine water should be <1.5 μg/L and <10 μg/L respectively. The allowable concentration of Cd2+ and Pb2+ should also be lower than that of 1 time of the natural baseline. although their influences are less. Biologically active Cu2+,
Zn2+ etc., can be analyzed by the “Anti-adsorption physically coated mercury film electrode without reagent" ASV method to separate the no toxicity species in “Dissolved-Cu. Zn" for comparison with “Homogeneously distributed Cu2+ and Zn2+ in the natural water cycle" as natural ion baseline to show the contamination degree and to control its source. |
| Key words: Cu2+ and Zn2+ in estuarine water, Natural baseline analysis, Ecological environment |
