| pH对鲤鳃部微环境铜形态的影响 |
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| 引用本文： | 龙爱民,陶澍.pH对鲤鳃部微环境铜形态的影响[J].水生生物学报,2001,25(6):558-564. |
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| 作者姓名： | 龙爱民 陶澍 |
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| 作者单位： | 北京大学城市与环境学系, |
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| 基金项目： | 国家杰出青年科学基金(49525102)资助 |
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| 摘 要： | 利用Playle等设计的装置研究了不同pH条件及不同的铜暴露水平下鲤鳃部微环境pH值和粘液分泌量的变化，在此基础上用化学平衡计算方法探讨鱼鳃微环境中铜形态的变化。结果表明，在特定的pH和铜浓度范围内，鱼鳃微环境平衡pH略低于7，鱼鳃粘液分泌量随铜暴露水平提高而增加，与此同时，虽然CO2分泌量有所增加，没有观察到微环境pH随铜暴露量的变化。pH的升高，导致水相优势的游离态铜让位给羟基络合铜，粘液络合态铜的分额逐渭降低，但不会改变其络合当量与条件稳定络合常数。由于鱼鳃微环境对pH改变的调节作用，铜的形态分布变化幅度低于外部环境。
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| 关 键 词： | 鲤 鳃部微环境 pH值 铜形态 分布 |
| 文章编号： | 1000-3207(2001)06-0558-07 |
| 修稿时间： | 1999年9月12日 |
INFLUENCE OF pH ON COPPER SPECIATION IN THE GILL MICRO-ENVIRONMENT OF CYPRINUS CARPIO |
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| LONG Ai-min and TAO Shu.INFLUENCE OF pH ON COPPER SPECIATION IN THE GILL MICRO-ENVIRONMENT OF CYPRINUS CARPIO[J].Acta Hydrobiologica Sinica,2001,25(6):558-564. |
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| Authors: | LONG Ai-min and TAO Shu |
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| Abstract: | Concentrations of free copper and other parameters including pH, alkalinity, IC, and TOC in the gill micro - environment of Cyprinus carpio exposed to copper of various levels under various pH conditions were measured by using Playle' s apparatus. MINTEQA2 was applied to calculate the copper speciation. Single - site complexation model was employed for characterizing the complexation capacity of the gill mucus for copper. The copper speciation in both bulk solution and the gill micro - environment was discussed. |
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| Keywords: | Cyprinus carpio Gill micro-environment pH Copper Speciation |
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