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应用生态学报 ›› 2002, Vol. ›› Issue (1): 118-120.

• 研究论文 • 上一篇    下一篇

鲤鱼鳃部微环境的pH特征及其对吸附态铜的解吸影响

龙爱民, 陶澍, 刘长发   

  1. 北京大学城市与环境学系, 北京 100871
  • 收稿日期:1999-11-04 修回日期:2000-03-13 出版日期:2002-01-15
  • 通讯作者: 陶澍
  • 基金资助:
    国家杰出青年基金资助项目(49525102)

pH of the gill micro-environment of Cyprinus carpio and its effect on the desorption of adsorbed Cu

LONG Aimin, TAO Shu, LIU Changfa   

  1. Department of Urban and Environment Sciences, Peking University, Beijing 100871
  • Received:1999-11-04 Revised:2000-03-13 Online:2002-01-15

摘要: 研究了不同pH条件下鲤鱼(Cyprinus carpio)鳃部微环境pH及CO2的变化情况以及鳃部微环境出水对水铝矿吸附态铜的的淋洗效率.结果表明,鱼鳃微环境的平衡pH为80,当外环境pH低于或高于该值时,鱼鳃生理作用可以起到缓冲作用,造成鳃部微环境于外环境之间高达04个pH单位的差别.CO2含量也表现出相似的变化规律.在碱性条件下,鱼鳃微环境出水对吸附态铜的洗脱效应显著高于pH值相对较高的外环境水.

关键词: 鱼, 鳃部微环境, 铜, 解吸

Abstract: pHand CO2 content differences between fish(Cyprinus carpio) gills micro-environment and the ambient environment were investigated using the technique developed by Playle.The effect of the pHchange on elutriation of copper sorbed on gibbsite was also studied in view of possible desorption of the metal within the gill micro-environment.It was found that there was no pHdifference around pH8.0 and 0.2~0.4 unit difference was observed between the gills' inspired and the expired water when the ambient pHvaried from 8 up to 9.5 or from 8 down to 7.0.Similar trend was detected for CO2.More Cu adsorbed on the gibbsite can be removed by the acidified expired water from the fish gill micro-environment,comparing to the inspired water.

Key words: Fish, Gills micro-environment, Copper, Elutriation

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