鲤鱼鳃部微环境的pH特征及其对吸附态铜的解吸影响  

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

作　　者：龙爱民[1] 陶澍[1] 刘长发[1] 

机构地区：[1]北京大学城市与环境学系,北京100871

出　　处：《应用生态学报》2002年第1期118-120,共3页Chinese Journal of Applied Ecology

基　　金：国家杰出青年基金资助项目 ( 4 95 2 5 10 2 )

摘　　要：研究了不同pH条件下鲤鱼 (Cyprinuscarpio)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 8 0 ,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 0 4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 .pH and CO-2 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 pH change 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 pH difference around pH 8^0 and 0^2～0^4 unit difference was observed between the gills' inspired and the expired water when the ambient pH varied from 8 up to 9^5 or from 8 down to 7^0.Similar trend was detected for CO-2.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.

关 键 词：鳃部微环境 铜 解吸 重金属 吸附态 鲤鱼 

分 类 号：X174[环境科学与工程—环境科学]