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采用厌氧序列分批滴定装置(ASBT)研究了香港青山湾避风塘和屯门河、城门河、林村河感潮河段沉积物中有机碳对铜的吸附特性.结果表明,在pH6和pH7的条件下,沉积物中有机碳对铜的吸附特性可用Langmuir等温式描述.铜在不同河流沉积物有机碳中的分配系数差别较大,吸附容量差别较小.H~+可以结合沉积物有机碳的重金属结合位点,导致吸附容量和分配系数随pH增大而增大.
The adsorption characteristics of organic carbon in sediments of Qingshanwan Typhoon Shelter and Tuen Mun River, Shing Mun River and Lincun River tidal reach in Hong Kong were studied by using anaerobic sequencing batch titration (ASBT). The results showed that at pH 6 and pH 7 , The adsorption characteristics of organic carbon to copper in sediments can be described by Langmuir isotherm.The distribution coefficients of copper in organic carbon in different river sediments are quite different and the difference in adsorption capacity is small.H ~ + can be used in combination with sediment organic Carbon heavy metal binding sites, resulting in adsorption capacity and partition coefficient increases with increasing pH.