【摘要】 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.更多还原

【Abstract】 The partitioning characteristics of copper to organic carbon in the river and nearshore sediment of Hong Kong were studied. The anoxic sequential batch titration (ASBT) technique was used to determine the binding capacity of sediments for copper . Having regard to the binding of copper to the acid volatile sulfide substances in the sediments, it was found that the Langmuir isotherm could be fitted to adsorption of copper to sediment organic carbon at pH 6 and 7. The partition coefficient Kd,oc was also calculated for each sample. It was also found that both sorption capacity and partition coefficient increase with increasing pH.更多还原