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研究论文

STUDY ON THE EFFECTS OF CONCENTRATIONS OF HEAVY METALS IN SEDIMENT AND INITALLY IN WATER PHASE ON THEIR ADSORPTION

摘要：从吸附动力学方程和质量守恒方程出发,导得静态试验中,重金属离子的泥沙吸附量和水相浓度随时间变化的计算公式,进而导出重金属离子的泥沙平衡吸附量和水相平衡浓度随泥沙吸附特性、水相初始浓度(泥沙初始吸附量)和泥沙浓度变化的计算公式。试验结果表明,泥沙浓度不影响吸附特性参数如饱和吸附量b,解吸与吸附速率系数之比k及吸附速率系数k₁,而水相初始浓度对k₁有较大影响;对平衡吸附量而言,泥沙浓度和水相初始浓度均有较大影响,并可从质量守

Abstract：Adsorption of heavy metals on sediment and the concentration of heavy metals in waterphase both as a function of time in static experiments were derived from the basic equationsof adsorption dynamics and mass balance. The results show that the concentrations of heavymetals in sediment had no effect on the behavior of sediment adsorbing heavy metals,in-cluding saturated adsorption,coefficient of adsorption rate,and desorption rate,The initialconcentration of heavy metals on water phase could much more significantly influence the co-efficients of adsorption rate desorption rate. It was also found thta the concentration ofheavy metal in sediment and the initial concentration of heavy metals in water phase had ef-fects on their equilibrated adsorption on sediment and their equilibrium concentration in wa-ter phase,and this could be explatined by mass balance.