黄河水中pH值对镉与沉积物相互作用的影响

摘要

对黄河中游清水河县喇嘛湾断面水体沉积物的吸附特性进行研究，测定了不同浓度沉积物样品对Cd(Ⅱ)的pH吸附突跃曲线.实验结果表明，颗粒物对金属离子的吸附随水溶液pH值的增高而增强；在同一吸附剂浓度下，吸附质浓度增高，使吸附突跃区间向高pH值方向移动.%In this paper,we have studied the adsorption characteristics of the Yellow River water,which is from La Mawan,Qin Shuihe county,middle reaches of the Yellow River.pH adsorption curve of the heavy metal Cd(Ⅱ) were measured.The results show that the adsorption of the sediment on heavy metals Cd(Ⅱ) rises as the value of pH rises.In the same concentration of adsorbent,the leaping range of adsorption will move to high value of pH as the concentration of adsorbate rises.