土壤中Cd的淋滤动力学分析

为了解Cd在不同pH淋滤条件下释放特征以及淋滤动力学原理,选取受重金属污染的T1、T2两土壤,分别进行pH为3、5、7、9的淋滤动力学实验,分析试验前后重金属含量及形态的变化,并根据淋滤量进行动力学拟合分析,可以看出在酸性条件下淋滤量较高,不同pH的淋滤结果适用于不同的方程拟合。

In order to understand the release characteristics of Cd under different pH leaching conditions and the principle of leaching kinetics,T1 and T2 soils polluted by heavy metals were selected to carry out leaching kinetics experiments with pH of 3,5,7 and 9 respectively.The changes of heavy metal content and form before and after the experiment were analyzed,and the kinetic fitting analysis was carried out according to the leaching amount.The leaching results of different pH are suitable for different equation fitting.