不同修复剂对Cd污染土壤的修复效果研究

Study on the Remediation Effect of Different Remediation Agents on Cd Contaminated Soil

针对Cd污染土壤,本文对比分析海泡石、沸石和凹凸棒石三种修复剂的修复效果。试验结果显示,3种修复剂均能有效降低Cd含量,根据修复效果,排序为海泡石>凹凸棒石>沸石,海泡石表现最佳,平均降低率达46.98%。研究发现,随着修复剂加入量的增加,修复效果逐渐提高,土壤初始镉含量越高,修复效果越明显。此外,所有修复剂均能提高土壤pH,减少镉的生物有效性。本研究为Cd污染土壤修复提供新方法。

Faced with Cd contaminated soil,this paper compares and analyzes the remediation effects of three remediation agents,namely sepiolite,zeolite,and attapulgite.The experimental results show that all three restorations are effective in reducing Cd content,according to the restoration effect,the order is sepiolite>attapulgite>zeolite,with sepiolite showing the best performance,with an average reduction rate of 46.98%.Research has found that as the amount of remediation agent added increases,the remediation effect gradually improves,and the higher the initial cadmium content in the soil,the more significant the remediation effect.In addition,all remediation agents can increase soil pH and reduce the bioavailability of cadmium.This study provides a new method for the remediation of Cd contaminated soil.