典型地质背景区土壤重金属污染生态防治技术研究

Ecological Prevention and Control Techniques for Heavy Metal Pollution in Soil of Typical Geological Background Areas

选取某典型地质背景作为研究区域,通过合理布置采样点采集土壤样品,测定土壤中各重金属元素含量,结合研究区的地质条件与实际概况,分析土壤重金属污染物的浓度特征与垂向剖面土壤团聚体重金属分布特征,基于此,针对土壤重金属的污染特征制备土壤污染修复淋洗剂,并进行了污染生态防治实验,通过比较低、中、高三种浓度下不同类型淋洗剂对Mn、Pb和Zn的去除效果可知,对于土壤中Mn、Pb和Zn具有较好去除效果的淋洗剂类型及浓度分别为中浓度的EDTA、高浓度乙酸和高浓度的草酸。

A typical geological background is selected as the research area with soil samples collected through reasonable arrangement of sampling points.The contents of various heavy metal elements in the soil are determined to analyze the distribution characteristics of heavy metal concentration and pollution characteristics in different particle sizes.Based on this,the soil heavy metal pollution prevention and control improvers are prepared to conduct pollution ecological prevention and control experiments.By comparing the effects of three concentrations of leaching agents on Mn,Pb,and Zn at low,medium,and high concentrations,it was found that the types and concentrations of leaching agents with good removal effects on Mn,Pb,and Zn in soil were EDTA at medium concentrations,acetic acid at high concentrations,and oxalic acid at high concentrations,respectively.