淋洗法去除土壤中铬污染的研究  

Leaching method to explore the removal of chromium in soil

作　　者：苗昱霖[1] 张美秀[1] 张振斌[1] 丛唯一[1] 焦昕倩[1] 

机构地区：[1]吉林大学环境与资源学院,吉林长春130012

出　　处：《东北师大学报（自然科学版）》2012年第2期114-117,共4页Journal of Northeast Normal University(Natural Science Edition)

基　　金：科技部科技重大专项-004基金资助项目(2012ZX07202009)

摘　　要：以东北地区某六价铬堆放场地表土壤为实验目标,利用不同酸度溶液淋洗土壤样品,以去除样品中高浓度的铬元素.实验探究了淋洗液pH值、淋洗时间、土壤颗粒大小对去除效率的影响.得出最佳反应条件:当pH为13,连续淋洗超过15d,可明显去除土壤中高浓度的铬元素,其最终铬含量为102mg/kg,去除效率达到87.12%,符合国标(GB15618-1995)中二类土壤的相关标准.该方法与传统去除土壤中的铬的方法相比,具有操作简单、耗时少、消耗能源量低和节约成本等优点.Choose Make leaching e different acidity the surface soil xperiments on SO the the eluent pH in the soil was 102 near the dump of hexavalent chromium as the the soil to remove the high concentrations of experimental target . chromium in it with lutions. Experiments show that： The removal efficiency has important links with value,leaching time,soil particle size and other factors. The Cr （VI） concentration mg/kg,this meet the national standard （GB15618-1995） of the type II soil,and the removal efficiency was 87. 12%, when the experimental conditions were as follows： pH for 13, continuous injector more than 15 days. Compared with traditional methods of remove the chromium in soil, this method has the advantage of easy to operate, less time-consuming, low energy consumption, cost,etc. To some extent,it is the improvement of traditional methods.

关 键 词：铬 淋洗 土壤 粒径 

分 类 号：X53[环境科学与工程—环境工程]