单一及复合环境友好型淋洗剂修复铅污染土壤

doi:10.12068/j.issn.1005-3026.2022.01.015

东北大学学报（自然科学版） ›› 2022, Vol. 43 ›› Issue (1): 103-110.DOI: 10.12068/j.issn.1005-3026.2022.01.015

单一及复合环境友好型淋洗剂修复铅污染土壤

李英华，吴纪国，钱杰，孙嘉茹

)(东北大学资源与土木工程学院，辽宁沈阳110819)

修回日期:2021-03-05 接受日期:2021-03-05 发布日期:2022-01-25
通讯作者: 李英华
作者简介:李英华(1979-)，女，辽宁灯塔人，东北大学教授，博士生导师.
基金资助:
国家重点研发计划项目(2019YFC180380202).

Remediation of Lead-Contaminated Soil by Single and Compound Environment-Friendly Leaching Agents

LI Ying-hua， WU Ji-guo， QIAN Jie， SUN Jia-ru

School of Resources & Civil Engineering， Northeastern University， Shenyang 110819， China.

Revised:2021-03-05 Accepted:2021-03-05 Published:2022-01-25
Contact: LI Ying-hua
About author:-
Supported by:
-

摘要/Abstract

摘要： 为了探索一种针对重金属铅(Pb)的高效环境友好型淋洗剂，采用水平实验法探究了乙二胺四亚甲基膦酸(EDTMPA)、聚酰胺酸(PAA)、鼠李糖脂三种淋洗剂对Pb污染土壤的淋洗特征，使用响应面法对EDTMPA和PAA进行了淋洗参数优化.首次将这两种螯合剂EDTMPA，PAA与表面活性剂鼠李糖脂复合淋洗.结果表明，单独淋洗时，EDTMPA的效果最佳，最佳淋洗参数为质量分数2.3%，pH 5.7，淋洗时间167min，对Pb的去除率为57.6% .鼠李糖脂复合EDTMPA对Pb的最大去除率为70.9%，比EDTMPA单独淋洗提高了12%;鼠李糖脂复合PAA的最大去除率为63.3%，比PAA单独淋洗提高了16%.鼠李糖脂复合EDTMPA是一种高效且环境友好型淋洗剂.

关键词: 土壤淋洗技术;响应面;重金属;复合淋洗;铅

Abstract: The leaching characteristics of ethylenediamine tetra methylene phosphonic acid(EDTMPA)， polyamic acid(PAA) and rhamnolipid on removing Pb from contaminated soil were studied to develop a high-efficiency and environment-friendly leaching agent for Pb contaminated soil by horizontal experiments， and response surface methodology(RSM)was applied to optimize the parameters of these two eluents. For the first time， combinations of the biosurfactant rhamnolipid and two chelating agents EDTMPA and PAA were used to leach contaminated soil of Pb. The results showed that EDTMPA has the best leaching effect among these three eluents， and the optimal operation parameters were concentration 2.3%， pH 5.7， leaching time 167min and the removal rate of Pb can reach 57.6%. The highest removal rate of rhamnolipid combined with EDTMPA was 70.9%， which was 12% higher than that of EDTMPA alone. The highest removal rate of rhamnolipid compound PAA was 63.3%， which was 16% higher than that of PAA alone. Rhamnolipid combined with EDTMPA is an environment-friendly eluent with the highest removal rate.

Key words: leaching technology of soil; response surface; heavy metal; complex leaching; Pb

中图分类号:

李英华，吴纪国，钱杰，孙嘉茹. 单一及复合环境友好型淋洗剂修复铅污染土壤[J]. 东北大学学报（自然科学版）, 2022, 43(1): 103-110.

LI Ying-hua， WU Ji-guo， QIAN Jie， SUN Jia-ru. Remediation of Lead-Contaminated Soil by Single and Compound Environment-Friendly Leaching Agents[J]. Journal of Northeastern University(Natural Science), 2022, 43(1): 103-110.

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单一及复合环境友好型淋洗剂修复铅污染土壤

Remediation of Lead-Contaminated Soil by Single and Compound Environment-Friendly Leaching Agents

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