有机酸增强剂对土壤砷污染电动修复效果的影响  

Effect of Organic Acid Enhancers on Electrokinetic Remediation of Soil Arsenic Pollution

作　　者：邓天天[1] 李晗晟 孙雪梅 马超 赵俊伟 DENG Tiantian;LI Hansheng;SUN Xuemei;MA Chao;ZHAO Junwei(School of Environment and Biological Engineering,Henan Institute of Engineering,Zhengzhou 451191,China)

机构地区：[1]河南工程学院环境与生物工程学院,郑州451191

出　　处：《吉林大学学报（理学版）》2022年第4期1007-1014,共8页Journal of Jilin University:Science Edition

基　　金：河南省科技攻关项目(批准号:222102320055);河南省高等学校青年骨干教师培养计划项目(批准号:2020GGJS238);河南省本科高校大学生创新训练计划项目(批准号:S202111517013).

摘　　要：针对土壤砷污染严重,修复难度大等问题,以砷模拟污染土壤为研究对象,选择乙酸、柠檬酸、乙二胺四乙酸(EDTA)三种有机酸为增强剂,研究电动法在不同有机酸作用下对砷污染土壤的修复效果.结果表明:加入有机酸可在一定程度上抑制土壤对砷的吸附;土壤中砷的解吸量与加入柠檬酸和EDTA的浓度呈正比,其解吸能力为柠檬酸>EDTA>乙酸;当修复电压为40 V,修复时间为4 d,采用柠檬酸作为增强剂时,土壤中靠近阴极位置砷的质量浓度降低至初始质量浓度的38.9%.相对于传统电动法,加入有机酸可明显提高砷污染土壤的修复效果.Aiming at the problem that soil arsenic pollution was serious,and it was difficult to repair.Taking soil aresenic pollution as the research object,we selected acetic acid,citric acid and ethylenediamine tetraacetic acid(EDTA)as enhancers to study the remediation effect of electrokinetic method on the arsenic contaminated soil under the action of different organic acids.The results show that the addition of organic acid can inhibit the adsorption of arsenic in the soil to a certain extent.The desorption amount of arsenic in the soil is proportional to the concentration of citric acid and EDTA,and its desorption capacity is citric acid>EDTA>acetic acid.When the repair voltage is 40 V,the repair time is 4 d,and the citric acid is used as an enhancer,the mass concentration of arsenic near the cathode in the soil decreased to 38.9%of the initial mass concentration.Compared with the traditional electrokinetic method,the addition of organic acid can obviously improve the remediation effect of arsenic contaminated soil.

关 键 词：有机酸增强剂 土壤 砷污染 电动法 修复效果 

分 类 号：X52[环境科学与工程—环境工程]