期刊论文

Experimental study on the combined repair of uranium-contaminated soil by composite electrodynamics with permeable reaction barrier

中文

应用化工

1671-3206

2020

49

2

355-358

10.16581/j.cnki.issn1671-3206.20191111.007

国家自然科学基金资助项目（51174117）； 湖南省高校创新平台开放基金资助项目（15K106）； 湖南创新平台开放基金（17K078）；

本校为第一机构

以铀浓度为80 mg/kg的铀污染土壤作为研究对象,分别采用电动(EK)和电动-可渗透反应墙(EK-PRB)联合修复技术对铀污染土壤进行了修复对比试验,并重点考察了电流强度、pH、铀残余量和去除率等因素的变化,以及分别对两种方法修复效果的影响。结果表明,在初始pH为4.35,电压梯度1 V/cm的条件下,铀离子随着电渗流往阴极迁移效果明显。经过168 h的修复后,EK-PRB修复技术对铀的去除率最大,要比EK修复技术提高46.5%。研究表明,EK-PRB联合修复技术比单独EK修复技术有明显的优势,在修复铀污染土壤方面具有良好的发展应用前景。

80 mg/kg Uranium contaminated soil was taken as the research object,acomparative experiment on remediation of uranium-contaminated soil was carried out by combined electrokinetic (EK)and electro-permeable reactive wall (EK-PRB)remediation technologies,respectively. By comparing current intensity,pH,residual uranium and removal rate,the remediation effect of EK and EK-PRB on uranium contaminated soil was investigated. The results show that uranium ions migrate to cathode with electroosmosis flow at initial pH 4.35 and voltage gradient 1 V/cm. The removal rate of uranium by EK-PRB technology is ...