期刊论文

Research on the remediation of uranium-contaminated soil by composite electrolyte enhancement and improvement device

中文

中国环境科学

1000-6923

2023

43

08

4127-4136

10.3969/j.issn.1000-6923.2023.08.029

国家自然科学基金资助项目(42177074)； 湖南省教育厅科学研究项目(21C0273)；

本校为第一机构

通过对照实验、单因素实验及正交实验对铀污染土壤进行了电动优化修复研究.结果表明:0.20mol/L酒石酸与0.05mol/L氯化铁复合电解液应用于改良装置修复后铀去除率提升至55.73%,铀平均浸出毒性浓度仅为0.07mol/L,且能量利用率增大至306.21.Visual MINTEQ软件模拟结果表明铀主要以带正电铀酰离子(UO22+)及少量中性铀-酒石酸络合物形式存在,因此,由于电迁移及正向电渗析的协同作用,铀的迁移方向为阳极到阴极.最后通过正交实验得出本实验最佳去除率的实验参数为0.15mol/L酒石酸和0.08mol/L氯化铁及1.5V/cm电压梯度.改良装置可通过提高土壤导电性、zeta电位、降低土壤pH值以提高修复效率,且酒石酸与氯...

Controlled experiment,single factor experiment and orthogonal experiment were used to study the electrokinetic optimization of uranium contaminated soil.The uranium removal efficiency increased to 55.73%,with an average leaching toxic concentration of uranium of only 0....MORE Controlled experiment,single factor experiment and orthogonal experiment were used to study the electrokinetic optimization of uranium contaminated soil.The uranium removal efficiency increased to 55.73%,with an average leaching toxic concentration of uranium of only 0.07mol/L.After applying a composite electrolyte of 0....