碱液循环强化电动力学修复氟污染土壤  

Alkaline electrolyte circulation enhanced electrokinetic remediation of fluorine-contaminated Soils

作　　者：朱书法[1] 杜锦屏[1] 索美玉[1] 闫春丽[1] 

机构地区：[1]河南科技大学化工学院环境工程系,河南洛阳471003

出　　处：《生态环境学报》2009年第5期1767-1771,共5页Ecology and Environmental Sciences

基　　金：河南科技大学引进人才专项科研基金(06-12)

摘　　要：1V·cm-1电解电压下,利用去离子水及NaOH溶液做电解液,研究了电解液不同循环方式下土壤氟在电动力学作用下的迁移特征,分析了利用碱液循环强化电动力学技术修复氟污染土壤的可行性。结果表明,以去离子水为电解液单独循环时,土壤氟的去除率为20.3%,而以NaOH溶液为电解液时去除率最高可达57.3%,碱性电解液可提高土壤氟的去除率,且随着碱性的增强土壤氟的去除率逐渐升高。电解液的不同循环方式也对土壤氟的去除产生显著影响,两极溶液串联循环时土壤氟的去除率明显升高。可以采用碱液循环强化电动力学技术修复氟污染土壤。Deionized water and NaOH solution being used as electrolyte with 1 V·cm^-1 voltage gradient,an experimental study was carried out in order to determine the characteristics of migration of soil fluorine in the electrokinetic process under different circulation manner of electrolyte. The feasibility of electrokinetic remediation of fluorine-contaminated soil enhanced by alkaline electrolyte circulation was analyzed. The results show that when deionized water is used as the electrolyte and circulates separately,the removal rate of fluorine is only 20.3%. When NaOH solution is employed as the electrolyte,the removal rate is up to 57.3%. Alkaline electrolyte can effectively promote the removal rate of fluorine in soil and the removal rate increases with the alkalinity of the electrolyte. Different circulation manner of electrolyte has a significant effect on the removal of fluorine in soil. The removal rate of fluorine in soil is markedly increased when catholyte and anolyte circulate in series. Alkaline electrolyte circulation enhanced electrokinetic method can be applied to remediate fluorine-contaminated soils.

关 键 词：氟 电动力学 电迁移 电渗析 

分 类 号：X53[环境科学与工程—环境工程]