CAJ | 학술논문

1 V·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.
1 V·cm~(-1)전해전압하,이용거리자수급NaOH용액주전해액,연구료전해액불동순배방식하토양불재전동역학작용하적천이특정,분석료이용감액순배강화전동역학기술수복불오염토양적가행성.결과표명,이거리자수위전해액단독순배시,토양불적거제솔위20.3%,이이NaOH용액위전해액시거제솔최고가체57.3%,감성전해액가제고토양불적거제솔,차수착감성적증강토양불적거제솔축점승고.전해액적불동순배방식야대토양불적거제산생현저영향,량겁용액천련순배시토양불적거제솔명현승고.가이채용감액순배강화전동역학기술수복불오염토양.
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 circula-tion 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 rote is up to 57.3%. Alkaline elec-trolyte 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 electroldnetic method can be applied to remediate fluorine-contaminated soils.