摘要
该文比较研究了零价铁和亚铁盐2类铁基修复材料对过硫酸盐(PS)处理实际五氯酚(PCP)污染土壤的促进作用。研究结果表明,2种铁材料均能促进过硫酸盐氧化降解PCP,Fe/PS体系中PCP的降解效果整体优于Fe~0/PS体系。PCP的降解速率表现出先快后慢的趋势,提高PS浓度可促进两体系中PCP的降解。随着液固比和铁活化剂用量的增加,体系中PCP的降解效果均呈现出先增强后减弱的趋势。土壤有机质会大量消耗氧化剂,影响污染物的降解。在未来研究及实际应用中,需充分考虑土壤中有机质的消耗,进行氧化剂添加量的评估。研究结果可为实际五氯酚污染场地的修复处理提供理论指导。
The effectiveness of application of two iron activators,i.e.zero-valent iron and ferrous salts to improving treatment and remediation of PCP (pentachlorophenol)-contaminated soil by PS (persulfate) was comparatively studied.As a result,it was showed that both of the iron materials could promote the activation of persulfate and the oxidative degradation of PCP,and PCP degradation effect in the Fe/PS system was better than that in the Fe~0/PS system.As a whole,the rate of PCP degradation tended being fast firstly,then turning slower.For both of two systems,increasing the concentration of PS could promote PCP degradation efficiency,and with the increases of the liquid-solid ratio and the amount of two iron activators,the effectiveness of PCP degradation enhanced in initial stage and then diminished.It was also found that the soil organic matter (SOM) would affect the degradation of targeted pollutants,so in future case study and practical application of this new technology,when estimating the appropriate dose of these iron activators applied to soil should take consideration of consumption of SOM.This study could provide a reference and theoretical guidance for the treatment and remediation of PCP-contaminated sites in practice.
作者
赵颖
刘萍
徐文杰
齐文豪
方园园
欧阳照锋
陈静
王琳玲
ZHAO Ying;LIU Ping;XU Wenjie;QI Wenhao;FANG Yuanyuan;OUYANG Zhaofeng;CHEN Jing;WANG Linling(China City Environment Protection Engineering Lid.Company,Wuhan 430074,China;School of Eviromental Scince and Enginring Huazhong University of Science and Techology,Wuhan 430074 China;Hunan Engineering Research Center for Resource Recovery and Safe Disposal of Industrial Solid Waste,Changsha 410032,China)
出处
《环境科学与技术》
CAS
CSCD
北大核心
2022年第5期193-197,共5页
Environmental Science & Technology
基金
华中科技大学学术前沿青年团队支持计划项目(2018QYTD05)。
关键词
过硫酸钠
五氯酚
土壤修复
铁活化
persulfate
pentachlorophenol
soil remediation
iron activation
