柠檬酸钠-Fe^2+催化纳米过氧化钙修复污染地下水  

Remediation of Contaminated Groundwater Using Nano-sized Calcium Peroxide Catalyzed by Sodium Citrate-Fe^2+

作　　者：刘玉仙 张克刚 丁冠涛 王晓东[2] 彭圣洁 LIU Yuxian;ZHANG Kegang;DING Guantao;WANG Xiaodong;PENG Shengjie(No.801 Hydrogeological and Engineering Exploration Brigade of Shandong Provincial Bureau of Geology and Mineral Resources(Shandong Provincial Geo-mineral Engineering Exploration Institute),Jinan 250014,Shandong,China;School of Civil Engineering and Architecture,University of Jinan,Jinan 250022,Shandong,China)

机构地区：[1]山东省地质矿产勘查开发局八〇一水文地质工程地质大队(山东省地矿工程勘察院),山东济南250014 [2]济南大学土木建筑学院,山东济南250022

出　　处：《济南大学学报（自然科学版）》2020年第5期510-515,共6页Journal of University of Jinan(Science and Technology)

基　　金：国家自然科学基金项目(21777056)。

摘　　要：为了修复被三氯乙烯污染的地下水,利用化学沉淀法制备纳米过氧化钙,采用柠檬酸钠强化Fe^2+催化效果,考察柠檬酸钠与Fe^2+的配比,以及纳米过氧化钙、柠檬酸钠-Fe^2+投加量等对修复效果的影响,并分析三氯乙烯的降解路径。结果表明:在中性条件下,柠檬酸钠-Fe^2+可以有效催化纳米过氧化钙降解地下水中的三氯乙烯;体系中纳米过氧化钙、柠檬酸钠-Fe^2+的浓度以及柠檬酸钠与Fe^2+的配比对三氯乙烯的降解有显著影响,降解反应符合伪一级动力学模型;在三氯乙烯浓度为0.16 mmol/L,柠檬酸钠与Fe^2+的物质的量比为1∶1,体系中纳米过氧化钙、柠檬酸钠-Fe^2+的浓度分别为2.88、0.96 mmol/L时,反应3 h后三氯乙烯去除率可达98.0%。To remedy the groundwater contaminated by trichloroethylene,nano-sized calcium peroxide was prepared by chemical precipitation method,and sodium citrate was used to enhance the catalytic effect of Fe^2+.The effect of the proportion of sodium citrate and Fe^2+,as well as the concentrations of nano-sized calcium peroxide and sodium citrate-Fe^2+on the remediation,was investigated,and the degradation path of trichloroethylene was analyzed.The results show that sodium citrate-Fe^2+can effectively catalyze the degradation of trichloroethylene in groundwater by nano-sized calcium peroxide under neutral condition.The concentration of nano-sized calcium peroxide and sodium citrate-Fe^2+as well as the proportion of sodium citrate and Fe 2+have significant impact on the degradation of trichloroethylene,and the degradation reaction accords with the pseudo first-order kinetic model.When the concentration of trichloroethylene is 0.16 mmol/L,the amount of substance ratio of sodium citrate to Fe^2+is 1∶1,and the concentrations of nano-sized calcium peroxide and sodium citrate-Fe^2+are 2.88 mmol/L and 0.96 mmol/L respectively,the removal rate of trichloroethylene can reach 98.0%with the reaction time of more than 3 h.

关 键 词：地下水修复 纳米过氧化钙 柠檬酸钠 三氯乙烯 

分 类 号：X523[环境科学与工程—环境工程]