过硫酸盐活化技术处理地下水中的BTEX及其动力学  

Treatment of BTEX in groundwater by persulfate oxidation reaction and its kinetics

作　　者：孙威[1,2] 赵勇胜[1] 杨玲[1] 马百文[1] 

机构地区：[1]吉林大学环境与资源学院,长春130026 [2]吉林师范大学大学环境工程学院,四平136000

出　　处：《安徽农业大学学报》2012年第3期446-450,共5页Journal of Anhui Agricultural University

基　　金：国家高技术研究发展计划("863"计划)重大项目(2008AA06A410);吉林大学"985工程"研究生创新基金项目(20080113)共同资助

摘　　要：利用模拟苯、甲苯、乙苯和二甲苯(BTEX)污染的地下水,研究过硫酸盐(Na2S2O8)活化氧化处理BTEX污染。结果表明,过硫酸盐对BTEX污染的地下水具有很好的处理能力。当Na2S2O8/BTEX(摩尔比)=20,Na2S2O8/Fe2+(摩尔比)=8的时候,BTEX的处理效果最好,甲苯、乙苯和二甲苯去除率均能达到80%以上;而苯的去除率稍低。整个试验过程中体系均处于强氧化环境,pH值降至3以下。过硫酸盐对苯、甲苯、乙苯和二甲苯(BTEX)的去除过程均符合二级反应动力学:1/ct=kt+1/c0。We studied the effects of BTEX by persulfate （Na2S2O8） oxidation treatment on simulated con- taminated groundwater of benzene, toluene, ethylbenzene and xylene （ BTEX ）.The experimental results indicated that the persulfate has good processing ability on groundwater of BTEX pollution .When Na2S2O8 / BTEX in mo- lar ratio of 20, and Na2S2O8 / Fe^2＋ in molar ratio of 8, the experimental result was the best. The removal rates of toluene, ethylbenzene and xylene reached 80%, except for benzene. The oxidative processes were fitted for second order reaction kinetics： 1/Cl=kt＋1/C0. The experimental system was in strong oxidizing environment and the results ofpH were at the initial state.

关 键 词：过硫酸盐 活化处理 BTEX 动力学 

分 类 号：X523[环境科学与工程—环境工程]