摘要
通过过硫酸钠体系和芬顿体系对国内某污染场地实际污染地下水(1,2-二氯乙烷浓度21.6 mg/L;1,2-二氯丙烷浓度14.22 mg/L;氯仿浓度1.2 mg/L;TPH浓度9.49 mg/L)中氯代烷烃与石油烃的去除修复,研究了2种高级氧化体系不同药剂配比对污染物的去除效果。结果表明:过硫酸钠体系下,可将1,2-二氯乙烷浓度降低到1.31~1.75 mg/L;1,2-二氯丙烷浓度降低到1.39~2.67 mg/L;氯仿浓度降低到0.18~0.46 mg/L;TPH浓度去除到0.30~1.35 mg/L。芬顿体系下,可分别将以上4类污染物浓度分别降低到0.068~0.29、0.008~0.16、ND(未检出)和0.27~0.68 mg/L。过硫酸钠体系对VOCs和TPH的降解率可分别达到61.8%和85.7%以上;芬顿体系对VOCs和TPH的降解率可分别达到98.6%和92.8%以上。以上结果说明,两种体系均有较高的修复效率,但以芬顿体系效率更高。
In this work,polluted groundwater from a polluted site(1,2-dichloroethane=21.6 mg/L;1,2-dichloropropane=14.22 mg/L;chloroform=1.2 mg/L;TPH=9.49 mg/L)was remediated with two advanced oxidation methods,i.e.,sodium persulfate system and Fenton system.The dissipation of these organic pollutants in the groundwater was conducted at different operating conditions,especially the reagent ratios of the two advanced oxidation systems.The results showed that under the sodium persulfate system,the concentration of 1,2-dichloroethane was reduced to 1.31~1.75 mg/L;the concentration of 1,2-dichloropropane was reduced to 1.39~2.67 mg/L;that of chloroform was reduced to 0.18~0.46 mg/L;and that of TPH was reduced to 0.30~1.35 mg/L.While with the Fenton system,the concentrations of these four pollutants were reduced to 0.068~0.29,0.008~0.16,ND(not detected)and 0.27~0.68 mg/L,respectively.The above results showed that the dissipation rates of VOCs and TPH can reach 61.8%and 85.7%,respectively in the sodium persulfate system,while 98.6%and 92.8%in the Fenton system.The results of the present work indicated that both systems were effective in remediating of VOCs and TPH contaminated groundwater,with the Fenton system being more robust.
作者
毛凯
魏少明
李立平
Mao Kai;Wei Shaoming;Li Liping(Zhongke Dingshi Environmental Engineering Co.Ltd,Beijing 100028,China;School of the Environment,Henan University of Technology,Zhengzhou,Henan 450001,China)
出处
《绿色科技》
2023年第6期220-224,共5页
Journal of Green Science and Technology
关键词
高级氧化法
过硫酸钠体系
芬顿体系
异位修复
药剂配比
advanced oxidation method
sodium persulfate system
Fenton system
ex-situ remediation
reagent ratio
