摘要
针对苯胺污染地下水的异位修复问题,采用Fenton及臭氧氧化法进行处理,以TOC和苯胺的去除率为指标,分别对其工艺参数进行了优化,并对比分析了降解途径、去除效率和经济成本。结果表明,Fenton氧化去除苯胺的最佳工艺条件:当初始pH值为3.0、H2O2投加量为300 mmol/L、Fe2+和H2O2的摩尔比为1∶3时,苯胺的去除率可以达到91.07%;臭氧氧化法的最佳工艺条件:当初始pH值为9、曝气速率为1 L/min、臭氧的投加量为360 mg/L、进气中臭氧的浓度为60 mg/L时,苯胺的去除率可以达到99.15%。成本核算表明,臭氧比Fenton反应具有更好的经济效益。降解途径分析表明,Fenton反应及碱性条件下臭氧反应过程中,硝基苯为苯胺氧化过程中的主要中间产物。
Aniline-contaminated groundwater was treated by Fenton and ozone oxidation.Removal parameters of TOC and aniline were optimized.Degradation pathways,removal efficiency and economic cost were also discussed.Results showed that removal rate of aniline could reach 91.07%when optimum conditions with Fenton oxidation were initial pH value of 3.0,H2O2 dosage of 300 mmol/L,Fe2+and H2O2 molar ratio of 1:3.In addition,removal rate of aniline could reach 99.15%when optimum conditions with ozone oxidation were initial pH value of 9,aeration rate of 1 L/min,ozone dosage of 360 mg/L,and ozone concentration of 60 mg/L.Cost accounting showed that ozone had better economic benefits than Fenton.Degradation pathway analysis showed that nitrobenzene was the main intermediate in the oxidation of aniline during Fenton reaction and ozone reaction under alkaline conditions.
作者
宋立杰
SONG Lijie(Shanghai Institute for Design&Research in Environmental Engineering Co.,Ltd.,Shanghai 200232,China)
出处
《净水技术》
CAS
2020年第8期102-108,共7页
Water Purification Technology
基金
上海市科委资助项目(18DZ2283800)。
