活化过硫酸钠/多壁碳纳米管降解氯苯的研究  

Degradation of Chlorobenzene in Aqueous by Sodium Persulfate Activated by Ferrous Ion and Multi-walled Carbon Nanotubes

作　　者：马继飞[1] 姚剑[1] 侯惠奇[1] 陈堃[1] 李玉兰[1] 

机构地区：[1]中国科学院上海应用物理研究所核安全与工程技术部,上海201800

出　　处：《环境科学与技术》2016年第7期118-121,共4页Environmental Science & Technology

基　　金：国家自然科学基金项目资助(11275251)

摘　　要：文章通过制备稳定悬浮的多壁碳纳米管(MWCNTs),以氯苯为处理对象,研究了亚铁离子活化过硫酸盐(Fe2+-SP)和MWCNTs的组合降解实验。考察了反应时间、p H值、MWCNTs浓度和重复使用次数等因素对降解氯苯的影响。实验结果表面,在初始pH值为7,硫酸亚铁浓度为5 mmol/L,过硫酸钠浓度为10 mmol/L,MWCNTs为10 mg/L,反应时间为60 min的条件下,对浓度为40 mg/L的氯苯去除率可到93%,比单独使用Fe2+-SP高11%。溶液p H能影响降解效果,初始p H为7的条件下,处理效果较好。进一步实验表明,MWCNTs具有良好的重复使用能力。Multi-walled carbon nanotubes（MWCNTs）were purified and dispersed in aqueous solution. Advanced oxidation processes with Fe^2＋/Na2S2O8 and MWCNTs were applied to treat chlorobenzene in aqueous. The effect of reaction time,p H value,MWCNTs dosage and usage frequency on the degradation efficiency were systematically investigated. Result showed that the chlorobenzene degradation efficiency of Fe^2＋-SP/MWCNTs system was 11% higher than that of the system with only Fe^2＋-SP,when the chlorobenzene concentration was 40 mg/L within 60 min under the conditions of Fe^2 ＋ concentration 5mmol/L,Na2S2O8 concentration 10 mmol/L,MWCNTs dosage 10 mg/L,and initial solution p H 7. The optimum treatment efficiency was achieved after 60 minutes when p H reaches 7. Moreover,MWCNTs was demonstrated to have good reusability.

关 键 词：硫酸根自由基 过硫酸钠 亚铁离子 多壁碳纳米管 氯苯 

分 类 号：X703.1[环境科学与工程—环境工程]