焦化废水Fenton氧化预处理过程中主要有机污染物的去除_谢成

第27卷第7期2007年7月环境科学学报ActaScientiaeCircumstantiaeVol.27,No.7Jul.,2007基金项目:国家自然科学基金资助项目(No.50278036)SupportedbytheNationalNaturalScienceFoundationofChina(No.50278036)作者简介:谢成(1982—),男,硕士研究生;＊通讯作者(责任作者),E-mail:cechwei@scut.edu.cnBiography:XIECheng(1982—),male;＊Correspondingauthor,E-mail:cechwei@scut.edu.cn谢成,晏波,韦朝海,等.2007.焦化废水Fenton氧化预处理过程中主要有机污染物的去除[J].环境科学学报,27(7):1101-1106XieC,YanB,WeiCH,etal.2007.RemovalofmajororganicpollutantsincokingwastewaterbyFentonoxidationpre-treatment[J].ActaScientiaeCircumstantiae,27(7):1101-1106焦化废水Fenton氧化预处理过程中主要有机污染物的去除谢成1,晏波1,韦朝海1,＊,吴超飞1,任源1,刘显清21.华南理工大学环境科学与工程学院,广州5106402.广东韶关钢铁集团有限公司焦化厂,韶关512123收稿日期:2006-10-31录用日期:2007-05-17摘要:以焦化废水原水为研究对象,采用Fenton氧化法进行预处理,在考察H2O2用量与反应时间对焦化废水中CODCr、挥发酚去除率影响的基础上,重点分析反应体系中有毒难降解有机物浓度的变化.通过GC-MS分析发现,在反应温度为30℃、H2O2用量为1/2理论量、n(Fe2+)∶n(H2O2)=1∶20的条件下,酚、苯系物、石油烃、含氮杂环有机物和多环芳烃在反应10min时相应的去除率分别达到93.7%、96.2%、92.1%、92.7%和89.2%,此时挥发酚类物质去除率为98.6%,COD去除率为54.4%.结果表明,焦化废水经Fenton氧化预处理不仅能取得较高的CODCr、挥发酚类物质去除率,而且能将其中有毒难降解有机污染物氧化为较易生物降解的醇、醛、酮及有机酸等中间产物,有利于后续生物处理过程.关键词:焦化废水;Fenton氧化;酚;含氮杂环化合物;GC-MS文章编号:0253-2468(2007)07-1101-06中图分类号:X703文献标识码:ARemovalofmajororganicpollutantsincokingwastewaterbyFentonoxidationpre-treatmentXIECheng1,YANBo1,WEIChaohai1,＊,WUChaofei1,RENYuan1,LIUXianqing21.CollegeofEnvironmentalScienceandEngineering,SouthChinaUniversityofTechnology,Guangzhou5106402.CokePlantofShaoguanIron＆SteelGroupCo.LTD,Shaoguan512123Received31October2006;accepted17May2007Abstract:TheeffectsofH2O2dosageandreactiontimeonremovalofCODvolatilephenols,andespeciallytoxicandrefractoryorganicsfromcokingwastewaterbyFentonoxidationwerestudied.AccordingtoGC-MSresults,93.7%ofhydroxybenzene,96.2%ofbenzenehomologues,92.1%ofpetroleumhydrocarbons,92.7%ofnitrogenheterocycliccompoundsand89.2%ofPAHswereremovedin10minat30℃wheninitialconcentrationofH2O2addedwashalfofstoichiometriccalculatedquantitiesandFe2+/H2O2moleratiowas1∶20.Undertheseconditions,54.4%ofCODand98.6%ofvolatilephenolwerealsoremoved.Thetoxicandrefractoryorganicsweredecomposedintosimpler