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1、第29卷第10期环境科学学报Vo.l29,No.102009年10月ActaScientiaeCircumstantiaeOct.,2009于万禄,熊振湖,马华继.2009.Photo-Fenton法降解水中新型污染物双氯芬酸及降解产物的毒性评价[J].环境科学学报,29(10):2070-2075YuWL,XiongZH,MaHJ.2009.DegradationoftheemergentpollutantDiclofenacinwaterbyphoto-Fentonandtoxicityevaluat
2、ionofitsdegradationproducts[J].ActaScientiaeCircumstantiae,29(10):2070-2075Photo-Fenton法降解水中新型污染物双氯芬酸及降解产物的毒性评价*于万禄,熊振湖,马华继天津城市建设学院,天津300384收稿日期:2008-12-28修回日期:2009-04-20录用日期:2009-07-07摘要:研究了photo-Fenton反应对非甾体抗炎药双氯芬酸的降解和矿化.同时,探讨了HO、Fe2+初始浓度、pH值等因素对photo-F
3、enton反应22的影响,确定了最佳操作条件,并进行了各种氧化法的比较.结果表明,对于UV/HO/Fe2+反应系统下双氯芬酸的降解,其降解速率受到反应22条件的强烈影响.双氯芬酸初始浓度为20mg#L-1时,适宜操作条件是pH值为5,初始FeSO浓度为5mg#L-1,初始HO浓度为200mg#L-1.在422最佳条件下,各种氧化法的降解能力趋势为UV/Fenton>UV/H2O2>Fenton>UV.由于反应中有中间产物的生成,双氯芬酸的矿化过程要长于降解过程,其生物毒性也是随着反应的进行先增大而后减小.
4、关键词:双氯芬酸;photo-Fenton;降解与矿化;生物毒性;EC50文章编号:0253-2468(2009)10-2070-06中图分类号:X703文献标识码:ADegradationoftheemergentpollutantDiclofenacinwaterbyphoto-Fentonandtoxicityevaluationofitsdegradationproducts*YUWanlu,XIONGZhenhu,MAHuajiTianjinInstituteofUrbanConstructio
5、n,Tianjin300384Received28December2008;receivedinrevisedform20April2009;accepted7July2009Abstract:Thecontributionofthephoto-Fentonreactiontothedegradationandmineralizationoftheant-iinflammatorydrug,Diclofenac,wasinvestigatedandthebiologicaltoxicityofitsdeg
6、radationproductswereevaluated.ThestudyincludestheinfluenceoffactorssuchaspHandtheinitialconcentrationofHOandFe2+onthephoto-Fentonreaction;determinationofthebestoperatingconditions;comparisonofdifferentAOPs(advancedoxidation22processes)anddeterminationofth
7、ebiologicaltoxicitiesofthedegradationproductsfromeachprocess.ResultsshowthatthedegradationrateofdiclofenacthroughtheUV/HO/Fe2+reactionsystemisstronglyaffectedbyitsreactionconditions.Whentheinitialconcentrationofdiclofenacis20mg#L-1,the22bestoperatingcondi
8、tionsareatpH5withinitialconcentrationsof5mg#L-1FeSOand200mg#L-1HO.Undertheseoperatingconditions,422degradationabilityofdifferentAOPsisintheorderUV/Fenton>UV/H2O2>Fenton>UV.Becauseoftheappearanceofintermediateproduct
