UVH2O2光助氧化降解丽华实军蓝制衣染料.pdf

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1、第24卷第9期化学研究与应用V01．24．No．92012年9月ChemicalResearchandApplicationSep．，2012文章编号：1004—1656(2012)09—1439436Photo．oxidativedegradationoflevafixnavyinUV／H2O2systemHUANGXiao。xia，HURu，CAIBang—hong(SchoolofChemistryandEnvironment，JiayingUniversity，Meizhou514015，China)Abstract：Thereactiondete

2、rminingparametersandthereactionkineticsofthephotooxidativedegradationofadyeLevafixNavyintheUV／H202systemhavenbeenstudied．TheUV／H202systemishighlyefficientindegradatingLevafixNavy，i-e．，asmalla．mountofH202candegradehighlyconcentrateddyesolution．Moreover，theUVphoto—decompositionofthe

3、dyemoleculesisfoundtobeconcurrentwiththephoto．oxidativedegradation，bothofwhichareapparentfirst-orderreactions．Theformerreactionhasanaeti-vationenergyof9．71kJ·mol_。withapre—exponentialfactorof1．61min_。，andthelatterhasanactivationenergyof50．3kJ’mol～withapre．exponentialfactorof3．88x1

4、0min～，respectively．ThedyedegradationeficiencypeakswhentheinitialpH0fthedyesolutionisstronglybasic(pH=12)．Keywords：hydrogenperoxide，photo—degradation，LevafixNavy，reactionrateconstant，activationenergyUV／H202光助氧化降解丽华实军蓝制衣染料黄晓霞刘茹蔡邦宏(嘉应学院化学与环境学院，广东梅州514015)摘要：本文对UV／HO：光助氧化降解丽华实军蓝制衣染料的效

5、果及其影响因素和动力学进行了研究。结果表明，UV／H：02对丽华实军蓝染料废液具有很好的处理效果，用量少，处理浓度高，且在发生光助氧化降解的同时还伴随着光分解反应。UV／H0：体系的光助氧化反应和uV体系的光分解反应均为表观一级反应，前者活化能9．71kJ·mol～，指前因子I．61min一，后者活化能50．3kJ·mol～，指前因子3．88x10min一。染料溶液初始pH为强碱性(pH=12)时染料降解率最大。关键词：双氧水，光降解，丽华实军蓝，反应速率常数，活化能中图分类号：0643文献标识码：AWiththedevelopmentofthetexti

6、leanddyein—asphotocatalyticoxidation，ozoneoxidation，H202dustry，thevarietyandquantityofdyeconsumptionphoto·oxidation，Fentonmethod，etc．，havereceivedkeepincreasing．Consequently，textilewastewaterareconsiderableattentionasalternativesorcomplementsoneofthemajorwaterpollutants．Textilewas

7、tewaterstoconventionalwaterandwastewatertreatments．InhavepropertiessuchlikestrongCOlOrS，highchemicalthisstudy，LevMixNavy(fromDystar，adyeusedinoxygendemand(COD)contents，lowbiodegradability，clothingindustry)watersolution，isemployedtomim—fluctuatingquality，etc．Theyareconsideredasoneo

8、fthehardestindustria1wastewaterst