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1、多酸盐钨酸铵对甲基橙光催化降解的研宄安徽农业科学,JournalofAnhuiAgri.Sci.2007,35(35):11343-11344,11346责任编辑姜丽责任校对王淼多酸盐-钨酸铵对甲基橙光催化降解的研究1112勾华,罗宿星,伍远辉,舒火明(1.遵义师范学院化学系,贵州遵义563002;2.海南省药用热带植物化学重点实验室,海南海门571158)摘要[目的]根据不同类别有机污染物的光催化降解机理优选新型催化剂。[方法】在光化学反应仪中,以紫外灯为光源,以多酸盐-钨酸铵为光催化剂,研究其对模拟甲基橙染料废水的光催化脱色降解的影响,讨论溶
2、液初始酸度催化剂投加量溶液的初始浓度光强、、、等对催化降解效果的影响,在300W的紫外灯光照下,研究钨酸铵降解低浓度甲基橙的动力学酸铵对甲基橙光催化脱色的最。[结果]钨佳条件为:甲基橙溶液5mg/L,在500W高压汞灯照射下,溶液初始酸度pH值为2,催化剂浓度为0.2g/L,lh脱色率可达90.8%。[结论]多酸盐-钨酸铵对甲基橙具有很好的光催化脱色降解作用,其光催化效果与溶液的初始酸度催化剂加入量甲基橙的初始浓度、、、光强等因素有关。关键词钨酸铵;光催化;甲基橙;降解;动力学中图分类号S835文献标识码A文章编号0517-6611(2007)3
3、5-11343-02StudyonAmmoniumTungstatePhotocatalyticDegradationofMethylOrangeGOUHuaetal(DepartmentofChemistry,ZunyiNormalCollege,Zunyi,Guizhou563002)Abstract[Objective]Theaimofthestudyistooptimizetheselectionofnewtypecatalystonthemechanismofammoniumtungstatephotocatalyticdegradat
4、ionofmethylorangebyusingultravioletlampinphotochemicalreactioninstrument.[Method]Theseveralimportanteffectfactorsofphotocatalyticdegradation,includinginitialpHvalueofsolution,catalystquantity,initialconcentrationofsolutionandluminousintensity,havealsobeendiscussed.Finally,the
5、kineticsofammoniumtungstatedegradesmethylorangewithlowdensityconcentrationwerediscussedbyusing300Wultravioletlampasphotosource.[Result]Theoptimaldecolorizationconditionofammoniumtungstatephotocatalyticdegradationofmethylorangeisthatmethylorangesolutionis5mg/L,undertheconditio
6、nof500Whigh(pressuremercurylamplamination,withpHvalueof2initialconcentration,catalyticconcentrationof0.2g/Landadecolorizationrateof90.8%inonehour.[Conclusion]Ammoniumtungstatehasverygooddecolorizationanddegradationeffectonmethylorange,anditsphotocatalyticeffectiscloselyrelate
7、dtoinitialacidity,catalystadditionvolume,theinitialconcentrationofmethylorange,photointensityandotherfactors.KeywordsAmmoniumtungstate;Photocatalysis;Methylorange;Degradation;Kinetics20世纪80年代末,光催化氧化开始被应用于环境污染控制领域,与传统水处理技术屮以污染物的分离浓缩以、及转移等为主的物理方法相比,光催化氧化具有明显的节能、高效、污染物降解彻底等优点[1-
8、2]。目前,对于有机染料废水的光催化降解研宄多集屮在TiO2等半导体光催化,大剂上[3-4L但TiO2并不能对所有的有机污染物都表现出光