TiO2纳米管光催化氧化-膜分离耦合工艺性能的研究
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2020-04-29 18:24:19
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第49卷增刊1工程科学与技术Vol.49Supp.12017年4月ADVANCEDENGINEERINGSCIENCESApr.2017·化学工程与材料工程·DOI:10.15961/j.jsuese.201600884TiO2纳米管光催化氧化-膜分离耦合工艺性能的研究李苗苗1,2,解立平1,2*,莎莉1,2,杜金山3,费学宁4,王嫚嫚1(1.天津工业大学环境与化学工程学院,天津300387;2.天津工业大学省部共建分离膜与膜过程国家重点实验室,天津300387;3.天津清华德人环境工程有限公司,天津300387;4.天津城建大学环境与市政工程学院,天津300384)摘要:通过光催化降解12mg/L的酸性红B废水,研究水热法制得的TiO2纳米管在光催化-膜分离三相流化床耦合反应装置(简称耦合反应装置)中的光催化降解性能及其对膜污染的影响。结果表明:酸性红B废水的降解率随水热时间和煅烧温度的增加而呈现先增加、后降低的变化趋势,膜污染则呈现先减轻、再增加的变化趋势,最佳的水热时间和煅烧温度分别为12h和400℃。膜污染随气冲洗时间间隔的增加而降低,最佳的气冲洗时间间隔为30min。耦合反应装置间歇运行时的膜污染比连续运行时的轻。与商业TiO2相比,TiO2纳米管的光催化降解性能更优,对膜污染的影响更小。关键词:TiO2纳米管;光催化;膜分离;膜污染中图分类号:O643;X791文献标志码:A文章编号:2096-3246(2017)增刊1-0220-06StudyonthePerformanceofCouplingTechnologyofTiO2NanotubePhotocatalysisOxidationandMembraneSeparationLIMiaomiao1,2,XIELiping1,2*,SHALi1,2,DUJinshan3,FEIXuening4,WANGManman1(1.SchoolofEnvironmentalandChemicalEng.,TianjinPolytechnicUniv.,Tianjin300387,China;2.StateKeyLab.ofSeparationMembranesandMembraneProcesses,TianjinPolytechnicUniv.,Tianjin300387,China;3.TianjinTsinghuaDaringEnvironmentalEng.Co.,Ltd.,Tianjin300387,China;4.SchoolofEnvironmentalandMunicipalEng.,TianjinChengjianUniv.,Tianjin300384,China)Abstract:ThephotocatalyticdegradationperformanceandtheinfluencevariationonmembranefoulingfortheTiO2nanotubecatalysts,preparedbyhydrothermalmethod,wereinvestigatedbyphotodegradingAcidredBwastewater(12mg/L)usingakindofthree-phasefluidizedbedequipmentcouplingphotocatalysisoxidationandmembraneseparation(E-PS).TheresultsindicatedthatthedegradationefficiencyofAcidredBwastewaterfirstlyincreased,andfinallydecreasedwiththeincreaseofhydrothermaltimeandcalcinationtem-perature,whiletheoppositephenomenononthemembranefoulingwasobservedandtheoptimaltimeandtemperatureweredeterminedas12hand400℃,respectively.Themembranefoulingdecreasedwithincreaseofairrinsingtimeintervals,andtheoptimalintervalswasregardedas30min.ThemembranefoulinginE-PSduringintermittentoperationwaslowerthanthatduringcontinuousoperation.Comparedtothecomm
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