复合光催化材料对食品色素废水的降解研究李宗慧

0.[1].、、.、、..TiO2TiO2[2-3].TiO2[4].TiO2、、[4-6][7]70％TiO2TiO2.TiO2、、.11.1722s、2450-.SECAR71、、.1.2TiO2-TiO2-20℃1d.*450001TiO2、、、pH、、.TiO28∶2120min464nm270nmpH6～8、、120min88.1%、95.6%、97.1%.TiO2-X703.1BJournalofHenanUniversityofTechnologyNaturalScienceEdition35220144Vol.35No.2Apr.20142013-09-261987-.*1673-2383(2014)02-0089-04:13DOI:10.16433/j.cnki.issn1673-2383.2014.02.019351.325mL20mg／L125W10cm722s464nm.=A0-AA0×100％A0A.、、2450-20mg／L、、503nm、482nm、425nm.722s.22.1TiO29∶1、8∶2、7∶3、6∶4、5∶51d20mg／L25mL1.60min68.8%、81.8%、71.3%、67.0%、73.2%.[8]60minTiO260%.100min88.4%、90.6%、85.5%、84.6%、84.8%8∶2TiO2TiO2TiO2.TiO28∶2.2.28∶2220mg／L25mL2.120min79.7%92.4%.30min、120min120min-0min464nm270nm120min464nm270nm.120min464nm270nm[9].2.38∶245mg／L、15mg／L、20mg／L、30mg／L25mL4..123-902TiO2[10].[8].2.4pH8∶24pH4、6、8、1020mg／L25mL5.5pH=440minpH＝6～8pH=10.HCO3-、CO32-[11].pH＝6pH＝6.2.58∶2320mg／LpH6、、25mL722s.6.310min60minTiO2.120min388.1％、95.6％、97.1％.3TiO28∶225mL20mg／L..120min464nm270nm.pH6~8.25mL20mg／L、、120min88.1％、95.6％、97.1％.1.J.20056:3-5.2.J.45pH63913520063210:32-35.3JinYuningWuMeifenZhaoGuohuaetal.Pho-tocatalysis-enhancedelectrosorptionprocessfordegradationofhigh-concentrationdyewastewateronTiO2/carbonaerogelJ.ChemicalEnginee-ringJournal20111683:1248-1255.4.TIO2J.2006235:456-459.5.TiO2／J.20072610:1493-1496.6ZhaoBinxiaDangLipingZhangXiaolietal.PreparationofTiO2-pillaredmontmorilloniteasphotocatalystandphotocatalyticdegradationofmethylorangeJ.AppliedMechanicsandMa－terials2012190-191:534-538.7MullerCOEnglandWG.Achievingyourindoorairqualitygoals:whichfiltrationsystemworksbestJ.ASHRAEJournal1995372:24-32.8.TiO2J.2010301:35-38.9Al-QaradawiSSalmanSR.Photocatalyticdeg-radationofmethylorangeasamodecompoundJ.JournalofPhotochemistryandPhotobiologyA:Chemistry20011481-3:161-168.10.J.201042342-346.11.J.20133041769-1772.PHOTOCATALYTICDEGRADATIONOFFOODPIGMENTWASTEWATERBYCOMPOSITEPHOTOCATALYSTLIZong-hui，LIDao-rong，ZHANGYang，LIPan（SchoolofChemistryandChemicalEngineering，HenanUniversityofTechnology，Zhengzhou450001，China）Abstract:Acompositephotocatalystwaspreparedbyusingself-madeTiO2asmainbodyandperhafnateassupport.ThepreparationconditionssuchasmaterialratioslightconditionspollutantinitialconcentrationpHvaluewereoptimizedbyusingmethylorangepigmentsolutionassubstrate.Thedegradationeffectsofthecompositephotocatalystoncommonfoodpigmentssuchascarminesunsetyellowandlemonyellowwerestudiedundertheoptimumconditions.TheresultsshowedthatthecompositephotocatalystpreparedfromperhafnateandnanoTiO2ataratioof8to2hadthebesteffectindegradingmethylorangelowerinitialconcentrationresultedinbetterphotocatalyticeffecttheabsorptioneffectacceleratedthephotocatalyticdegradation.Theabsorptionpeakofmethylorangedisappearedatthemaximumabsorptionwave-length464nmafterphotocatalysis120minutesandcharacteristicpeakat270nmalsodisappearedwhichshowedthatmethylorangewasdegradedcompletely.HigherdegradationeffectwasobtainedwhenthepHvaluewasbetween6and8.Thedegradationratesofcarminesunsetyellowandlemonyellowwere88.1%95.6%and97.1%afterdegradationfor120minutes.Theresultindicatedthatthephotocatalytictreatmenthadremarkableeffectinprocessingwastewater.Keywords:nanoTiO2-perhafnatecompositesmethylorangefoodpigmentphotocatalyticdegradation92