催化臭氧氧化法处理煤化工高盐废水

36820188EnvironmentalEngineeringVol．36No．8Aug．2018*200237、。1685N45d1.67%pH=8.17g/L13mg/minCOD45%85%。·OH。DOI10.13205/j．hjgc．201808011TＲEATMENTOFHIGH-SALTWASTEWATEＲFＲOMCOALCHEMICALINDUSTＲYBYCATALYTICOZONEOXIDATIONＲENMingSUNShu-yingJINYanSONGXing-fuYUJian-guoSchoolofＲesourcesandEnvironmentalEngineeringEastChinaUniversityofScienceandTechnologyShanghai200237ChinaAbstractThehigh-saltorganicwastewaterwastreatedbycatalyticozoneoxidationwithself-madecatalyst．Thecatalystperformanceandtheeffectsofcatalyticozoneoxidationwerestudiedandthemechanismofcatalyticozoneoxidationwasinvestigated．Theexperimentalresultsshowedthatthecompressivestrengthofself-madecatalystwas1685Nandthewearratewas1.67%for45days．Undertheexperimentalconditionsofcatalystdosageof7g/Lozonedosageof13mg/minandpHof8.1theremovalrateofCODandchromawere45%85%respectively．FTIＲanalysisshowedthattherewerehydroxylgroupsonthesurfaceofthecatalyst．Thecatalyticozonedecompositionratewasfasterthanthatoftheozonealoneatthesametimethecatalystpromotedozonedecompositiontoproducemorehydroxylradicals．Thusitwasprovedthatthemechanismofcatalyticozoneoxidationfollowedhydroxylradicalreactionmechanism．Keywordscatalyticozoneoxidationhigh-saltorganicwastewaterozonedecompositionhydroxylradicalssurfacehydroxyl*317010-3。2017－11－21070%“”90%21%“”。1、、2、、3。。4·OH6。7、8、。·OH。8、、·OH。11.1、、、、25-、、。、、、。。SOZ-YB-16GCONTOW-4TBBMT964BTCOD-571-1COD-571CODUNICO4802UV/VISPHSJ-3FpHCX-12TSX2-4-10XBDMETTLEＲTOLEDOAL204。1.21.2.1、、40∶30∶15∶∶158mm105℃12h1000℃1h。1.2.24.5cm100cm1300mL。、30min。。2。1.2.31L10g1.5L/min。1.3pHPHSJ-3FpHCOD10GB11903—1989《》1—2—3—4—5—6—7—8—9—。1Fig．1Experimentalapparatus。6890GC－5973MS－HP5MS30m×0.25mm×0.25μm1mL/min。·OH12300μmol/L1L·OH25-·OH。25-1260SLG1314FSynergiPolar-ＲP4.6mm×150mm4μmV0.1%∶V=80∶201mL/min215nm30℃20μL。22.12.1.1、101。1685N。。1Table1Compressivestrengthofcatalyst/N16853372032.1.2、55362。、1.5L/min45d1.7%、13.8%17.5%。。———■——●—。2Fig．2Wearrateofcatalyst2.22.2.12。ρCOD300～350mg/L70～80ρCOD≤200mg/L≤15COD。2Table2ＲoutinewaterqualityindicatorspH7.6～8.78.1ρCOD/mg·L－1300～350325/70～8075ρNa+/mg·L－19880～100509965ρK+/mg·L－1346～364355ρMg2+/mg·L－1836～928882ρAl3+/mg·L－10.4～0.60.5ρSO2－4/mg·L－113370～1549014430ρCl－/mg·L－15900～60005950ρNO－3/mg·L－14212～45844398/%4.3～4.74.5GC-MS3。34%、、、49%、7.8%13。3Table3Analysisoforganiccompoundsinwastewater/%/%27.20-15-2.573-14.302.419.306--5-2.204--2-4.704--2-2.00235-4.50112-1.8123-3.39-2-1.63113-3.341.452-3.154--124--3-1.313.0025-1.274--4--2-2.702.2.213mg/min3g/L30min3。、、COD22%、25%、29%33%75%、79%、82%83%。。COD—■—。3CODFig．3EffectofcatalystspeciesonCODandchromaticityremovalrate2.2.3pH13mg/min3g/LpH4。pHpH68COD22%33%75%83%pH810COD。pH8～10pH8.1。658—■—COD——。4pHCODFig．4EffectofpHonCODandchromaticityremovalrate2.2.43g/LpH5。COD6mg/min13mg/minCOD11913mg/min20mg/minCOD21。。13mg/min。—■—COD——。5CODFig．5EffectofozonedosageonCODandchromaticityremovalrate2.2.5pH13mg/min6。COD。1g/L9g/LCOD185。COD·OH。7·OHCOD。—■—COD——。6CODFig．6EffectofcatalystdosageonCODandchromaticityremovalrate—■—COD—▲—·OH。7COD·OHFig．7EffectofcatalystdosageonCODremovalrateandhydroxylradicalconcentrationρCOD≤200mg/L≤15。7g/LCOD45%85%ρCOD300～350mg/L165～192.5mg/L8012。2.32.3.1·OH2070—9015-17·OH。。。。3.2mg/L、7536·OH8—10。600s2.57mg/L4×10－4s－1·OH12.6μmol/L600s1.7mg/L1.1×10－3s－1·OH22.5μmol/L。·OH。—■—O3—●—O3/。8Fig．8Ozonedecompositionprocess—■—O3—●—O3/。9Fig．9Ｒeactionkineticsofozonedecomposition10·OHFig．10Concentrationof·OHproducedbyozoneoxidationwithandwithoutcatalytic2.3.2———18。11。3445.129222853cm－11636.9cm－1。。11Fig．11FTIＲspectrogram311685N45d1.67%。2pH=8.17g/L13mg/minCOD45%85%ρCOD≤200mg/L≤15。3———·OH。·OH。1LuoHLingH．ApplicationofdoublemembraneinsaltwastewatertreatmentofcoalchemicalindustryJ．EnvironmentalScience＆Management201641269-72．2JiaSHanYZhuangHetal．SimultaneousremovaloforganicmatterandsaltionsfromcoalgasificationwastewaterＲOconcentrateandmicroorganismssuccessioninaMBＲJ．BioresourceTechnology20172415517-524．8583WangYYangJWangJetal．Progressinevaporationofhigh-salinitywastewaterfromcoalchemicalindustryJ．InorganicChemicalsIndustry201749110-14．4．J．201737179-82．5ＲivasFJCarbajoMBeltránFJetal．PerovskitecatalyticozonationofpyruvicacidinwateroperatingconditionsinfluenceandkineticsJ．AppliedCatalysisB-Environmental2006621/293-103．6lvarezPMBeltránFJPocostalesJPetal．PreparationandstructuralcharacterizationofCo/Al2O3catalysisfortheozonationofpyruvicacidJ．AppliedCatalysisB-Environmental2007723/4322-330．7．J．2017405102-106．8．NOJ．20173871270-1280．9．MgOJ．201737648-51．10．CODJ．20162419-20．11．p-CNBJ．20096071687-1692．12LeiZSunZZMaJ．NovelrelationshipbetweenhydroxylradicalinitiationandsurfacegroupofceramichoneycombsupportedmetalsforthecatalyticozonationofnitrobenzeneinaqueoussolutionJ．EnvironmentalScienceandTechnology200943114157-4163．13．J．201446650-54．14．J．201737157-60．15BeharDCzapskiGDuchovnyI．CarbonateradicalinflashphotolysisandpulseradiolysisofaqueouscarbonatesolutionsJ．JournalofPhysicalChemistry197074102206-2210．16ChristensenHSehestedKCorfitzenH．ＲeactionofhydroxylradicalwithhydrogenperoxideatambientandelevatedtemperaturesJ．JournalofPhysicalChemistry19828691588-