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46920189CHEMICALENGINEERINGCHINAVol.46No.9Sep.20182018-01-052016YFB0302901-310652115320800201992—PVA18762650301E-mail18762650301@163.comE-mailgemingqiao57@163.com。PVA1212121.2.214122PVAPVA、、pHPVA。。20℃18g/hpH7PVApH。100mLPVA20000mg/LPVA240minPVA0.286mg/L100%PVAGPC1301912424PVA。。X511A1005-9954201809-0012-05DOI10.3969/j.issn.1005-9954.2018.09.003DegradationofhighconcentrationPVAwastewaterbyozonationLIUSai12GAOQiang12GEMing-qiao121.KeyLaboratoryofEcotextileEducation2.TextileandClothingInstituteJiangnanUniversityWuxi214122JiangsuProvinceChinaAbstractOzoneoxidationtechnologywasusedtodegradethehighconcentrationPVAwastewaterwhichwasobtainedbydissolvingthewastePVAtextilematerialinwater.TheoptimumprocessconditionsweredeterminedbyinvestigatingtheinfluenceoftemperatureozonepenetrationrateandinitialpHvalueonPVAdegradationandexploringthedegradationmechanismandtheengineeringpracticalityinthisconditions.Theresultsshowthatthedegradationeffectbecomeworsewithreactiontemperatureincreasingbecomebetterandthenworsewiththeozonepenetrationrateincreasingthedegradationeffectisbetterinneutralandweakalkalinesystembutpoorinstrongalkalineandacidicsystem.Theoptimalreactionconditionsareasfollowsthereactiontemperatureis20℃therateofozonepenetrationrateis18g/handthepHiskeptat7oftheoriginalPVAwastewater.Undertheoptimumconditionsdegrading100mL20000mg/LPVAwastewaterafter240minreactionthemassconcentrationofPVAisreducedto0.286mg/Lthedegradationratereachesalmost100%basicallyrealizingcompletedegradationofPVA.TheGPCrelativemolecularmassofwastewateralsodecreasedsignificantlyandthepeakrelativemolecularmassdecreasedfrom130191to2424indicatingthatthePVApolymerwasdegradedtolowrelativemolecularmasssubstance.Thisprocesshasgoodengineeringpracticality.KeywordsozonepolyvinylalcoholdegradationraterelativemolecularmassPVA、PVA、。PVA。PVA。PVACODBODPVA檪檪Http檪檪//imiy.cbpt.cnki.netBOD/COD0.30.0551。。、、2。3。4-20—70mg/LPVAPVA45.3%PVA12.1%。5/PVA100mg/LPVA99.3%。62h100%71.1%。He7-20—25mg/LPVAPVA100%AsgariG830min98%。1000mg/LPVA。PVAPVAPVA。10000mg/LPVA。PVAPVA、、pH。。PVA。11.1PVA、、、、、。FL-840AUV-18001100pHSTARTER3100。1.2PVA100mL20000mg/LPVApH720min。、、pH。PVACO32-CO32-。PVA。1.3PVAPVA。GPC。22.1pH18g/h20406080℃。PVA1240minGPC2240minGPC1Mv。1PVAFig.1ChangeofPVAdegradationrateatdifferenttemperatures·31·2018469檪檪Http檪檪//imiy.cbpt.cnki.net2240minGPCFig.2GPCprofilesafterreacting240minatdifferenttemperatures1240minTable1Relativemolecularmassdistributionsafterreacting240minatdifferentreactiontemperaturesRT/minMpMnMwPVA15.2831307911740513784620℃18.52724241447278140℃18.49525261480284460℃18.37548992929622580℃18.2745567342681911PVA9。PVAPVAPVA10。2240minGPCPVA。GPC1Mp、Mn、Mw。20℃。120℃240minPVA100%PVA0.286mg/LPVA。2.220℃pH12151821g/hPVA3240minGPC42。3PVAFig.3ChangeofPVAdegradationrateatdifferentozonepenetrationrates4240minGPCFig.4GPCprofilesafterreacting240minatdifferentozonepenetrationrates2240minTable2Relativemolecularmassdistributionsdataafterreacting240minatdifferentozonepenetrationrateRT/minMpMnMwPVA15.2831307911740513784612g/h17.208930629601089915g/h18.35929971727373318g/h18.52724241447278121g/h18.0123279155240493PVA18g/h。·41·PVA檪檪Http檪檪//imiy.cbpt.cnki.net11。·OH12。4240minGPC18g/h18g/h2MpMnMw。18g/h。18g/h18g/h。2.3pH20℃18g/hNaOHH2SO4pH57911pHPVA5240minGPC6240minGPC3。5pHPVApH9PVA。PVAOH-·OH13OH-·OHPVA·OHPVA。pH110H-CO2HCO3-CO32-HCO3-CO32-·OH·OHPVA。6pH240minGPCpH9pHpH93MpMnMwpH。pHpH9。5pHPVAFig.5ChangeofPVAdegradationrateatdifferentpH6pH240minGPCFig.6GPCprofilesafterreacting240minatdifferentpH3pH240minTable3Relativemolecularmassdistributionsdataafterreacting240minatdifferentpHRT/minMpMnMwPVA15.28313079117405137846pH=518.058316414313797pH=718.527242414472781pH=918.633236311962857pH=1118.212284119824194。pH7。2.4PVAPVAK2CO3CO32-0.51mol/LCO32-·51·2018469檪檪Http檪檪//imiy.cbpt.cnki.netPVAPVA。PVACO32-PVA7。7PVACO32-·OHCO32-·OHPVAOH-·OHPVA。7CO32-PVAFig.7EffectofcarbonateionsonPVAdegradation2.520000mg/LPVA4hPVA。PVA、、PVAPVA。PVA100mL300004000050000mg/LPVA。PVA8。8PVAFig.8ChangeofPVAdegradationrateatdifferentmassconcentrations8PVA。300004000050000mg/LPVA240minPVA85.9%75.8%63.7%60%PVA4232.8569686.89618162.48mg/L。PVA。3118g/hpH。20℃、18g/h、pH7。100mLPVA20000mg/LPVA240minPVA0.286mg/L100%PVAPVAGPC1301912424PVA。2·OHCO32-PVAOH-·OH。3300004000050000mg/LPVAPVAPVA60%。PVAPVA。1.D.2010.【72】·61·2018469檪檪Http檪檪//imiy.cbpt.cnki.net。2、、CO2。3。1.J.2014427116-119.2.J.2015437136-140.3.J.2015268-71.4.J.201415104-107.5.M.1996.6.3J.201163491-496.7.J.2004292226-229.8DASDDASHUMEHERJetal.Improvingstabilityofconcentratedcoal-waterslurryusingmixtureofanaturalandsyntheticsurfactantsJ.FuelProcessingTechnolo-gy20133811341-51.9.J.2014461065-7.10J.201644147-49.11.J.201644243-46.12.J.2012455-58.13.J.201745150-53.14.J.201644432-35.15.J.2017451檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾61-63.【16】2.D.2013.3.D.2014.4.-PVAJ.201233113854-3858.5.-J.20164641191-1198.6.J.2017124586-4592.7HEyaozhongWANGxiaojunXUJinlingetal.Appli-cationofintegratedozonebiologicalaeratedfiltersandmembranefiltrationinwaterreuseoftextileeffluentsJ.BioresourceTechnology2013133150-157.8ASGARIGSAMIEEF
本文标题:臭氧氧化技术降解高浓度PVA废水的研究刘赛
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