PDMS渗透萃取膜制备及其处理苯酚废水研究

《PDMS渗透萃取膜制备及其处理苯酚废水研究》由会员上传分享，免费在线阅读，更多相关内容在学术论文-天天文库。

1、大连理工大学硕士学位论文PDMS渗透萃取膜制备及其处理苯酚废水研究姓名：朱莹申请学位级别：硕士专业：化学工程指导教师：贺高红20090701PDMS渗透摹取膜铡备及其处理苯酚废水辑究StudyonthepreparationofPDMSperstractionmembraneandtheirapplicationinphenolwastewatertreatmentAbstractRecently，thelargeamountsofdischargeofphenol—containingwastewaterfromthepetr

2、ochemicalandphenolicresinsindustriesaggravatestheenvironmentaldeteriorationandthreatensthehumanhealthseriously．However,itisnoteconomicalwithconventionalmethodstotreatphenol-containingwastewaterduetotheirseverebackmixingandsolventloss．Perstractionisatechnologycombinin

3、g、椭thpervaporationandmembraneexetractionprocess．ItisadequatefortheseparationofVOCsusingpolydimethysiloxane(PDMS)astheseparationmembraneduetoitslowenergyconsumptionandeasyoperation．ConsideringitslOWmassflux，themasstransportprocessoftheperstractionshouldbeimprovedbythe

4、developmentofnewmembranematerialsandcontactors．Inthisstudy。simulationphenolwastewaterandsodiumhydroxide(NaOH)solutionwerechosenastheresearchobjectandthestrippingsolution，respectively。强einitialphenolconcentrationofsimulationphenolwastewateris8．09·L一。neeffectsofmembran

5、ematerials．membranecontactors，andoperationconditionsofperstractionontheoverallmasstransfercoe伍cient(OMTC)ofphen01wereinvestigatedwiththeuseofsiliconrubber,home-madePDMSflatmembrane，andPDMScompositemembrane．Firstly，thetubularmembranecontactormadefromhome—madePDMSflatm

6、embranewasusedintreatmentofsimulationphenolwastewater．Thecomparisonbetweenthetubularcontactorandtwoothermembranecontactorsmadefromsilicontube，ineludingspirallywoundcontactorandtubularcontactorWaSmade。Incomparisonwiththesilicontube，themembraneresistancedecreasedandthe

7、0ⅢCofphenoiincreasedinthe曲enolwastewatertreatmentbythePDMStaremembrane．Theremovale腼ciency．OMTCandpermeationfluxofphenolwi斑PDMSflatemembranewe建97。3％，l。77×1莎7m·S．‘，6。97x10～g·m-Z·S．‘，respectively．Comparingwiththespirallywoundcontactor,theconcentrationpolarizationdecreas

8、edandtheutilizationratioofthemembraneareaincreasedwiththetubularcontactormadefromsilicontube．The0MTCofphenolwiththetubularperstract