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PDMS渗透蒸发膜的制备及其处理含酚废水的研究.docx

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PDMS渗透蒸发膜的制备及其处理含酚废水的研究 Abstract Inthisstudy,weexploitedPDMS(Polydimethylsiloxane)membraneforthetreatmentofphenol-contaminatedwastewater.ThePDMSmembranewaspreparedthroughacombinationofsolventevaporationandthermaltreatment,anditspermeationcharacteristics,includingfluxandrejection,wereanalyzed.Theeffectsofvariousparameters,suchasfeedconcentration,solutionpH,andtrans-membranepressure,wereassessedtooptimizethemembraneperformance.ThePDMSmembraneexhibitedexcellentpermeationpropertiesandhighselectivitytowardsphenolcomparedwithothercontaminants,resultingin98.5%removalefficiency.Finally,themembranes’stabilitywasevaluated,andtheresultsshowedthatthemembranesmaintainedhighfluxandrejectionduringprolongedoperation. Keywords:PDMSmembrane,phenolwastewatertreatment,solventevaporation,thermaltreatment,stability. Introduction Phenol,anorganicpollutant,iswidelyusedinvariousindustries,includingpetrochemicals,leather,dyes,plastics,andpharmaceuticals,resultinginitssubstantialpresenceinindustrialwastewater.Phenolpollutioncausessevereenvironmentalandhealthhazardssincetheyaretoxicandinhibitthegrowthofmicroorganisms.Traditionalwastewatertreatmentmethods,suchascoagulation-flocculation,adsorption,andbiologicaltreatments,showsomelimitationsintheirapplicationtotreatphenolwastewaterduetofactorssuchaslowefficiency,generationofsecondarypollutants,andhighoperationalcosts(Wangetal.,2012).Therefore,thedevelopmentofefficientandeco-friendlywastewatertreatmenttechnologiesisincreasinglyimportant. Membranefiltrationhasbeenidentifiedasanefficienttechnologyfortreatingvariousorganiccontaminantsduetoitshighremovalefficiency,cost-effectiveness,andlowenergyconsumption(Kumaretal.,2020).Inthisstudy,wechosetoexplorePolydimethylsiloxane(PDMS)membraneduetoitshighorganicsolventresistance,hydrophobicity,andgoodchemicalstability.PDMScanbefabricatedthroughacombinationofsolventevaporationandthermaltreatmentatlowtemperatures,whichcanimprovethemembrane’smechanicalstability,surfaceporestructure,andselectivesurfaceproperties(L