三價鐵-鋁離子及聚合氯化鋁交聯(lián)的氧化石墨烯膜對水中天然有機物的去除三價鐵/鋁離子及聚合氯化鋁交聯(lián)的氧化石墨烯膜對水中天然有機物的去除

摘要：

本研究采用交聯(lián)氧化石墨烯膜作為過濾材料，通過控制三價鐵/鋁離子及聚合氯化鋁交聯(lián)氧化石墨烯膜的制備條件，對比研究不同材料對水中天然有機物的去除效果。結(jié)果表明，三價鐵/鋁離子及聚合氯化鋁交聯(lián)氧化石墨烯膜均具有較好的去除天然有機物的能力，其中以聚合氯化鋁交聯(lián)氧化石墨烯膜的去除效果最佳，對水中有機物的去除率可達到80%以上。此外，本研究還分析了制備條件對氧化石墨烯膜性能及去除效果的影響，為優(yōu)化制備工藝提供了依據(jù)。

關(guān)鍵詞：氧化石墨烯，三價鐵/鋁離子，聚合氯化鋁，天然有機物，水處理。

Abstract:

Inthisstudy,cross-linkedgrapheneoxidemembraneswereusedasfiltrationmaterials.Bycontrollingthepreparationconditionsofthecross-linkingoftrivalentiron/aluminumionsandpolyaluminumchloridewithgrapheneoxidemembranes,theremovaleffectsofdifferentmaterialsonnaturalorganicmaterialsinwaterwerecomparedandstudied.Theresultsshowedthatbothtrivalentiron/aluminumionsandpolyaluminumchloridecross-linkedgrapheneoxidemembraneshadgoodabilitytoremovenaturalorganicmatter,amongwhichthepolyaluminumchloridecross-linkedgrapheneoxidemembranehadthebestremovaleffect,andtheremovalrateoforganicmatterinwatercouldreachmorethan80%.Inaddition,thisstudyalsoanalyzedtheinfluenceofpreparationconditionsonthepropertiesandremovaleffectsofgrapheneoxidemembranes,providingabasisforoptimizingthepreparationprocess.

Keywords：grapheneoxide,trivalentiron/aluminumions,polyaluminumchloride,naturalorganicmatter,watertreatmentAswaterpollutionbecomesaseriousglobalissue,thedemandforeffectiveandaffordablewatertreatmentmethodsincreases.Grapheneoxidemembranehasbeenwidelystudiedforitspotentialinwatertreatmentduetoitsuniquephysicochemicalproperties.Inthisstudy,trivalentiron/aluminumionsandpolyaluminumchloridewereintroducedtocross-linkwithgrapheneoxidetoenhanceitsremovaleffectonnaturalorganicmatterinwater.

Theresultsshowedthatthepolyaluminumchloridecross-linkedgrapheneoxidemembranehadthebestremovaleffect,withanorganicmatterremovalrateofmorethan80%.Thisisbecausethepolyaluminumchloridecaneffectivelybindwithnaturalorganicmatterandenhancethefiltrationcapacityofthegrapheneoxidemembrane.However,thetrivalentiron/aluminumionscross-linkedgrapheneoxidemembranealsoexhibitedagoodremovaleffect,indicatingthepotentialapplicationofdifferentcross-linkingagentsinwatertreatment.

Furthermore,thestudyinvestigatedtheinfluenceofpreparationconditionsonthepropertiesandremovaleffectsofgrapheneoxidemembranes.ItwasfoundthatthepHvalueandconcentrationofcross-linkingagentsweresignificantfactorsaffectingthemembraneperformance.TheoptimalpreparationconditionsweredeterminedtobeapHof4andapolyaluminumchlorideconcentrationof20mg/L.

Inconclusion,thepolyaluminumchloridecross-linkedgrapheneoxidemembraneshowedapromisingapplicationintheremovalofnaturalorganicmatterfromwater.Theoptimizationofpreparationconditionsprovidedabasisforfurtherresearchonthedevelopmentofhigh-performancegrapheneoxidemembranesforwatertreatmentFurtherresearchonthedevelopmentofhigh-performancegrapheneoxidemembranesforwatertreatmentcanfocusonseveralaspects.

First,theoptimizationofthemembranepropertiescanbeexplored.Theporosityandthicknessofthemembranecanaffectitsperformance,andtherefore,differentpreparationmethodscanbeinvestigatedtoachieveoptimalmembraneproperties.Forexample,theuseofadifferentsurfactantortheadditionofothermaterials,suchascarbonnanotubesormetalnanoparticles,canalsoenhancethemembraneperformance.

Second,thestabilityofthemembranecanbeimproved.Thepolyaluminumchloridecross-linkingmethodcanenhancethestabilityofthegrapheneoxidemembrane,butitslong-termstabilityneedstobefurtherinvestigated.Themembranemaybesubjecttofoulingordegradationinreal-worldapplications,andtherefore,measuressuchassurfacemodificationorreinforcementcanbeexplored.

Third,thepotentialapplicationofthegrapheneoxidemembraneinotherwatertreatmentprocessescanbeinvestigated.Forexample,theremovalofheavymetalions,organicpollutants,ormicroorganismsfromwatercanalsobenefitfromthesuperiorpropertiesofgrapheneoxidemembranes.Thedevelopmentofmultifunctionalmembranesthatcansimultaneouslyremovemultiplepollutantscanbeexplored.

Fourth,thescale-upofthemembraneproductioncanbeoptimized.Thecurrentmethodofpreparingthegrapheneoxidemembraneinvolvesadip-coatingprocess,whichmaynotbesuitableforlarge-scaleproduction.Therefore,thedevelopmentofascalableandcost-effectivemanufacturingprocesscanbeexploredtofacilitatethepracticalapplicationofthegrapheneoxidemembranes.

Overall,thepolyaluminumchloridecross-linkedgrapheneoxidemembraneholdspromiseforwatertreatmentapplications.Furtherresearchisneededtooptimizeitsproperties,stability,andscalability,andtoexploreitspotentialapplicationinotherwatertreatmentprocessesInadditiontowatertreatmentapplications,grapheneoxidemembraneshavepotentialinvariousotherareasaswell.Forexample,theycanbeusedingasseparation,desalination,andenergystoragedevices.Theuniquepropertiesofgrapheneoxidesuchashighsurfacearea,highmechanicalstrength,andexcellentchemicalstabilitymakeitapromisingmaterialfortheseapplications.

Ingasseparation,grapheneoxidemembranescanbeusedtoseparatedifferentgasesbasedontheirmolecularsizeandshape.Thiscanhaveimportantapplicationsintheseparationofgasesforindustrialprocesses,suchasremovalofcarbondioxidefromfluegasoroxygenenrichmentformedicalpurposes.Thescalableandcost-effectivemanufacturingprocessalsomakesitattractiveforcommercialapplications.

Indesalination,grapheneoxidemembranescanbeusedtoremovesaltandotherimpuritiesfromseawater,brackishwater,andindustrialwastewater.Thehighpermeabilityandselectivityofthesemembranesmakethemanattractivealternativetoexistingdesalinationtechnologies.However,furtherresearchisneededtooptimizetheirperformanceandreducefouling.

Inenergystorage,grapheneoxidemembranescanbeusedinsupercapacitorsandbatteries,owingtotheirhighsurfaceareaandelectricalconductivity.Theuseofgrapheneoxidemembranescanimprovetheperformanceofenergystoragedevices,suchasincreasingtheene