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简介：Sphericalmacroporouscopolymersofmethylacrylateandtrimethylopropanetriacrylatewithdifferentsurfaceandporestructureweresynthesizedviasuspensionpolymerization.andtheirsurfaceandporestructurewerecharacterizedbymeasurementsofsurfacearea,apparentdensityandskeletondensityandcalculationofaverageporediameter,Theresultsrevealedthatcrosslinkingdegreeandporogentdeterminedthephysicalstructureofthesecopolymers.Someofthecopolymerswereappliedtoadsorptivepurificationofginkgoleavesextracttoenhancethecontentofflavonoids,theresultsshowedthatmostofthecopolymerscouldbyusedtoincreasetheflavonidscontent.

简介：Acomparisonoftheadsorptionofbenzoicacidandp-nitrobenzoicacidonthenewhypercrosslinkedpolymericadsorbentAM-I,withthatbymacroporousAmberliteXAD-4,includingtheequilibriumadsorptionisotherms,thedynamicadsorptionbehaviorsthroughcolumnandtheadsorptionthermodynamicswerestudied.ResultsshowthatFreundlichequationgivesafittingadsorptionisotherm.ThespecificsurfaceofAM-lisonly67%ofthatofAmberliteXAD-4,buttheadsorptioncapacitiesonAM-1aremuchhigherabout125%～166%thanthatonAmberliteXAD-4,whichiscontributedtothemicroporemechanismandpolarity.Thenegativevaluesoftheadsorptionenthalpyareindicativeofanexothermicprocess.Enthalpyandfreeenergychangesofadsorptionbothmanifestaphysic-sorptionprocess.Thenegativevaluesoftheadsorptionentropyindicatethattheadsorptioniswellconsistentwiththerestrictedmobilitiesandtheconfigurationsoftheadsorbedbenzoicacidmoleculesonthesurfaceofstudiedadsorbentswithsuperficialheterogeneity.Bothadsorbentswereusedinmini-columnexperimentsforadsorbingbenzoicacidexpectingtoelucidatethehigherbreakthroughadsorptioncapacityofthenewhypercrosslinkedpolymericadsorbentAM-1ascomparedwiththatofAmberliteXAD-4.

简介：Theadsorptiondynamicsforphenolinaqueoussolutionoftheadsorbentbasedonpolystyrenewasstudied.InordertodistinguishwiththeBoydquasi-homogeneousmodeloftheinnerstructureofion-exchanger,theparticlediffusionmodelincludingsurfacediffustionmodelandporediffusionmodelwassuggestedwhichissuitabletothemacroporousadsorbent.Thediffusiondeterminationstepoftheadsorptionpocesswasestablishedandtheeffectivediffusioncoefficientwasalsodetermined.Theinfluenceofsurfacediffusionandporedifusionontheparticlediffusionratewasinvestigatedqualitatively.Allofthesewereveryimportanttoimprovethestructureofthemacroporousadsorbentinordertoimprovethemass-transferrate.

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简介：Topreparemanganese-containingspinelsulfurtransferagentwithacidpeptization,ultrasonicwaveisusedforthefirsttimetomodifythestructureofsulfurtransferagentinthiswork.Minifixedbedreactorwasusedtoinvestigatetheeffectofultrasonicpower,timeandtemperatureonthestructureandoxidationadsorptionperformanceofsulfurtransferagentandtheadsorptionkineticsandmechanismofSO2wereanalyzed.SEM,TEM,XRDandN2adsorption-desorptiontechniqueswereemployedtocharacterizeandanalysethefunctionofsulfurtransferagent.Theresultsindicatedthatmanganese-containingspinelisakindofpromisingsulfurtransferagentandexhibitshighersulfurcapacityanddesulfurizationdegreeundertheselectedconditionsoftheultrasonicwavepowerof60%,andwiththetreatmentperiodfor3hatatemperatureof60°C.

简介：为孔雀石绿色(MG)从工业pyrolytic轮胎字符(APTC)生产的激活的碳的吸附特征上的小organics的影响被一个批方法调查。酚被选择为小organics的代表。吸附平衡，动力学和热力学上的酚的效果系统地被学习。结果显示APTC是为MG的潜在的吸附物。酚减少的存在为MG的APTC的吸附能力，但是，改进吸附的率吸附特征动力学和热力学例如平衡，没被酚影响。吸附平衡数据跟随兰米尔等温线和运动数据被pseudo-second-order很好描述运动模型。吸附过程跟随intra粒子散开模型，吸附率由超过一个过程是坚定的。热力学的学习证明吸附是一个吸热、自发的physisorption过程。

简介：Metal-organicframeworks(MOFs)haveattractedmuchattentionasadsorbentsfortheseparationofCO2fromfluegasornaturalgas.Here,atypicalmetal-organicframeworkHKUST-1(alsonamedCu-BTCorMOF-199)waschemicallyreducedbydopingitwithalkalimetals(Li,NaandK)andtheywerefurtherusedtoinvestigatetheirCO2adsorptioncapacities.Thestructuralinformation,surfacechemistryandthermalbehaviorofthepreparedadsorbentsampleswerecharacterizedbyX-raypowderdiffraction(XRD),thermo-gravimetricanalysis(TGA)andnitrogenadsorption-desorptionisothermanalysis.TheresultsshowedthattheCO2storagecapacityofHKUST-1dopedwithmoderatequantitiesofLi+,Na+andK+,individually,wasgreaterthanthatofunmodifiedHKUST-1.ThehighestCO2adsorptionuptakeof8.64mmol/gwasobtainedwith1K-HKUST-1,anditwasca.11%increaseinadsorptioncapacityat298Kand18barascomparedwithHKUST-1.Moreover,adsorptiontestsshowedthatHKUST-1and1K-HKUST-1displayedmuchhigheradsorptioncapacitiesofCO2thanthoseofN2.Finally,theadsorption/desorptioncycleexperimentrevealedthattheadsorptionperformanceof1K-HKUST-1wasfairlystable,withoutobviousdeteriorationintheadsorptioncapacityofCO2after10cycles.

简介：Inthispaper,theequilibriumsurfacetensionandthedynamicsurfacetensionofaqueousTritonX100solutionattemperature25℃weremeasuredbymeansofWilhelmyplatemethodandmaximalbubblepressuremethodrespectively.Thedeterminedcriticalmicellarconcentration(cmc)ofTritonX-100at25℃is2.2×10^-4mol/dm^3.TheadsorptionmechanicsofTritonX-100atair/solutionwasdetermined.Forthesubmicellarconcentrationsitisdiffusion-controlled.Thediffusioncoefficientwascalculatedfromtheexperimentaldataintherangeofshortlimit.Intherangeoflongtimeadsorption,thesubsurfaceconcentrationisfittedfromthemeasureddynamicsurfacetensions.

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简介：TostudytheadsorptionbehaviorofCu+inaqueoussolutiononsemiconductorsurface,theinteractionsofCu+andhydratedCu+cationswiththecleanSi(111)surfacewereinvestigatedviahybriddensityfunctionaltheory(B3LYP)andMller-Plessetsecond-orderperturbation(MP2)method.ThecleanSi(111)surfacewasdescribedwithclustermodels(Si14H17,Si16H20andSi22H21)andafour-siliconlayerslabunderperiodicboundaryconditions.CalculationresultsindicatethatthebondingnatureofadsorptionofCu+onSisurfacecanbeviewedaspartialcova-lentaswellasionicbonding.ThebindingenergiesbetweenhydratedCu+cationsandSi(111)surfacearelarge,suggestingastronginteractionbetweenthem.ThecoordinationnumberofCu+(H2O)nonSi(111)surfacewasfoundtobe4.Asthenumberofwatermoleculesislargerthan5,watermoleculesformahydrogenbondnetwork.Inaqueoussolution,Cu+cationswillsafelyattachtothecleanSi(111)surface.

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简介：Sorptionofacetanilideherbicides,metolachlor,acetochlor,pretilachlorandbutachloroneightsoilswithvariousphysicalandchemicalpropertieswasstudied,TheadsporptionisothermscouldfitFreundlichequationwell(r^2≥0.91)andtheadsorptionextentsincreasedintheorder:metolachlor

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简介：Afieldtestwiththetraditionalrotationofpaddyrice/uplandcrop(wheat)wascarriedoutonapaddysoilderivedfromredearthtoelucidatetheeffectoforganicmanureonthephoshporusadsorption-desorptionbysoilanditsPavailability.Soilsamplesweretakenfromdifferenttreatmentsatricehavestingstageandanalysed.TheisothermaladsorptionofPbythesamplesfittedverywellwithLangmuirequation,andhence,theparametersintheequation,i.e.,maximumadsorption(qm),constantrelatedtobondingenergy(k)andtheirproduct(k×qm)couldbeusedasacomprehensiveindextocharacterizethepotentialPadsorptivityofthesoil.Organo-inorganicfertilizationandorganicmanuringcoulddecreaseqmandk,whilemineralPapplicationhadlittleeffectonthem.TheisothermaldesorptionofPwassignificantlycorrelatedwithinitiallyaddedandisothermallyadsorbedP.PartofPaddedwasfixed,whichrepresentedthePfixationcapactyofsoil,andorganicmanuringcouldobviouslylowerthePfixation,ThecontentofsoilavailablePhadasignificantnegativecorrelationwithqm,kandfixedP.ItisconcluedthatorganicmanurecouldincreasethePavailabilityofpaddysoilderviedfromredearthbydecreasingqm.k,maximumbufferingcapacity(MBC=k×qm)andfixationcapacity.

简介：UsingvanderWaalscorrecteddensityfunctionaltheory(vdW-DF)methodwehaveinvestigatedtheadsorptionofacetonemoleculeonpristineandPt-dopedgraphene.Severalactivesitesforboththeinteractingsystemshavebeenconsideredintheadsorptionprocessincludingfullgeometryoptimization.Wehaveanalyzedthestructuralandelectricalpropertiesofenergeticallyfavorableconfigurations.TheresultsshowthatadsorptionofacetonemoleculeonthePt-dopedgrapheneisenergeticallypreferable.Thebindingenergyandbondingdistancearedeterminedtobe-5.277eVand2.206A,respectively,accompanyingwithchargetransferof1.11e.Furthermore,thePt-0bondisrathersignificantlyelongatedwhenacetoneisadsorbedonPt-dopedgraphene.Comparedtopristinegraphene,thePt-dopedgraphenehasstrongerinteractionwiththeacetoneandmayprovidemoresensitivesignaiforasingleacetonemolecule.Meanwhile,practically,thebandgapofPt-dopedgraphenewouldbecomereducedafteracetoneadsorption.Consequently,ourfirst-principlesstudypresentsevidenceforacoherentbenchmarkfortheapplicabilityofPt-dopedgrapheneforacetoneadsorptionanddetection.

简介：Thispaperstudieswaterandsolutetransportinsoil.ItmainlydealswiththeadsorptionbehaviorofheavymetalCd++insoilatdifferentPHvaluesandthedynamiccharac-tersofadsorptionprocessinunsaturatedstate.Throughtheoreticalanalysisandexperimentalre-search,theadsorptionisothermandtheequationsofdynamicadsorptioninsaturatedandunsatu-ratedstatesareproposed.

简介：ThispaperreportstheadsorptionofBovineSerumAlbumin(BSA)ontoDielectricBarrierDischarge(DBD)processedPoly(methylmethacrylate)(PMMA)surfacesbyaQuartzCrystalMicrobalancewithDissipationmonitoring(QCM-D)tech-nique.ThepurposeistostudytheinfluenceofDBDprocessingonthenatureandscaleofBSAadsorptiononPMMAsurfaceinvitro.ItwasobservedthatDBDprocessingimprovesthesurfacewettabilityofPMMAfilm,afactattributabletothechangesinsurfacechemistryandtopography.ExposureofthePMMAtoPhosphateBuffedSaline(PBS)solutionintheQCM-Dsystemresultedinsurfaceadsorptionwhichreachesanequilibriumafterabout30minutesforpristinePMMA,and90minutesforprocessedPMMAsurface.SubsequentinjectionofBSAinPBSindicatedthattheproteinisimmediatelyadsorbedontothePMMAsurface.ItwasrevealedthatadsorptionbehaviourofBSAonpristinePMMAdiffersfromthatonprocessedPMMAsurface.AsloweradsorptionkineticswasobservedforpristinePMMAsurface,whilstaquickadsorptionkineticsforprocessedPMMA.Moreover,thedissipationshiftofproteinadsorptionsuggestedthatBSAformsamorerigidstructureonpristinePMMAsurfacethatonprocessedsurface.ThesedatasuggestthatchangesinwettabilityandattendantchemicalpropertiesandsurfacetextureofthePMMAsurfacemayplayasignificantroleinBSAadsorptionprocess.