简介：Inthispaper,thedensityfunctionaltheoryhasbeenusedtoperformacomparativetheoreticalstudyofwatermonomer,dimer,trimer,andbilayeradsorptionsontheBe(0001)surface.Inourcalculations,theadsorbedwatermoleculesareenergeticallyfavouredadsorbedontheatopsites,andthedimeradsorptionisfoundtobethemoststablewithapeakadsorptionenergyof～437meV.Furtheranalyseshaverevealedthattheessentialbondinginteractionbetweenthewatermonomerandthemetalsubstrateisthehybridizationofthewater3a1-likemolecularorbitalwiththe(s,pz)orbitalsofthesurfaceberylliumatoms.Whileinthecaseofthewaterdimeradsorption,the1b1-likeorbitaloftheH2Omoleculeplaysadominantrole.

简介：Theadsorptionofproteinonnanoparticleswasstudiedbyusingdynamiclightscatteringtomeasurethehydrodynamicsizeofbothpureproteinandnanoparticlesadsorbedwithdifferentamountsofprotein.Thethicknessoftheadsorbedproteinlayerincreasesasproteinconcentration,butdecreasesastheinitialsizeofnanoparticles.Afterproperlyscalingthethicknesswiththeinitialdiameter,weareabletofitallexperimentaldatawithasinglemastercurve.Ourexperimentalresultssuggestthattheadsorbedproteinsformamonolayeronthenanoparticlesurfaceandtheadsorbedproteinmoleculesareattachedtotheparticlesurfaceatmanypointsthroughapossiblehydrogen-bonding.Ourresultsalsoindicatethatasproteinconcentrationincreases,theoverallshapeoftheadsorbedproteinmoleculecontinuouslychangesfromaflatlayerontheparticlesurfacetoastretchedcoilextendedintowater.Duringthechange,thehydrodynamicvolumeoftheadsorbedproteinincreaseslinearlywithproteinconcentration.

简介：Theadsorptionofxenonfromairhasaninterestinthemonitoringofnuclearexplosionoraccident,orinthetreatmentofnuclearwastegas.Inthispaper,theporestructureofseveralseriesofactivatedcarbonfibershasbeencharacterized.Theadsorptionpropertiesofxenonontheseactivatedcarbonfibersunderdifferenttemperatureshavebeenstudiedindetails.Theresultsshowthatthexenonadsorptionamountonactivatedcarbonfibersdonotincreasewithspecificsurfaceareaofadsorbents,butarecloselyrelatedtotheirporesizedistribution.Poreswhoseradiusequaltoornarrowthan0.4nmwouldbemoreadvantageoustotheadsorptionofxenon.

简介：Inthispaper,theselectiveadsorptionofLDLonchitosanmodifiedwithPEGandAsp.wasstudied.TheadsorptionrateofLDLandHDLonthedoublemodifiedchitosanwas57%and12%respoectively,TheresultsshownthatthedoublemodifiedchitosancanbeusedaadsorbentforselectivebindingtoLDL,thisworkmayhelptodevelopfunctionalcolumnsforhemoperfusion.

简介：

简介：StructuresofaseriesofactivatedcarbonfibersweremodifiedbyimpregnatingthemwithorganicandinorganicmaterialssuchasMethyleneblue(Mb)、p-nitrophenol(PNP)、NaClorbyoxidizingwithKMnO4orHNO3.Theinfluenceofporefillingorchemicaltreatmentontheirxenonadsorptionpropertieswasstudied.TheexperimentalresultsshowthatMbandPNPfillingofactivatedcarbonfibersresultinthedecreaseofxenonadsorptioncapacitiesofthesetreatedACFs,whichisduetothedecreaseoftheirsurfaceareaandmicro-porevolume.However,theadsorptioncapacityincreasesgreatlywithoxidizingtreatmentofactivatedcarbonfibersby7mol/LHNO3.

简介：吸附是为环境补习的最广泛地应用的技术之一。它的动力学意义大评估给定的吸附物和获得卓见的表演进内在的机制。有有关吸附动力学可得到的大量参考书，并且几个数学模型被开发了描述吸附反应和散开过程。然而，这些模特儿经常被雇用适合运动数据在一不合适或不适当举止。这主要是因为到可观的程度，联系模型的边界条件为数据建模被忽略。这里，我们考察了几使用得广泛地的吸附运动模型并且对他们的边界条件给予了更多的注意。我们相信评论为吸附某些意义和改进是运动建模。

简介：Investigationoftheadsorptioncharacteristicsoftolueneontwohypercrosslinkedresins.Thestaticandthekineticadsorptionwerestudied.Theequilibriumadsorptiondatewasfittedtofreundlichadsorptionisothermmodelstoevaluatethemodelparameters.Theenthalpy,freeenergy,entropyareindicativeofanexothermic,aspontaneousanddisorterdecreasingprocess.ExperimentalresultsshowthatthetwoadsorbentsarebetterthantheAmberliteXAD-4forremovingthetolueneinaqueoussolutions.

简介：Theadsorptionbehaviorofdyesonavarietyofsisalbasedactivatedcarbonfibers(SACF)hasbeenstudiedinthispaper.TheresultsshowthatthiskindofACFhasexcellentadsorptioncapacitiesforsomeorganic(dye)molecules.SACFcanremovenearlyallmethyleneblue,crystalviolet,bromophenolblueandEriochromeblueblackRfromwaterafterstaticadsorptionfor24h.at30℃.Theadsorptionamountscanreachmorethan400mg/gwhenadding50mgSACFinto50mldyesolution.Underthesameconditions,theadsorptionamountsofxylenolorangefluoresceinandEriochromeblackTwreelower.Ontheotherhand,theadsorptionamountschangealongwiththecharacteristicsofadsorbents.TheSACFsactivatedabove840℃,whichhavehigherspecificsurfaceareasandwiderporeradii,havehigheradsorptionamountsforthedyes.TheresearchingresultsalsoshowthattheadsorptionratesofdyesontoSACFsdecreasebytheorderofmethyleneblue,EriochromeblueblackRandcrystalviolet.

简介：Severalmacroporouspolymericadsorbents(NDA-999,XAD-8,X-5andXAD-2)wereemployedinthestudytoadsorbphenylaceticacidfromaqueoussolution.EffectofsaltandambienttemperatureonadsorptionwasstudiedusingNDA-999adsorbentandtheadsorptionprocessconformstoFreundlich'smodelreasonably.Adsorptiondynamicswereconductedinbatchexperimentsinordertomakeclearthemechanismofadsorptionprocess.Itisprovedthatthesquareddrivingforcemasstransfermodelcanbeadoptedtoelucidatetheprocess.Thetreatmentprocessofindustrialwastewatercontaininghighstrengthofphenylaceticacidwasproposedforcleanerproductionofphenylaceticacid.

简介：

简介：Theadsorptionofphenolandnitrophenolsonhypercrosslinkedpolymericadsorbentwasstudiedasafunctionofthesolutionconcentrationandtemperature.Adsorptionisothermsofphenolandnitrophenolsonhypercrosslinkedresinweredetermined.TheseisothermsweremodeledaccordingtotheFreundlichadsorptionisotherm.TheisothermsforphenolandnitrophenolsonhypercrosslinkedresinwereassignedasLcurves.Thermodynamicparameterswerecalculatedforallphenolandnitrophenols.Thekineticsexperimentresultsshowedthattheadsorptionrateswereofthefirst-orderkinetics.Therateconstantsat303Kwerecalculated.

简介：Inthispaper,benzeneadsorptionisothermandtheirhysteresisontwoimportantlocaldiatomitesweredeterminedat25℃,andtheirsiliconhydroxylgroup(SiOH)numberwasdetermined,theirpropertieswerereported,andtherelationshipbetweensurfacestructure,surfaceSiOHnumberpernm2andadsorptionisothermwithhysteresiswasdiscussed.Thespecificsurfacewasalsocalculatedfromtheisotherms,andpore-sizedistributionwasdetermined.

简介：

简介：Theisothermaladsorptionofdyesonavarietyofsisalbasedactivatedcarbonfibers(SACFs),andtheinfluenceofpHandtemperatureonadsorptionarediscussedinthispaper.Theresultsindicatethattheadsorptionofmethyleneblue,crystalvioletandEriochromeblueblackRonSACFsshowstypeIisothermsandcanbedescribedbytheLangmuirequationortheFreudlichequation.Theacidityofsolutionhasgreatlyinfluenceovertheadsorptionamountsofmethyleneblue,crystalvioletandEriochromeblueblackR.AspHsofthesolutionswereadjustedtoincreaseordecreasefromtheoriginalacidityofthesolution(4.7,4.1and4.0formethyleneblue,crystalvioletandEriochromeblueblackR,respectively),theamountsofdyesadsorbedonSACFsincreased.Theadsorptiontemperature(intherangeof25-50℃)exertslittleinfluenceontheadsorptionamountofmethyleneblue,crystalvioletandfluorescein.Forazodyes(EriochromeblueblackRandEriochromeblackT),however,theadsorptionamountincreasesslightlywiththeelevationoftemperature.

简介：Theadsorptionkineticsandmechanismofanovelchelateresin,macroporousphosphonicacidresin(PAR)forIn(III)wereinvestigated.Thestaticallysaturatedadsorptioncapacityis216mg·g-1resinat298KinHAc-NaAcmedium.Theapparentadsorptionrateconstantisk298=4.84×10-5s-1.TheadsorptionbehaviorofPARforIn(III)obeystheFreundlichisotherm.Thethermodynamicadsorptionparameters,enthalpychange△H,freeenergychange△Gandentropychange△SofPARforIn(III)are11.5kJ/mol,-12.6kJ/moland80.8J/mol·K,respectively.TheapparentactivationenergyisEa=3.5kJ/mol.ThemolarcoordinationratioofthefunctionalgroupofPARtoIn(III)isabout3∶1.

简介：TheinteractionsbetweenmetalionssuchasZn2+,Pb2+,Mn2+,Hg2+,Cd2+,Ni2+andchitosanhavebeeninvestigatedusingthemodelclustermodelmethodanddensityfunctionalmethod.FulloptimizationandfrequencyanalysisofallclustermodelshavebeenperformedemployingB3LYPhybridmethodat3-21Gbasissetlevelexceptmetalionswhichwereinvokedtouseeffectivecorepotential(ECP)method.Theenergychanges,andthemainstructuralparametershavebeenobtainedduringthetheoreticalstudyoftheadsorptionofmetalionsonthechitosan.Thecalculationsshowedthatthecoordinationmodesofmetalionswithchitosanmodelsweredifferent,thegeometriesofMn2+,Zn2+,Cd2+,Hg2+,Pb2+ionscoordinatedwithtwonitrogenatomsandtwooxygenatomsweredistortedtetrahedral,whilethesquareplanarstructureofNi2+coordinatedtwonitrogenatomsandtwooxygenatomswasobserved.Theheatofreactionbetweensixmetalionsandchitosanmodelsshowedtheorder:Mn2+＞Ni2+＞Zn2+＞Pb2+＞Hg2+＞Cd2+,thissuggestedthatthecoordinationstrengthofMn2+＞Ni2+＞Zn2+＞Pb2+＞Hg2+＞Cd2+.

简介：Thesorptionbehaviorandmechanismofanovelchelateresin,diglycolamidicacidresin(DAAR),forSm(lll)wereinvestigated.TheoptimalsorptionconditionofDAARforSm(lll)ispH=6.0inHAc-NaAcmedium.Thestaticallysaturatedsorptioncapacityis190mg/gresinat298K.TheSm(lll)adsorbedonDAARcanbeelutedreaching100%by0.5-2.0mol/LHCIusedaseluant.Theresincanberegeneratedandreusedwithoutapparentdecreaseofsorptioncapacity.Theapparentsorptionrateconstantisk298=1.96×10^-5s^-1.Theapparentactivationenergyis26kJ/mol.ThesorptionbehaviorofDAARforSm(lll)obeystheFreundlichisotherm.Thethermodynamicsorptionparameters,enthalpychangeΔHofDAARforSm(lll)is16.9Kl/mol.ThemolarcoordinationratioofthefunctionalgroupofDAARtoSin(111)is3.ThesorptionmechanismofDAARforSm(lll)wasexaminedbyusingchemicalmethodandIRspectrometry.ThecoordinationbondwasformedbetweenoxygenatomsinthefunctionalgroupofDAARandSin(Ill).

简介：

简介：Afteraconciseintroductionofhydrogenbondingeffectsinsolute-soluteandsolute-solventbonding,thedesignofpolymericadsorbentsbasedonhydrogenbonding,selectivityinadsorptionthroughhydrogenbonding,andcharacterizationofhydrogenbondinginadsorptionandseparationwerereviewedwith28references.