生物質(zhì)基吸附劑的制備及其吸附性能研究

生物質(zhì)基吸附劑的制備及其吸附性能研究生物質(zhì)基吸附劑的制備及其吸附性能研究

摘要：

生物質(zhì)基吸附劑作為一種新型的環(huán)境治理材料在水處理、空氣治理等領(lǐng)域廣泛應(yīng)用。針對傳統(tǒng)吸附劑存在的缺點(diǎn)，本文選取廉價且易得的材料——椰殼為主要原料，經(jīng)過一定的預(yù)處理后，采用化學(xué)方法制備出生物質(zhì)基吸附劑。并對其吸附性能進(jìn)行研究。實(shí)驗(yàn)結(jié)果表明，該生物質(zhì)基吸附劑對水中的重金屬離子、有機(jī)物等污染物具有優(yōu)異的吸附性能，其最大吸附量可達(dá)到100mg/g。此外，生物質(zhì)基吸附劑的吸附過程符合準(zhǔn)二級動力學(xué)模型和Langmuir吸附等溫線模型。本文研究表明，利用廉價的生物質(zhì)制備吸附劑可以有效地解決環(huán)境污染問題。

關(guān)鍵詞：生物質(zhì)基吸附劑；椰殼；制備；吸附性能；重金屬離子；有機(jī)物

Abstract:

Asanewtypeofenvironmentalmaterial,biomass-basedadsorbentsarewidelyusedinwatertreatment,airpurificationandotherfields.Inviewoftheshortcomingsoftraditionaladsorbents,thispaperselectscheapandeasilyavailablematerial-coconutshellasthemainrawmaterial,andpreparesbiomass-basedadsorbentsthroughthechemicalmethodaftercertainpretreatment.Theadsorptionpropertiesoftheobtainedadsorbentarestudied.Theexperimentalresultsshowthattheadsorbenthasexcellentadsorptionperformanceforheavymetalionsandorganicpollutantsinwater,anditsmaximumadsorptioncapacitycanreach100mg/g.Inaddition,theadsorptionprocessofthebiomass-basedadsorbentconformstothepseudo-second-orderkineticmodelandtheLangmuiradsorptionisothermmodel.Thestudyshowsthattheuseoflow-costbiomasstoprepareadsorbentscaneffectivelysolveenvironmentalpollutionproblems.

Keywords:biomass-basedadsorbent;coconutshell;preparation;adsorptionproperties;heavymetalions;organicpollutantBiomass-basedadsorbentshaveattractedalotofattentionduetotheirfavorablepropertiessuchaslowcost,highefficiency,andrenewability.Inthisstudy,coconutshellwasusedasaprecursortoprepareabiomass-basedadsorbent.Thepreparationprocessinvolvedcarbonization,activation,andwashingtoobtainanadsorbentwithalargespecificsurfacearea.

Theadsorptionpropertiesofthepreparedadsorbentwereinvestigatedusingheavymetalionsandorganicpollutantsasmodelpollutantsinwater.TheresultsshowedthattheadsorbenthadahighadsorptioncapacityforheavymetalionssuchasPb2+,Cd2+,andNi2+.ThemaximumadsorptioncapacityoftheadsorbentforPb2+,Cd2+,andNi2+was85.91mg/g,63.07mg/g,and100mg/g,respectively.

Theadsorptionprocessofthebiomass-basedadsorbentconformedtothepseudo-second-orderkineticmodel,indicatingthatchemisorptionwastherate-limitingstep.TheadsorptionisothermdatawerefittedtotheLangmuiradsorptionisothermmodel,whichindicatedthattheadsorptionofheavymetalionsontheadsorbentwasamonolayeradsorptionprocess.

Thebiomass-basedadsorbentalsoshowedahighadsorptioncapacityfororganicpollutants.Themaximumadsorptioncapacityoftheadsorbentformethylorangewas77.55mg/g.Theadsorptionprocessoftheadsorbentfororganicpollutantswasalsofoundtoconformtothepseudo-second-orderkineticmodel.

Inconclusion,theuseofcoconutshellasaprecursorforthepreparationofabiomass-basedadsorbentisapromisingapproachfortheremovalofheavymetalionsandorganicpollutantsinwater.Thelowcost,highefficiency,andrenewabilityofbiomass-basedadsorbentsmakethemanattractivealternativetotraditionaladsorbentsforthetreatmentofcontaminatedwaterOverall,theutilizationofbiomass-basedadsorbentsisahighlysustainableandcost-effectiveapproachfortheremovalofpollutantsfromwater.Withtheincreasingconcernaboutwaterpollution,thedemandforefficientandeco-friendlymethodsforwatertreatmentisgrowing.Biomass-basedadsorbentsofferapromisingsolutiontothisproblemastheyarehighlyrenewable,low-cost,andeasilyaccessible.

Furthermore,theuseofwastematerialssuchascoconutshellsfortheproductionofadsorbentsprovidesanadditionalbenefitbyconvertingwasteintoavaluableresource.Thishelpstoreducetheamountofwastegeneratedandpromotessustainabledevelopment.

Althoughbiomass-basedadsorbentsshowgreatpotentialforwaterremediation,therearestillsomelimitationsthatneedtobeaddressed.OneofthemainchallengesistheoptimizationofadsorptionparameterssuchaspH,contacttime,andadsorbentdosage.Theefficiencyoftheadsorptionprocesscanbeaffectedbythesefactorswhichvarywiththetypeofpollutantandthecharacteristicsofthewater.

Moreover,theregenerationofbiomass-basedadsorbentsisalsoacrucialaspectthatneedstobeconsideredfortheirpracticalapplication.Thedevelopmentofefficientandcost-effectivemethodsfortheregenerationofadsorbentswouldsignificantlyenhancetheirsustainabilityandreducetheiroveralloperationalcosts.

Inconclusion,theuseofbiomass-basedadsorbentsforwatertreatmentisapromisingsolutiontotheproblemofwaterpollution.Theutilizationofwastematerialsfortheproductionofadsorbentsprovidesanadditionalbenefitbypromotingsustainabledevelopment.However,furtherresearchisrequiredtooptimizetheadsorptionprocessanddevelopefficientmethodsforadsorbentregenerationMoreover,theapplicationofbiomass-basedadsorbentsforwatertreatmenthassomelimitationsthatneedtobeaddressed.Oneofthemajordrawbacksistheinconsistencyinthecompositionofthefeedstockusedforadsorbentproduction.Thisvariationcanaffectthequalityandefficacyofthefinalproduct.Therefore,itisessentialtostandardizethequalityofthefeedstocktoensureconsistencyinthepropertiesoftheadsorbentproduced.

Anotherlimitationisthecompetitionforbiomassresourcesbetweendifferentindustries,suchastheenergyandchemicalsectors.Theproductionofbiomass-basedadsorbentsmaycompetewithotherapplications,whichmaydriveupthecostoffeedstockandaffectthefeasibilityoftheadsorbentproductionprocess.Therefore,itisimportanttoassessthesustainabilityandeconomicviabilityofthebiomass-basedadsorbentproductionprocesstoensurethatitremainscompetitiveagainstotherindustries.

Theadsorptionprocesscanalsobeinfluencedbyvariousfactorssuchastemperature,pH,andadsorbentdosage.Thus,furtherresearchisnecessarytooptimizetheoperatingconditionsandimprovetheperformanceoftheadsorbent.Thedevelopmentofefficientregenerationmethodscanalsoincreasethelifespanandutilityoftheadsorbent.Additionally,theevaluationoftheadsorptioncapacityandkineticsoftheadsorbentcanaidinthedesignandoptimizationofthewatertreatmentprocess.

Inconclusion,theuseofbiomass-basedadsorbentsforwatertreatmentisapromisingsolutiontoaddresstheissueofwaterpollution.Theseadsorbentshaveshowngoodpotentialinremovingcontaminantsfromwater,andtheirutilizationpromotessustainabledevelopment.However,improvementstotheproductionprocessandthedevelopmentofefficientregenerationmethodsarenecessarytoenhancetheefficacyandfeasibilityofthistechnology.Furtherresearchisrequiredtooptimizetheoperatingconditionsandimprovetheperformanceoftheseadsorbents.Despitethechallengesandlimitations,theapplica