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1121．4340232．430074。550、650750℃、3Langmuir、Freundlich。。Freundlich。310．86、11．2710．95kJ/mol。。X171A0517－6611201101－00405－03PhosphateAdsorptionofResidualBiomassCharbyPyrolysisPENGFengetalSchoolofurbanConstructionofYangtzeUniversityJingzhouHubei434023AbstractObjectiveTheaimwastostudyadsorptionofphosphorusinwaterbyresidualbiomasschar．MethodTheadsorptionkineticsandisothermofphosphatebybiomasscharobtainedatdifferenttemperatureswerestudied．Thepseudofirst-orderpseudosecond-orderintra-par-ticlediffusionmodelsandLangmuirFreundlichisothermmodelswereemployedtofitexperimentaldata．ResultTheresultsshowedthattheadsorptionofphosphatefollowedthepseudosecond-orderkineticsmodelandtheequilibriumadsorptioncapacityandadsorptionrateincreasedwiththeincreasingofpyrolysistemperature．TheadsorptionisothermwasdescribedbyFreundlichmodelwhichsuggestedthatmultipleproces-sescontrolledthesorptionofphosphatebybiomasschar．Theadsorptionactivationenergyofbiomasscharsatdifferenttemperatureswere10.8611．27and10．95kJ/molwhichindicatedthatitbelongedtophysicsadsorption．ConlusionThebiomasscharwasapprovedthatithadagoodeffectonadsorbingphosphate．KeywordsBiomasscharAdsorptionkineticsAdsorptionisothermPhosphate1964－、。2010-09-281。、2－4。、。30%～40%。56－7。8－9。550、650750℃、。11．1550、650、750℃BC550、BC650BC75080～1001。10。1Table1UltimateandproximateanalysisofbiomasscharAbsorbentCHOaNSVolatilepointsFixedcarbonAshBC55070．68%3．60%23．11%2．40%0．21%23．95%63．72%12．33%BC65074．92%2．88%19．48%2．45%0．27%16．57%68．11%15．32%BC75078．75%2．93%15．11%2．92%0．29%10．64%71．44%17．96%a。Noteastandsforcalculationwithsubtractionmethod．1．21．2．1。100ml30mg/L400ml1g/L25℃240min30min。1．2．2。400ml10、20、30、40、5060mg/L1g/L25℃240min30min。1．2．3。VarioMicroCubeCARY50Probe－。qmg/gJournalofAnhuiAgri．Sci．2011391405－407411q=C0－Ce×V/m1C0Cemg/LVmlmg。22．130mg/L25、3545℃1。3qt-t。60min90%。120min。550℃750℃240minq2409．80mg/g14．4mg/g25℃。1Fig．1Variationofabsorptioncapacitywithtimeunderdifferenttemperature、3。11lnqe－qt=lnqe－k1t212tqt=1k2q2e+tqe313qt=kpt1/242－4qe、qttmg/gk1min－1k2g/mg·minkpmg·g－1·min－0．5。2R20.99。。qeqe。、14。qe15。2。3。BC750qeexp14mg/gBC55010mg/g。1。。600℃。2Table2AdsorptivekineticparametersofphosphatebybiomasscharHalfburntT℃qeexpmg/gFirstorderkineticmodelqecalmg/gk1min－1R2Secondorderkineticmodelqecalmg/gk2×103g/mg·minR2Diffusionmodelinparticlekpmg·g·min0．5－1R2BC550259．808．540．03040．979010．674．4980．99761．17580．99573510．129．390．03690．977711．055．0980．99821．23190．9952459．998．150．04000．982610．716．9610．99801．28800．9872BC6502512．179．450．03070．972413．044．6020．99831．51360．99683512．5410．760．03850．969013．485．2100．99871．50870．99084512．089．320．04080．984012．807．1010．99881．45440．9752BC7502514．4011．010．03180．978515．773．5210．99691．92440．99043514．5912．880．04060．995715．824．0600．99672．01160．98014514．3610．950．04190．974215．464．7070．99612．05890．9735604201116－17。2．225℃10、20、30、40、5060mg/L2。3。3BC750。2Fig．2Relationshipbetweenequilibriumconcentrationsande-quilibriumadsorptionLangmuirFreundlich。Langmuir181qe=1qmKL×1Ce+1qm5。Freundlich18lnqe=lnKF+1nlnCe6。qmmg/gqemg/gCemg/LKL、KF、n。3BC550BC6502FreundlichLangmuirBC7502。Langmuir。Freundlich。3LangmuirFreundlichTable3ParametersofLangmuirandFreundlichmodelAbsorbentLangmuirLangmuirmodelqmmg/gKLL/mgR2FreundlichFreundlichmodelKF1/nR2BC5509．707．63700．89386．480．13790．9982BC65011．7624．290．92748．220．13390．9870BC75013．7655．920．963310．120．12170．9392。Langmuir550℃750℃KL。2．3Arrheniuslnk=－EaRT+C7kEakJ/molR8．314J/mol·KTKC。2k2。3lnk2－1000/T3。3BC550、BC650BC750310．86、11．2710．95kJ/mol。8．37～25．10kJ/mol83．72kJ/mol1519。3。3lnk1/TFig．3Relationshipbetweenlnkand1/T3。Freundlich。Arrhenius310．86、11．2710．95kJ/mol。1．J．200928101687－1692．2BARNETOAGCARMONAJAALFONSOMJEetal．KineticmodelsbasedinbiomasscomponentsforthecombustionandpyrolysisofsewagesludgeanditscompostJ．JournalofAnalyticalandAppliedPyrolysis2009861108－114．3LUOSYXIAOBHUZetal．Hydrogen-richgasfromcatalyticsteamgasificationofbiomassinafixedbedreactorInfluenceoftemperatureandsteamongasificationperformanceJ．InternationalJournalofHydrogenEnergy20093452191－2194．4NAKORNWORASUWANNARAKTAROSONOBEAWIWUTTAN-THAPANICHAKOON．PyrolysisbehaviorsofricestrawricehuskandcorncobbyTG-MStechniqueJ．JournalofAnalyticalAppliedPyrolysis2007782265－271．5KASTNERJRMILLERJDASKC．Pyrolysisconditionsandozoneoxi-dationeffectsonammoniaadsorptioninbiomassgeneratedcharsJ．Jour-nalofHazardousMaterials20091642/31420－1427．411704391、ⅡⅡ。、、、。2Table2EnvironmentalcharacteristicsofartificialvegetationcommunitiesinJueweishanofTaiyuanNo∥mElevationAspectGradientNumbersofspeciesDominantSpeciesArborShrubHerbⅠ993～1091ES60～7514．67－Ⅱ1006～1317ESE35～8013．00－Ⅲ990～1305ESE10～8014．27Ⅳ1290～1317ESE40～8014．00Ⅴ1237～1305SN45～7014．42－Ⅵ1185～1330NNW15～7019．00Ⅶ925～951ESE0～5524．43NotePinustabulaeformisCotinuscoggygriaPlatycladusorientalisUlmuspumilaLespedezafloribundaLigustrumquihouiWikstroemiachamedaphneMeissnRosaxanthinaVitexnegundovat．HeterophyllaOstryopsisdavidianaCarexlanceolataBupleurumchinenseArtemisiasacrorumLedebArtemisiagmeliniiAsparagusschoberioidesCleistogenessquarrosHeteropappusaltaicusBidensparviflora。1．J．1995153268－277．2．J．2004225606－612．3．J．2000