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1、鄭州大學(xué)碩士學(xué)位論文啤酒酵母和谷殼對水體中銅鉛離子的吸附研究姓名：張敬華申請學(xué)位級別：碩士專業(yè)：分析化學(xué)指導(dǎo)教師：石杰韓潤平20050501整爛去堂亟量；壟垃淦奎一——ABSTRACTTlesocalledbiosorptionisacombinativefunctionofbiologymaterialstemovalthepollutantincludingheavymetalsion。Inthispaperweselectedth

2、escrapbeeryeastandagriculturaloutgrowthofchaffasthebiologyadsorbentandselectedcopperandleadastheheavymetalstobeadsorbed骶lebiosorptionofbeeryeastandchafftoCuzandpbzinsinglemetalsystemwasstudiedn氆edifferentconditions。sucha

3、spHvaluetheini垃alconcentrationofmetalsion，thedoseofadsorbent，theadsorbingtime，theadsorbingtemperatureTwokindsofmetalsioncompetitiveadsorptionwerealsostudiedbytwokiadsofbiosorbenttwhenCu2andPb”arecoexistenceintheaquaticsy

4、stemTheresultsofexperimentsuggestedthatthebeeryeastandchaffbothhavetheadsorbabilitytotheheavymetalsionofCU2andpb2wellneveloc蚵oftwokindsofadsorbentsadsorbstothemetalsionbothquickintenminutesthereactionofremovalhavenearlyr

5、eachedequilibriumThebeeryeastandcha踅havenoselectivitytoadsorbe彭’andpbzandcansimultaneouslyremovalmetalsfromSolution。furthermore，theabilhofadsorbentdidnotchangeInthenormaltemperature20℃，thepHvalueoftheaqueoussolutionwas50

6、orsotheinitialconcentrationofCuzandPblvcas20mgL1and80mg‘L“respectivelythemaxiumequilibriumadsorptivequantityofbeeryeastwere149mg’g‘a(chǎn)nd441mgg‘。andtheequilibriumadsorptivequantityofchaffwerel。78mg‘gqand7。04mg。g～Theadsorbed

7、abilityofchafftotheheavymetalsionexcelledthatofbeeryeastItisbenefittotheadsorptionofcopperwhenthetemperarureincreased，andtheresultisoppositetotheadsorptionofleadIntheacidterm，highofthevaluepHisbenefit據(jù)theadsorbreaction。翻

8、eequilibriumadsorbmodelofbeeryeastandc磁垂。C礦andPb“allmatchwelltoLangmuirmodelandFreunlichmodelFurthermoretheadsorptiondynamicsmodelofchaffw船studiedTheresultsexpressedthatthereactionofadsorptiononchafrtoC∥’andP釅bothmatchto

9、thepseudosecondclassreactionkineticsmodel。Chaffadso南scopperandleadionsfromsolutioninfixedbedcolumnandtheeffectofseveralimportantparametersincludingthepHvaluecurrentveloeityandtheinitialmetalsionconcentrationofinflowandth

10、ecoexistencesmetalsionetcwasdiscussedThe骶lomasmodelwasappliedtoadsorptionbychaffcolumnatdifferentflowrateanddifferenti疰l菇concentrationlopredictthebreakthroughcllfvesandtodeterminethecharacteristieparametersofthecolumnand

11、themaximumadsorptionquantityTheexperimentalresultsexpressedthatwhenpHvalueofthesolutionisbelow7，thehi曲pHvaluethehighinitialconcentrationmetalsionlowcurrentvelocity、)l能benefitedtoenhancetheadsorptionefficiencyofchaffandth

12、eadsorptionquantityofequilibrium。囅eThomasmodelwasfoundsuitablefordescribingthedynamicbehaviorofthebiosorptionprocessofCu2andpb2onthechaffcolumnnleresultofadsorptiorgdesomtionrecyclesexperimentssuggestthattheadsorptionabi

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