改性粘土除氟剂硬度改善及再生性能研究陈涛

[1]1.5mg·L-1、[2][3]。。、、、、[4]、。[5-7]。[8]Al(OH)3、。11.11.1.10.3mol·L-1Al2(SO4)32%NaOH1313400℃2h830μm。1。1.1.2SX-10-12pHS-5pHPF-1HT-6AJeolJsm-6700F。1.21.2.1A。A。NaF5.37mg·L-1、1200、3h。KNaCaMgPbCdCrFeMnAl2232168409200522.76442447740982/mg·kg-11Tab.1Contentofmainmetalsinclay130021A。92.8%。NaOH、H2SO4、Al2(SO4)33Al2(SO4)30.5%Al2(SO4)3155h99.8%6。TQ424.2A1000-3770(2011)[e-mail]37920119TECHNOLOGYOFWATERTREATMENTVol.37No.9Sep.,201137DOI:10.16796/j.cnki.1000-3770.2011.09.009105℃。。1.2.2105℃1g。5.37mg·L-112003h=/。22.11100～1200℃[9]。400℃。。A、、A、A432。100100。25#18.13。A40%A10%150℃1.5h0.4026mg·g-192.8%0.4338mg·g-1。。。。2.22.2.10.3%、0.5%、1.0%、2.0%、2.5%、3.0%NaOH、H2SO4、Al2(SO4)31524h。13。1NaOH38.73%～76.94%H2SO453.96%～85.75%。SO42-OH-1Fig.1Influenceofdiffterentreganarationsolutionsonreganarationeffect0.00.51.01.52.02.53.03.5020406080100120140
%
 %123456789/h/℃1111.51.51.5222100150200100150200100150200A/%A/%1/mg·g-112/%23035403540304030351015202010151520100.39220.34940.37390.33170.40260.41840.35760.39930.41646.982.044.8708.18102.997.809.770.10.142.30.080.14.20.72.13.49.959.854.61109.9508.505.101.9416.9311.899.481018.131011.4912.9011.712Tab.2Resultsoforthogonalexperiment37938F-。Al2(SO4)3Al2(SO4)3Al2(SO4)33%128.61%SO42-Al3+F-Al3+。Al2(SO4)30.5%。2.2.2Al2(SO4)3Al3+Al3+。Al3+Al2(SO4)3。0.5%Al2(SO4)324h2。2Al2(SO4)3。1599.8%17.5。15。2.2.30.5%Al2(SO4)3153。3Al2(SO4)35h5h。5h。。2.2.4699.8%。2.2.5。SEMJeolJsm-6700FXX[10]。3、、、、74.54%、14.84%、7.26%、0.65%、0.92%。5.88%。。340%AA10%150℃1.5h。3Fig.3Influenceofreganarationtimeonreganarationeffect051015202530020406080100120
%h2Fig.2Influenceofdiffterentsolid-liquidratioonreganarationeffectandAlrelease020406080100120140
/%1:11:2.51:51:7.51:101:150.000.010.020.030.040.050.060.070.08
/mgL39!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!REMOVALOFNi2+INWASTEWATERBYMETAL-IONIMPRINTINGMODIFIEDCHITOSANTangXuejiao,YaoYan,MaHongqing,ShenBoxiong（CollegeofEnvironmentalScience&Engineering,NankaiUniversity,Tianjin300071,China）Abstract:P-C-CTS(Ni)waspreparedbycombinationpolyaminationandcross-linkedreactionswithmetal-ionimprintingtechnology.ThereactionmechanismofmodificationwasanalyzedandthesynthesisofP-C-CTS(Ni)indesirableprocesseswasvalidatedbycomparationofmoisturecontentandtheadsorptioncapacitiesofNi2+andFTIRspetraofsemifinishedproducts.Itwassuggestedthatprotectingtheactiveamidegroupsofchitosanbeforecross-linkedreactionwasverynecessary.AtlowconcentrationofNi2+(CNi＝0.852mmol·L-1),theeffectsofpHontheadsorptioncapacitiesofNi2+andremovalrateofNi2+wereinvestigated.TherulesoftheeffectsofpHontheadsorptioncapacitieswereinaccordancewiththeeffectsontheremovalrateofNi2+.Theadsorptionmechanismwasdiscussed.After8cyclesofadsorption-desorption-regeneration,thecolorandappearanceofP-C-CTS(Ni)didnotchangeandthereusabilitywasstable.Keywords：metal-ionimprinting;modifiedchitosan;adsorbent;removalrate0.5%Al2(SO4)3155h。。。。[1]NahumAMC,RobertoLR,etal.Adsorptionoffluoridefromwatersolutiononbonechar[J].Industrial&EngineeringChemistryResearch,2007,46(26):9205-9212.[2]MjengeraH,MkongoG.ApproprioatedeflouridationtechnologyforuseinflouroticareasinTanzania[J].PhysicsandChemistryoftheEarth,2003,28:1097-1104.[3],,.Al2O3[J].:,2007,26(1):32-35.[4].[J].,2004,3(2):60-63.[5],,.[J].,2006,28(1):1-4.[6],.[J].IM&P,2000,4:1-3.[7]SrimuraliM,PragathiA,KarthikcyanJ.AStudyonremovaloffluoridesdrinkingwaterbyadsorptionontolow-costmaterials[J].EnvironmentalPollution,1998,99:285-289.[8],,,.[J].,2009,31(2):40-44.[9].[J].,2007,32(1):46-52.[10],,.[J].,2005,12(6):12-16.STUDYONIMPROVEMNETOFHARDNESSANDREGANARATIONPERFORMANCEOFMODIFIEDCLAYDEFLUORINATINGAGENTChenTao,SunChengxun,YangXiaoying,ZhuBaoyu（JilinProvinceElectricPowerResearchInstitute,Changchun130021,China）Abstract:Thehardnessofclaydefluorinatingagentwasusuallypoor,therefore,thebinderAwasemployedtoimprovehardnessofthehomemademodifiedclaydefluorinatingagentinthispaper.Theresultsoforthogonalexperimentindicatedthatthehardnessofdefluorinatingagentwasimprovedsignificantlyunderthebestcondition,andtheadsorptioncapacityofthedefluorinatingagentafterimprovementofhardnesswasstill92.8%ofthedefluorinatingagentbeforeimprovementofhardness.Inregenarationexperiment,Al2(SO4)3waschoseasthebestregenerationsolutionbycomparingNaOH,H2SO4andAl2(SO4)3solution.Thebestregenerationconditionwasthatthesaturateddefluorinatingagentmixed0.5%ofAl2(SO4)3atratioof1:5soakingfor5h,theregenerationefficiencyofdefluorinatingagentcouldreached99.8%,andthedefluorinatingagentstillhadgoodadsorptioncapacityafterregenerationfor6times.Keywords：modifiedclay;defluorinatingagent;imporvementofhardness;reganaration3637940