PAAcoAMPSDME省略的制备及其对Cd2的吸附行为龚伟

303011201811ChemicalＲesearchandApplicationVol．30No．11Nov．20181004-1656201811-1804-08PAA-co-AMPS/DMECd2+1212*11121．7260002．610041PAA-co-AMPS/DMEFT-IＲ、TGASEMPAA-co-AMPS/DMECd2+。DMEPAA-co-AMPSPAA-co-AMPSDME。pH=5.0、80min、Cd2+0.01mol·L－1PAA-co-AMPS/DME0.10gCd2+369.4mg·g－1Langmuir。DMEPAA-co-AMPSCd2+。O632.52ASynthesisofpolyAA-co-AMPS/diatomitecompositeanditsapplicationintheadsorptionbehaviorofCd2+GONGWei12LIMei-lan12*LEIXiao-fei1LIANGTong1WANGXing1LIUBai-ling21．ShangluoUniversityShangluo726000China2．ChengduInstituteofOrganicChemistryChineseAcademyofSciencesChengdu610041ChinaAbstractBasedonin-situpolymerizationinthepaperthePAA-co-AMPS/DMEcompositeswereprepared．AndFT-IＲTGAandSEMwereemployedtocharacterizetheirstructure．MoreovertheadsorptionbehaviorofCd2+byPAA-co-AMPS/DMEcom-positeswasstudiedalso．TheresultswerethattheDMEhasbeengraftedontothenetworkofPAA-co-AMPSandthecompositeswithbetterheatstabilitywasobtained．AndcomparedtothePAA-co-AMPSmaterialduetotheadditionofDMEPAA-co-AMPS/DMEcompositehadlargerspecificsurfaceareaandadsorptionsites．IntheadsorptionexperimentundertheconditionsofpH=5.0contacttimeof80minaninitialCd2+concentrationof0.01mol·L－1andanamountofPAA-co-AMPS/DMEcompos-iteof0.10gtheadsorbentcapacityofPAA-co-AMPS/DMEcompositeforCd2+wasfoundtobe369.4mg·g－1andtheadsorp-tionsystemreachedequilibrium．TheadsorptionofCd2+conformedLangmuirisothermaladsorptionmodel．ComparedwithDMEandPAA-co-AMPSreportedtheas-preparedcompositeadsorbenthadahigheradsorptioncapacityofCd2+.2018-04-172018-07-24SK2016-461988—。[e-mail]。11PAA-co-AMPS/DMECd2+KeywordsCompositesCadmiumionAdsorptionbehaviorStructure＆propertiesDiatomite12。、3-5。、、、、-、、6-19。、。、、、。、、20-2324-30。。、、-31-33。2--2-PAA-co-AMPS/DMEPAA-co-AMPS/DMECd2+、。11.1AA2--2-AMPSKPSNN-MBADMEEDTA。1.2PAA-co-AMPS/DME0.074mm24h。2--2-2--2-31。250mL1.5hNN-88℃。3.0h。110℃PAA-co-AMPS/DME120。1.3Cd2+Cd2+100mLDME、PAA-co-AMPSPAA-co-AMPS/DME25℃3000γ/min30min。Cd2+。Cd2+ED-TA。Cd2+qe=C0－Ce×V/m508130qeCd2+mg·g－1C0Cd2+mg·L－1CeCd2+mg·L－1VCd2+mLmmg1.3.10.1g0.001gDME、PAA-co-AMPSPAA-co-AMPS/DME250mL100mL0.01mol·L－1Cd2+25℃10、20、30、40、50、60、80、100、120、150、180minCd2+Cd2+。1.3.2pH0.1g0.001gDME、PAA-co-AMPSPAA-co-AMPS/DME250mL100mL0.01mol·L－1Cd2+pH2.0、3.0、4.0、5.0、5.5、6.025℃80minCd2+Cd2+。1.3.3Cd2+0.001、0.002、0.005、0.008、0.01、0.020.03mol·L－1100mL0.1gPAA-co-AMPS/DME25℃80minCd2+。1.4MadisonNicolet-170SXKBr1100、500～4000cm－14cm－132PHILIPXL-30XL30S-FEGSEM3.5nm15～200000。22.1PAA-co-AMPS/DME2.1.1PAA-co-AMPS/DMEPAA-co-AMPS/DMEPAA-co-AMPS/DME1。PAA-co-AMPS/DME1156cm－1—SO3H1455cm－1-CONH-2927cm－11650cm－1C=CAMPSAA。1032cm－1526cm-1Si—O—SiSi—O—ＲPAA-co-AMPSDME。DME3631cm－1DMEPAA-co-AMPS。1DME、PAA-co-AMPSPAA-co-AMPS/DMEFig．1TheFT-IＲspectraofDMEPAA-co-AMPSandPAA-co-AMPS/DMEcomposites2.1.2PAA-co-AMPSPAA-co-AMPS/DME2。2PAA-co-AMPS/DMEPAA-co-AMPS。608111PAA-co-AMPS/DMECd2+100℃PAA-co-AMPS/DMEPAA-co-AMPSDME。500℃PAA-co-AMPS70%PAA-co-AMPS/DME45%DME。2--2-PAA-co-2PAA-co-AMPSPAA-co-AMPS/DMEFig．2TheTGcurveofPAA-co-AMPSandPAA-co-AMPS/DMEcompositesAMPS/DME。PAA-co-AMPS/DME。2.1.3SEM。PAA-co-AMPSPAA-co-AMPS/DME3。3PAA-co-AMPSPAA-co-AMPS/DMEDMEPAA-co-AMPSDMEPAA-co-AMPS。DMEPAA-co-AMPS/DMEPAA-co-AMPS/DME。3PAA-co-AMPSPAA-co-AMPS/DMESEMFig．3TheSEMimagesofPAA-co-AMPSandPAA-co-AMPS/DMEcomposites2.2Cd2+2.2.1Cd2+Cd2+pH=5.0、0.1gCd2+0.01mol·L－1DME、PAA-co-AMPSPAA-co-AMPS/DMECd2+4。DMECd2+50min60min708130。PAA-co-AMPSPAA-co-AMPS/DMECd2+80minDMEPAA-co-AMPSPAA-co-AMPS/DMECd2+。4DME、PAA-co-AMPSPAA-co-AMPS/DMECd2+Fig．4EffectsofcontacttimeonCd2+adsorptionbyDMEPAA-co-AMPSandPAA-co-AMPS/DMEcompositesDMEPAA-co-AMPS/DEMCd2+PAA-co-AMPS/DMEAA、AMPS、、、Cd2+Cd2+PAA-co-AMPSDMEPAA-co-AMPS/DME。AA-co-AMPS/DMECd2+。2.2.2Cd2+Cd2+pH=5.0、0.1g、80minCd2+0.01mol·L－1PAA-co-AMPS/DMEDMECd2+5。DMECd2+DME4.8%DMECd2+DMECd2+。PAA-AMPS/DMECd2+Cd2+PAA-AMPS/DME。PAA-AMPS/DMEDMEPAA-co-AMPS/DMEDME。PAA-AMPS/DMEDMEDMEPAA-AMPS/DMECd2+。5DMEPAA-co-AMPS/DMECd2+Fig．5EffectsofDMEcontentonCd2+adsorptionbyPAA-co-AMPS/DMEcomposites2.2.3pHCd2+pHCd2+。Cd2+pHPAA-co-AMPS/DME808111PAA-co-AMPS/DMECd2+6pHDMEPAA-co-AMPS/DMECd2+Fig．6EffectsofpHonCd2+adsorptionbyDMEandPAA-co-AMPS/DMEcompositesCd2+6。6Cd2+pHPAA-co-AMPS/DMECd2+。pHH+PAA-co-AMPS/DME-COOH-SO3HPAA-co-AMPS/DME-COOH-SO3HCd2+H+Cd2+PAA-co-AMPS/DMECd2+。Cd2+pHPAA-co-AMPS/DMECd2+Cd2+。PAA-co-AMPS/DMECd2+。pH5.0PAA-co-AMPS/DMECd2+。Cd2+pHPAA-co-AMPS/DMECd2+Cd2+Cd2+Cd2+。pH＞6.0Cd2+。2.2.4PAA-co-AMPS/DMECd2+PAA-co-AMPS/DMECd2+7。Cd2+Cd2+PAA-co-AMPS/DMECd2+PAA-co-AMPS/DMEAA、AMPSCd2+、、Cd2+Cd2+。PAA-co-AMPS/DMECd2+Cd2+PAA-co-AMPS/DMECd2+Cd2+PAA-co-AMPS/DMECd2+。7PAA-co-AMPS/DMECd2+Fig．7DifferentisothermmodelsfitforCd2+adsorptionbyPAA-co-AMPS/DMEcompositesLangmuirFreundlich7。PAA-co-AMPS/DMECd2+Langmuir908130。LangmuirLangmuirKL1。1PAA-co-AMPS/DMELangmuirKL＜1PAA-co-AMPS/DMECd2+。LangmuirFreundlichＲ2LangmuirPAA-co-AMPS/DMEPAA-co-AMPS/DMECd2+。1PAA-co-AMPS/DMETable1AdsorptionisothermparametersofPAA-co-AMPS/DMEcompositesLangmuirFreundlichQmaxmg·g－1KL*103L·mg－1Ｒ2KF1/nＲ2403.6685.620.9879846.6720.27150.8540731PAA-co-AMPS/DMEFT-IＲ、TGASEM。PAA-co-AMPSDMEDMEPAA-co-AMPS/DME。2PAA-co-AMPS/DMECd2+PAA-co-AMPS/DMEC