反相气相色谱法研究CPC_膨润土对VOCs的吸附作用

:025322468(2003)0420488206:X132:ACPC2VOCs,3,(,310028):20VOCsCPC2.,CPC2VOCs,,.,CPC2VOCs,;VOCs,VOCs.:;;;StudyonsorptioncharacterizationofVOCsontoCPC2bentonitebyinversegaschromatographyTIANSenlin,ZHULizhong,SHIYao(CollegeofEnvironmentalandResourceSciences,ZhejiangUniversity,Hangzhou310028,China)Abstract:Sorptionpropertiesandenthalpiesof20VOCsontoCPC2organobentonitewerestudiedbyinversegaschromatography.CPC2bentoniteshowedstrongselectivitytowardVOCs,anditssorptioncapacitydependedonphysicochemicalpropertiesofVOCs,suchasmolecularweight,structure,andsaturatedvaporpressure.ThesorptionabilitiesofBTEX,estersandketoneswithgreatermolecularweightstoCPC2bentoniteweregreaterthantheothers.Thesorptionpropertieswereobviouslyinfluencedbytemperature.ThesorptionenthalpiesofVOCsontoCPC2bentoniteweresimilarfoheatingofevaporation,butsmallerthanthatofcommonadsorbents.Keywords:organobentonite;sorption;volatileorganiccompounds;inversegaschromatography:2002207205;:2002209204:(29777005);(863)(2002AA302305):(1975),,3,,.,[1].,,(VOCs),[26].,,.,(CetylPyridiniumChloride,CPC),VOCsVOCs,VOCs,.,.,23420037ACTASCIENTIAECIRCUMSTANTIAEVol.23,No.4Jul.,2003©1994-2008ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.,,.[7].[7],(),:Q=(maAc)P(WS)(1),ma(mol),Q(molPg),W(g),S(mVmin),Ac=h0(tc-t0)dh,t0(min),h(mV),tc(min).:C=(mah)P(WjF0)(2),C(molPmL),F0(mLPmin),j=3[(PiPP0)2-1]P(PiPP0)3-1],Pi(Pa),P0(Pa)..:lnVg=-HaPRT+(3),Vg(mLPg),Ha(JPmol),T(K),R,81314JK-1mol-1.lnVg1PT,Ha.111120,,100102meqP100g().[5].GC214B,FID,2m4mm(I1D.),(991999%),,,1510L().112IGC(1),CPC2,,105,,,.(2)200kPa,,,.(3),,(35),50Hz,,(1)(2),,.,5%.2211,720.,Q(molPg)C(molPmL),HenryFreundlich,9844:CPC2VOCs©1994-2008ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.,KH.(1)1VOCs80VOCsCPC2KHKFn.,,,;.1VOCsCPC2VOCs3Table1PhysicochemicalconstantsofVOCsandisothermequationsofVOCsonCPC2bentoniteVOC,gPmol,K,kJPmol,kPaHenryQ=KHCKHR2FreundilichQ=KFC1PnKFnR278.114353.2430.75100.13103.90.9987127.11.00.998392.141383.7833.5938.61168.80.9988178.21.00.9981106.167409.3535.9116.70290.50.9990413.01.00.9978106.167411.5135.9215.70281.50.9989387.51.00.9979106.167412.2736.3315.05358.20.9988458.61.00.9974106.167417.5837.0012.56394.40.9991886.11.00.997184.932312.9028.38351.5193.40.9964124.71.00.9959119.377334.3329.79182.81114.70.996688.11.20.9977153.822349.7929.8420.1937.90.997362.11.00.9966165.833394.4034.3427.30109.90.9990162.31.00.997984.161353.8729.8998.5720.90.997811.31.10.999586.177341.8829.11140.2510.30.99716.31.00.9989100.204371.5831.7319.7022.20.997812.81.00.9986114.231398.8334.7722.9856.70.999021.91.10.9402114.231372.3931.0256.5622.80.997326.91.00.9984116.16399.1536.5121.43217.20.9986307.71.00.997988.106350.2132.23110.4064.30.997339.71.00.998674.123307.5827.09394.327.90.99630.91.20.997658.08329.4429.79214.3669.40.996151.51.00.9973100.161389.6535.8229.66183.80.9983608.70.90.99473[8]..180CPC2,(),CPC2,,,:.8052.,:,,;,;,;,,,.09423©1994-2008ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.:,,,;1,,,,.(2),,HenryFreundlich2.2,,CPC2,.,,:K(mLPg)=Vg(mLPg),(3)[9],.2Table2IsothermsofVOCsatvarioustemperaturesVOCs,HennryFreundlichKHR2KFnR2VOCs,HennryFreundlichKHR2KFnR23078.60.990730.91.10.996830266.40.9939211.41.00.99564054.90.994426.71.10.998140177.50.9972136.51.00.99786038.90.997927.31.00.998660109.60.9989101.41.00.99678022.20.997812.81.00.99868056.70.999021.91.10.940210013.10.99818.41.00.999110031.60.999117.71.10.99724038.40.992217.61.10.99674054.70.99256.51.10.99886035.00.997424.31.00.99856039.00.996712.91.00.99928020.90.997811.31.10.99958022.80.997326.91.00.998410013.20.99806.11.10.999610013.70.997713.11.10.99803028.00.98796.41.10.997460195.60.9982284.41.00.99734020.80.99226.51.10.998580103.90.9987127.11.00.99836016.50.99659.01.10.998710059.20.998978.51.00.99858010.30.99716.31.00.99891006.60.99752.11.10.99951944:CPC2VOCs©1994-2008ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.,,,(3).(1)3.,,,,,.,,.3VOCsCPC23Table3DifferentialenthalpiesofsorptionofVOCsonCPC2bentoniteVOCs,K,kJPmol-Ha,kJPmolVOCs,K,kJPmol-Ha,kJPmol353.2430.7529.59353.8729.8922.63383.7833.5931.55341.8829.1122.01409.3535.9132.88371.5831.7327.35411.5135.9233.19398.8334.7732.67412.2736.3335.47372.3931.0225.92417.5837.0035.08399.1536.5137.77312.9028.3831.49350.2132.2329.95334.3329.7930.32307.5827.0914.59349.7929.8423.13329.4429.7930.86394.4034.3430.26389.6535.8234.193[8](2)34CPC2([9,10]).,,Al2O3Al2O3,.,.[5],,,.,3Fig.3Sorptionenthalpyofbenzeneontovarioussorbents4VOCsCPC2Fig.4SorptionenthalpyofvariousVOCsontoCPC2bentoniteandactivatedcarbon29423©1994-2008ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.,,,,CPC2,.43Table4SorptionconstantsofvariousVOCsrelativetobenzeneVOCsKR3.83.42.82.72.11.81.61.11.11.0VOCsKR0.90.70.60.50.40.20.20.20.10.13KRK.3(1),,.(2),,.(3),,.:[1].[J].,1998,6(3):53