資源描述：
《有機污染物在氧化錳上的吸附與脫附行為分析》由會員上傳分享，免費在線閱讀，更多相關(guān)內(nèi)容在學(xué)術(shù)論文-天天文庫。
1、Studiesontheadso印tiOn—desO印tionofO唱anicPonutantsatMaganese-oxides／waterinterf．a(chǎn)ces^BSTRAcTAdsorptionanddesorptionprocesshasreceivedco八siderableattentionasoneofthemostimportantprocessesaffectingthemobility，degradationandbiologicalactivityoforganicp01lut
2、antsintheenvironment．Desorptionofmanyorganicp011utantsfromnaturalsedimentshasbeenobservedtobeirreversible．Theirreversiblebehavioraffectedtheenvironmentalqualitycriteria，remediationefficiencyandthepOtentialdangerofp011utantsinnaturalwaterbody．Inthisthes
3、is，adsorption—desorptionexperimentswereusedtoinvestigatetheadsorptiOnanddesorptionbehaviOrofmethylOrange．p—chlorophen01andH—acidontoaseriesofabsorbentincluding6Mn02(I)、6Mn02(II)和ⅡMn02．Theinfluenceofsurroundingfactors(pH、temperature、ionsintensity)toadso
4、rptionisothermsofthreeorganismswasdiscussed．Accordingtodifferenttypesofadsorbates，therearethreepartsinmydissertation：(1)theadsorptionanddesorptionofmethylorangeonII】anganeseoxides：(2)theadsorptionanddesorptionofH—acidonmanganeseoxides：(3)theadsorptiona
5、nddesorptionofp—chlorophenolonIi)anganeseoxides。Herearethemainconclusions：(1)pH—variableadsorptionisothermshavebeendeterminedatthreeconcentrationsofNaN03，i．eO．0l、O．05andO。lm01／L．Constant—pHisothermswereobtainedatpH6．OandO．Olmol／乙concentrationofNaN03．Th
6、eresultsshowedthattheadsorptioncapacityminishedalongwiththeincreaseofpHvalueandiOnsintensityinmethylorangeadsorptionsystems．TheadsorptionisOthermskepttothelawofLangmuir．Athightemperaturetheadsorptionon6Mn02(I)andⅡMn02increased，1Ⅳhilethe直塑豎塑塑壅壑些堡：!塑豎塑曼墮
7、墮塹塑塑塞．a(chǎn)dsorDtionon6MnOz(II)becamedecreased．Adsorptionanddesorptionisothermswereperformedwithdifferentabsorbateconcentrations(100，200，400mg／L)．TherewasanobviousCpeffectinmethylorangeadsorptionsysteI丁IsandtheadsorptionofmethylorangeontoMnozwas1argelyirre
8、versible(bigadsorptionhysteresis)．TheadsorptionirreversibilityincreasedwiththeincreasingofCp．CirculatiVepHscanningadsorptiondesOrptionexperimentsshowedthatachangetoa1essfavourablepHdidnotcausedesorption，whereasachangein乞heoppositedirect
