天然沸石改性及其吸附除氟性能研究.pdf

1、獨(dú)創(chuàng)性聲明本人聲明所呈的學(xué)位論文是本人在導(dǎo)師指導(dǎo)下進(jìn)行的研究工作及取得的研究成果。據(jù)我所知，除了文中特別加以標(biāo)注和致謝的地方外，論文中不包含其他人已經(jīng)發(fā)表或撰寫過的研究成果，也不包含為獲得安徽農(nóng)業(yè)大學(xué)或其他教育機(jī)構(gòu)的學(xué)位或證書而使用過的材料。與我一同工作的同志對(duì)本研究所做的任何貢獻(xiàn)均已在論文中作了明確的說明并表示謝意。學(xué)位論文作者簽名：毯塵!簽字日期：如肄年6月斗日學(xué)位論文版權(quán)使用授權(quán)書本學(xué)位論文作者完全了解安徽農(nóng)業(yè)大學(xué)有關(guān)保留、使用學(xué)

2、位論文的規(guī)定，有權(quán)保留并向國(guó)家有關(guān)部門或機(jī)構(gòu)送交論文的復(fù)印件和電子文件，允許論文被查閱和借閱。本人授權(quán)安徽農(nóng)業(yè)大學(xué)可以將學(xué)位論文的全部或部分內(nèi)容編入有關(guān)數(shù)據(jù)庫(kù)進(jìn)行檢索，收錄到《中國(guó)學(xué)位論文全文數(shù)據(jù)庫(kù)》，可以采用影印、縮印或掃描等復(fù)制手段保存、匯編學(xué)位論文，向社會(huì)公眾提供信息服務(wù)。(保密的學(xué)位論文在解密后適用本授權(quán)書)。學(xué)位論文作者簽名：巡簽字目期：2014年6月斗日學(xué)位論文作者畢業(yè)后去向：工作單位：通信地址：指導(dǎo)教師簽名：簽字日期：如l

3、午琢’虧V后FL日，_口電話：郵編：AbstractTraceamountoffluorideiSindispensabilitytohumanbutanexeessofintakeoffluorideisharmfultohumanbodyInChina，thepermissiblelimitoffluorideindrinkingwaterisbetween05and10m∥L，andthefluorideremovaltreatm

4、entisnecessarywhenmorethanthestandardAmongsometreatmenttechnologies，adsorptionbecauseofitssimplicityofoperation，costeffectiveness，selectivityhighefficiencyandtheavailabilityofawiderangeofadsorbents，isstilloneofthemostext

5、ensivelyusedmethodsforthefluorideremovalfromwaterZeoliteisakindofnormaladsorberTheadsorptioncapacityofnaturalzeoliteislOWSOitmustbeactivatedinordertOattainahigheradsorptioncapacityOnthiscondition，astudyonmodificationofna

6、turalzeoliteanditsdefluorinationabilitywascarriedoutNaturalzeolitewasmodifiedwithacid，alkali，saltsolution，respectivelyDefluorinati—onabilityofmodifiedzeolitewasstudiedwithadsorptionexperiments，andoptimalmodificationcondi

7、tionwaspresentedAseriesofbatchsorptionexperimentswereconductedtostudytheinfluenceofvariousfactorssuchaspH，adsorbentdose，initialfluorideconcentration，temperature，equilibriumcontacttimeandCOexistinganionsonthesorptionofflu

8、orideAccordingtotheSEM，BETXRFFTIRandXRDanalysis，theadsorptionmechanismofthemodifiedzeoliteswerepreliminarystudiedTheresultsshowedthattheeffectoffluorideremovalofnaturalzeolitemodifiedbyferricchloridehasimprovedsignifican

9、tlyAfterimmersionfor24hwith10％ferricchloridesolutioninl：lratiocantotreatmentthewaterwithfluorideconcentrationof2mg／Lstandardswhentheamountof59／150mlandreactiongtimeis5hTheadsorptionoffluoridewasfollowedpseudo—secondorder

10、kineticsTheadsorptionrateincreasedwiththetemperatureincreasedfirstandthendecreasedIntherawwaterfluorideconcentrationislessthan20mg／g，theequilibriumadsorptiondatafiredwelltoLangmuiradsorptionisothermandshowingmaximumfluor

11、ideadsorptioncapacityofO091mg／gcomparedtotheunmodifiedzeoliteisgreatlyimprovedandequilibriumconstantofO28L／mgAtlowconcentrationsoffluoride，thehigherthetemperature，thehigherthesaturatedadsorptioncapacityIntherawwaterfluor

12、ideconcentrationismorethan20mg／g，theequilibriumadsorptiondatafittedwelltoFreundlichadsorptionisothermWhenthedosageof89，theadsorptioncapacityisthelargestIntherangeofdrinkingwater，pHhaslittleinfluencetoflurideremovaleffect