赤泥除氟剂的物相组成及其除氟性能李德贵

112Vol．11No．220172ChineseJournalofEnvironmentalEngineeringFeb．20172014AA01018YB20143862015－10－062016－03－221982—。[e-mail]*[e-mail]*533000。Na2SiO3、CaO3mm。X-、、。800℃。700℃2h190.13mg·L－10.94mg·g－199%。X705A1673-9108201702-1159-05DOI10.12030/j．cjee．201510014PhasecompositionandfluorideremovalperformanceofredmuddefluoridatorLIDeguiQINMingHEBing*DENGPingpingSchoolofMaterialsScienceandEngineeringBaiseUniversityBaise533000ChinaAbstractＲedmudhasagoodadsorptionperformancebecauseofitsporousstructureandlargespecificsurfacearea．Sphericalparticleswithdiametersofapproximately3mmwerepreparedusingredmudasthemainrawma-terialandbyaddingNa2SiO3·9H2OCaOandcarbonpowderassupplements．ThephasecompositionandtransformationofaredmuddefluoridatorwereanalyzedusingdifferentialthermalanalysisandX-raypowderdif-fractiontechniquesduringthecalcinationprocess．Severalfactorsinfluencingthefluorideremovalperformancewerealsostudiedincludingadsorptiontimecalcinationtimeandcalcinationtemperature．Theresultsshowedthatthephasetransformationoftheredmuddefluoridatormainlyoccurredattemperaturesbelow800℃duringtheprocessofcalcination．Whenusingthedefluoridatorswiththebestfluorideremovalperformancewhichwerepreparedatacalcinationtemperatureof700℃andacalcinationtimeof2htheconcentrationoffluorideionscouldbedecreasedfrom19to0.13mg·L－1inthesolutionandtheadsorptioncapacitycouldreach0.94mg·g－1．Keywordsredmudfluorideremovalagentadsorptionperformancephasecomposition。、、、1。2。34、5、6、7、8、910。1112。、、1113。SHIAO1420%PO3－410min50mg·L－1PO3－450%120min72%。。15Cr6+800℃Cr6+100g·L－1、180min、pH=9Cr6+97.63%。。11.1SmartLab9X-PXS-215HCT-3AＲ224CNDZF-605079-2SX2-8-10。NaFCaONa2SiO3·9H2OC。1.2、16∶2∶1∶1、3mm100℃72h。X-XＲD。XＲD。PF-1、、、。2g100mL、19mg·L－1pH6。、。1-Fig．1TG-DTAcurvesofredmuddefluoridator22.1HCT-320℃·min－1。-1。1800℃TG800℃。DTA300、560760℃。。061122.2XＲDSmartLab9X-X-CuKα40kV160mA10°～90°0.02°/2s/。2XＲDFig．2XＲDpatternsofredmudandredmuddefluoridator2.2.1100℃、200℃XＲD2。2XＲDα-Fe2O3、CaCO3、Ca3Al2SiO4OH8、AlOOH、Na8Al6Si6O24CO3H2O2AlOH3、FeOOH。Na2SiO3·9H2OCaO100℃C。200℃AlOH3、C、。2.2.2300、500600℃2hXＲD3。700、8001100℃2hXＲD4。3300、500600℃XＲDFig．3XＲDpatternsofredmuddefluoridatorcalcinationat300℃500℃600℃respectively4700、8001100℃XＲDFig．4XＲDpatternsofredmuddefluoridatorcalcinationat700℃800℃1100℃respectively34。300℃、、、、。AlOH3FeOOH1DTA300℃C、Ca3Al2SiO4OH8AlOOH。500℃Ca3Al2SiO4OH8AlOOH。600℃Ca3Al2SiO4OH81DTA560℃CaCO3。700℃α-Fe2O3、CaCO3Na8Al6Si6O24CO3H2O2Ca3Al2SiO4OH8161111Ca3Al2SiO41.65OH5.4。800℃Na8Al6Si6O24OH2H2O2、CaCO3Ca3Al2SiO41.65OH5.4Ca2AlAlSiO71DTA760℃。1100℃Ca2AlAlSiO7、α-Fe2O3、NaAlSiO4Ca3Fe2Si1.58Ti1.42O12。5Fig．5Influencecurvesofadsorptiontimeonfluorideremovalperformances2.3700℃2h5。520min30min19mg·L－10.13mg·L－10.94mg·g－199%。2.4200、300、400、500、600、700、800、900、10001100℃2h6Fig．6Influencecurvesofcalcinationstemperatureonfluorideremovalperformances6。6。300700℃。300℃、、、、。19mg·L－10.28mg·L－1400℃1.17mg·L－1。700℃、、、7Fig．7Influencecurvesofcalcinationstimeonfluorideremovalperformances0.13mg·L－199%。。XＲDAlOH3、FeOOH、AlOOH、Ca3Al2SiO4OH8、Na8Al6Si6O24CO3H2O2、Ca-CO3C、。Ca2AlAlSiO7、NaAlSiO4Ca3Fe2Si1.58Ti1.42O12。2.5700℃0.5、1、1.5、2、2.5、34h7。726112。2h。、。3、、、、、。。700℃α-Fe2O3、CaCO3、Na8Al6Si6O24CO3H2O2Ca3Al2SiO41.65OH5.4。700℃、2h。19mg·L－10.13mg·L－10.94mg·g－199%30min。1．J．2006252222-2242．J．2015941823-18303．J．201036710-134．J．200735206207-62085．J．20114251482-14886．J．201030655-587．J．20118100-1038．J．2003410-139．J．200933564-56810SUNDAＲAMCSMEENAKSHIS．Fluoridesorptionusingorganic-inorganichybridtypeionexchangersJ．JournalofColloidandInterfaceScience2009333158-6211．J．20099S1459-46412．J．20126113981-398813．J．201010S1264-27014SHIAOSJAKASHIK．PhosphateremovalfromaqueoussolutionfromactivatedredmudJ．JournalWaterPollutionCon-trolFederation1977492280-28515．CrVIJ．2013383673-6783611