赤泥为原料制备除氟剂的实验研究李德贵

533000Na2SiO3·9H2O、CaO、。XＲD、、、pH。700℃、1h19mg/L0．37mg/L0．47mg/g98%pH。TB321TQ115A1673－6850201412－0021－04ExperimentalStudyonFluorideＲemovalAgentfromＲedMudLIDe－guiZHONGYueCHENLiDepartmentofPhysicsandCommunicationEngineeringBaiseUniversityBaise533000ChinaAbstractＲedmudisakindofcontaminationandayieldenormouswasteinaluminapro-duction．ThefluorideremovalagentshadbeenpreparedwithBayerredmudfromPingguoAlumi-numPlantsasthemainrawmaterialbyaddingacertainamountofadditivessuchasNa2SiO3·9H2O、CaO、carbonpowderets．．ThephaseofthesampleshadbeenanalyzedbyXＲD．Andthefluorideremovalperformancesofredmudadsorbenthadbeenstudiedtoo．Severalinfluencingfac-torsofthefluorideremovalperformancehavebeenresearchedsuchastheadsorptiontimecalcina-tionstemperaturecalcinationstimepHvalueandsoon．Theresultsshowedthattheconcentra-tionoffluorineioncoulddecreasefrom19mg/Lto0．37mg/Lintheconditionofthecalcinationtemperature700℃andcalcinationtime1h．Theadsorptioncapacitycouldreach0．47mg/gandfluorineremovalratecouldreach98%．AtthesametimethefluorideremovalperformanceswereaffectedbythepreparationconditionsandpHvaluegreatly．Keywordsredmudadsorbentfluorideremovalperformance2014－07－28YB20143862011KB021982－。[e-mail]70001mg/L50051。、、、。。2－4。。。124312201412JournalofSaltandChemicalIndustryDOI:10.16570/j.cnki.issn1673-6850.2014.12.009540m2/g～70m2/g。。6、2g/L、2h、0．5h2mol/LNaOH25mL/L98．2%。7、、、、FreundlichpH。Shiao820%PO3－410min50mg/LPO3－450%2h72%。11．1NaF、CaO、Na2SiO3·9H2O、H2SO4、NH3·H2O、。SmartLabX、PXS－215、、pH、、AＲ224CN、DZF－6050、SX2－5－12、79－2。1．215∶2∶1∶1、5mm20h80℃1d。XＲD。、、pH。22．1XＲDXＲD1。α－Fe2O3、AlOOH、CaCO3、Ca3AlFeSiO4OH8、α－FeOOH、Na8Al6Si6O24OH2．04H2O2．66、CaTiO3Na2SiO3·9H2O、CaO、700℃1h、、、FeSiO3、CaO。2:AlOOH4:Ca3AlFe（SiO4）（OH）86:Na8（Al6Si6O24）（OH）2.04（H2O）2.668:Fe2SiO32θ/（°）102030405060708090ABA：赤泥原料B：除氟剂11819338887913771191111347664411334444622255311151:α-Fe2O33:CaCO35:FeOOH7:CaTiO39:CaO7141XＲDFig．1XＲDpatternsofredmudmaterialsandredmudfluorideremorvalagents2．2Na2SiO3、CaO、700℃1h。2g50mLpH6．519mg/L2h2。2。60min0．0078mg/g·min19mg/L0．37mg/L2243122014120．47mg/g98%。吸附量/（mg·g-1）500.480.460.440.420.400.380.36吸附时间/min543210氟浓度/（mg·L-1）01020304060708090100110120吸附量氟浓度2Fig．2Curvegraphoffluoridesolubilityandadsorptionversustime2．37200℃、300℃、400℃、500℃、600℃、700℃、800℃1h2g50mLpH6．519mg/L1h3。吸附容量氟浓度氟浓度/（mg·L-1）吸附容量/（mg·g-1）0焙烧温度/℃0.480.460.440.420.400.380.360.3465432101002003004005006007008003Fig．3Curveofcalcinationtemperatureonfluorideremovalperformance3700℃。700℃。700℃19mg/L0．37mg/L0．47mg/g1/1438%。700℃、、、、、、。700℃。2．47400℃0．5h、1h、2h、3h、4h、6h2g50mL、pH6．5、19mg/L。1h4。氟浓度/（mg·L-1）吸附容量/（mg·g-1）焙烧时间/h00.480.460.440.420.400.380.360.340.321234565.55.04.54.03.53.02.52.01.51.00.50.0吸附容量氟浓度4Fig．4Curveofcalcinationtimeonfluorideremovalperformance4400℃4h19mg/L0．42mg/L0．46mg/g。。2．5pH400℃2h。2g50mLpH4．82、5．44、6．37、7．65、8．4319mg/L1h。5。5pHpH。pH4．5219mg/L32氟浓度/（mg·L-1）吸附容量/（mg·g-1）pH值4.00.500.450.400.350.300.254.55.05.56.06.57.07.58.08.59.09876543210-1吸附容量氟浓度5pHFig．5CurveofpHonfluorideremovalperformance0．018mg/L0．47mg/gpH6．370．29mg/LpH7pH8．438．29mg/L0．26mg/g。31、、、、、、、、、、。260min。700℃1h19mg/L0．37mg/L0．47mg/g。3、pH。1h700℃400℃4hpHpH7。1．J．2009387472－474．2．J．2010101264－270．3．J．20103238－12．4．J．2008143－48．5LiuWanchaoYangJiakuanXiaoBo．ApplicationofBayerredmudforironrecoveryandbuildingmaterialproductionfromalumo-silicateresiduesJ．J．Hazard．Mater．20091611474－481．6．J．200925320－2227．7．J．200840847－49．8ShiaoS．J．WaterPolluteJ．ControlFed．1977492280－285．2015《》《》《》1972。、、。、、。、、、、。165616．006－34BM4144。ISSN1673－6850CN12－1388/TS。831300450/[e-mail][e-mail]1201074000030424312201412