改性灰岩除氟的实验研究郭朝斌

8[1]0.5~1.0mg/L[2]。1.5mg/L[3]。4.5mg/L[4]6.0mg/L20mg/L[5]。。[6]。、。、、、、、[7-10]。[11]。[12]、。pH[13]。。FeCl3、、FeCl3、《》2010[e-mail]*、[e-mail]。EnvironmentalScience&Technology34820118Vol.34No.8Aug.2011.[J].,2011,34(8)89-94.GuoChao-binSunTing-tingZhengYan-songetal.Fluorideremovalbymodifiedlimestone[J].EnvironmentalScience&Technology,2011,34(8)89-94.*100083。FeCl3FeCl3。5mg/L0.2~0.5mm1g0.016mmol/L95.74%。FeCl3FeCl3。X830Adoi10.3969/j.issn.1003-6504.2011.08.0201003-6504(2011)08-0089-06FluorideRemovalbyModifiedLimestoneGUOChao-binSUNTing-tingZHENGYan-songMAZi-qiangBAILuWUGui-songLIUQiongGUOHua-ming*SchoolofWaterResourceandEnvironmentChinaUniversityofGeosciencesBeijing100083ChinaAbstractModifiedlimestoneisusedasadsorbentfordefluoridation.BatchandcolumnexperimentsweredonetoinvestigateF-removalbymodifiedmaterialsunderdifferentconditions.ResultsshowedthatthesystemofferricchlorideandlimestonehasagoodcapacityforF-removalfromaqueoussolutionwiththetreatedwatersatisfactorytonationaldrinkingwaterstandards.AdditionofFeCl3enhancesF-removalbylimestone.Theremovalefficiencyisupto95.74%inthebatchwithinitialF-concentrationof5.0mg/Llimestonegrainsizeof0.2~0.5mmdosageof20g/LandFeCl3concentrationof0.016mmol/L.Columnstudyshowedthattheremovalefficiencyincreasedwithincreaseinthevolumeofwatertreated.ElevatedFeCl3concentrationleadstothehigheradsorptionefficiencyincomparisonwithlowFeCl3concentrationwhichimpliesthatthemodifiedlimestonehasthepossibilityofpracticalapplication.Keywordslimestoneferricchloridessinteringcolumntestdefluorination34。FeCl3。、。、。。XRD。。11.11.1.1OrionpH/ISE4-starPB-10pHTHZ-82101-1ABSRJX—LEAD-2BSA124S。1.1.2FeCl3、NaF。1.21.2.11FeCl323FeCl3。1.2.2。125mL50mL5mg/L1.0g0.2~0.5mm。25℃60r/min。。5mg/L3cm、15cm100g0.5~1mm11.2mL/min。25±2℃。F-5mg/LFeCl30.005mol/L0.01mol/L。22.1FeCl32.1.1FeCl3FeCl35mg/L0~0.133mmol/L24h。2pHFeCl3。21gFeCl3FeCl30.016mmol/L0.133mmol/L。FeCl3FeCl30.016mmol/L。0.005mmol/L。20.106mmol/L。2.1.2FeCl35mg/LFeCl30.016mmol/L0.25~24h。3pH。31gFeCl324h0.213mg/L95.74%2.5h24h。9081gFeCl32.5h。CaF2CaCO3CaCO3[14]。pH6~7。FeCl30.016mmol/L、2.5hFeCl3。2.25g0.2~0.5mm300℃400℃1h0.2mm1g24h。1。1F-0.83mg/L83.4%pH12.5。pH12。CaCO3圯CaO+CO21CaO+H2O+2F-圯CaF2+2OH-2300℃400℃。pH。2.3FeCl3-5g0.2~0.5mm0.266mol/LFeCl324hFeCl30~25mL100~300℃0.2mm1g24h。23。1Table1ResultsofF-removalbylimestonecalcinatedatdifferenttemperatures/℃pHF-/mg·L－1/%930012.301.0379.412.520.9780.61040012.490.8383.412.510.9181.82Table2Parametersofmodifiedmaterials/mL/mL/℃/h1100100121501001320010014250100151515306151520067151520018151530013FeCl3Table3ResultsofF-removalbylimestonemodifiedatdifferenttemperaturesandFeCl3concentrationpHF-/mg·L－1/%18.865.11-2.128.694.941.238.844.657.048.814.853.059.264.833.4612.700.8283.6712.672.6347.5812.690.7784.6913431～4100℃1hFeCl3FeCl31h100℃200℃300℃。200℃6h1h2300℃0.77mg/L84.6%。FeCl324h。1~56~8pH。。1385%pH12.5FeCl3。2.4FeCl35mg/LFeCl30.005mol/L。4pH。42.03mg/L60%pH7.8。FeCl30.005mol/L。5mg/LFeCl30.01mol/L。5pH。51mg/L0.880mg/L82.40%pH7.0。FeCl30.01mol/L。。2.5XRD6。FeOOHFeOH3XRD7。928FeCl31324。Ca2++2F-圯CaF23≡Fe(OH)+H++F-圯≡FeF+H2O4。2FeCl3pHFeCl35Fe3++3H2O圳Fe(OH)3+H+531FeCl35mg/L0.2~0.5mm1g0.016mmol/L95.74%。2FeCl3200℃6h300℃1h85%。3FeCl3FeCl3。[][1].[J].200629(7)87-89.WeiDong-shengZhangMei-lingChengHui-tingetal.Removalconditionsofcalciumaluminumfluorideions[J].EnvironmentalScience&Technology200629(7)87-89.inChinese[2].[J].200524315-18.HuLi-juanZhouQi.Astudyonremovaloffluoridefromdrinkingwaterbymodifiedzeoliteprocess[J].WaterPurifica－tionTechnology200524315-18.inChinese[3].[J].2009(6)29-31.WangYun-boLiJuanAnPeng.Researchonactivationmethodsandmechanismofzeoliteusedtoremovefluorin[J].WaterScienceandEngineeringTechnology,2009(6)29-31.inChinese[4].[J].2009223.YinFang-pingWangTian-dong.Modifiedactivatedalu－minaandsodiumhydroxidefluorideremovalefficiencyofthedynamic[J].JournalofSuzhouInstituteofTechnology2009223.inChinese[5].—[J].()200322612-14.XiaoJu-qiangLuanHongYanGang.Newfluoridema－terials-magnesium-activatedzeolite[J].LanzhouRailwayInstituteTechnology(NaturalScience)200322612-14.inChinese[6].—[J].200313580-81.LiShui-yan.Newdrinkingwaterfluorideremovalmaterial-activatedzeolitefluorideremoval[J].InformationDevelop－mentandEconomy200313580-81.inChinese[7]SrimuraliMPragathiAKarthikeyanJ.Astudyonre－movaloffluoridesfromdrinkingwaterbyadsorptionontolow-costmaterials[J].EnvironPollut199899285-289.[8].[J].1999255281-285.WangYan-xinGuoHua-ming.Usingsomeofnaturalrockmaterialtoreducefluorideintheexperimentalstudy[J].WaterTreatment1999255281-285.inChinese[9]TorA.Removaloffluoridefromanaqueoussolutionbyusingmontmorillonite[J].Desalination2006201267-276.[10].[J].200121134-38.FanLi-zhenLiaoLi-bingLuanZhao-kun.Experimentalstudyonadsorptionoffluorideionmodifiedmontmorillonite[J].MineralTechnology200121134-38.inChinese[11].[J].2008311103-108.XueJin-fengMaYan-taoYuXing-linetal.Develop－mentofmediafortreatmentofflyashfromdrinkingwateroffluoride[J].EnvironmentalScience&Technology2008311103-108.inChinese[12].[J].200130279-80.LiuXi-wenLiChu