沸石改性及其去除水中氨氮的实验研究佟小薇

3　4环境工程学报Vol.3,No.420094ChineseJournalofEnvironmentalEngineeringApr.2009佟小薇1　朱义年1,2＊(1.,541004;2.,541004)　　。,。NaOH1mol/L,650.68mg/kg,2.82。,NaCl,KClCaCl2。NaCl,,3～4;NaCl150g/L18h,887.35mg/kg,3.84。　　　　　X52;X703　　　A　　　1673-9108(2009)04-0635-04ExperimentalstudyonthemodificationofnaturalstelleriteanditsremovalofammonianitrogenfromwaterTongXiaowei1　ZhuYinian1,2(1.DepartmentofResourcesandEnvironmentalEngineering,GuilinUniversityofTechnology,Guilin541004;2.TheGuangxiKeyLaboratoryofEnvironmentalEngineering,ProtectionandAssessment,Guilin541004)Abstract　Naturalstelleritewasexperimentallymodifiedtoimproveitsadsorptionremovalcapacityforam-monianitrogen.Theresultsindicatethatthemodificationbyheatingandacidscouldnotsignificantlyincreasetheadsorptioncapacityofthemodifiedstelleriteforammonianitrogen.Thestelleritethatwasmodifiedby1mol/LNaOHhadtheadsorptioncapacityforammonianitrogenupto650.68mg/kg,whichwas2.82timesthatoftheunmodifiedstellerite.Forthemodificationbyinorganicsalts,NaClhadthebestmodificationeffectandfollowedbyKClandCaCl2.AstheincreasingNaClconcentrationandmodificationtime,theadsorptioncapacityforam-monianitrogenincreasedobviously.Aftermodificationwith150g/LNaClfor18h,itsadsorptioncapacityforammonianitrogenreached887.35mg/kg,whichwas3.84timesashighasthatofthenaturalstellerite.Keywords　stellerite;modification;adsorption;ammonianitrogen:(0833020,0575103);“”(2004217);“”([2007]71):2008-08-14;:2008-08-28:(1980～),,,。＊,E-mail:[e-mail]　　,、、,。,、。,80[1],、、、、、。、,[2]、[3,4]、[5]、[6]、[7]。,,。1　1.1　,、。,。31.2　(UPW-40NE,);(KDC,);(SHZ-82,);pH(pHS-3C,);(101A-2,);(FA1004,)。1.3　1.3.1　加热焙烧改性10g58～120μm,200、300、400、500700℃2h,。1.3.2　无机酸与碱改性10g58～120μm,200mL0.01、0.05、0.1、0.2、0.25、0.5、0.71mol/L、、0.1、0.2、0.4、0.6、1、1.52mol/L24h,,105℃2h,。1.3.3　无机盐改性10g,200mL200g/LNaCl、KClCaCl224h,,105℃2h,。1.3.4　吸附实验,100mL2.5g100mg/LNH4Cl25mL,6h,4000r/min10min,0.45μm,。2　2.1　、,,。1,200～400℃,,400℃,。2.2　1　Fig.1　Comparisonofammoniumadsorptionbetweennaturalandroastedstellerites,;H+,;,。2,3,,。,;,,。2　Fig.2　Effectofinorganicacidsonammoniumadsorptionbymodifiedstellerite,,;,,。3,NaOH,。NaOH0.1mol/L1mol/L,,287.67mg/kg650.686364:mg/kg,2.82;NaOH1mol/L2mol/L,。NaOH,,,;Na+,Na,。,,,;,。,,,NaOH1mol/L。3　NaOHFig.3　EffectofNaOHconcentrationonammoniumadsorptionbymodifiedstellerite2.3　,。,,,,,,。。。。0.6～1.5nm,0.3～1nm,NH+40.286nm,,,K+、Na+、Ca2+,,[8]。。NaCl。,Na+Ca2+Mg2+,,,,,[8]。4,200g/LNaCl、KClCaCl224h,3NaCl,KCl,CaCl2,4.19、3.041.53。NaCl,Na+Ca2+,。、,,,,,,NaCl。3Na-、K-Ca-,,。NH+4[9]。,,。4　Fig.4　ComparisonofammoniumadsorptionbetweennaturalstelleriteandstelleritemodifiedwithinorganicsaltNaCl,(5)。NaCl150g/L,978.26mg/kg,4.23,。NaCl,,960mg/kg。NaCl,150g/L。,NaCl(6)。18h,887.35mg/kg,63735　NaClFig.5　EffectofNaClconcentrationonammoniumadsorptionbymodifiedstellerite3.84。,。,,NaCl,18h。6　Fig.6　Effectofmodificationtimeonammoniumadsorptionbymodifiedstellerite3　　(1)200～400℃,,400℃。(2)HCl、H2SO4HNO3,,。(3)NaOH,。NaOH0.1mol/L1mol/L,287.67mg/kg650.68mg/kg;NaOH1mol/L2mol/L,。NaOH1mol/L,2.82。(4)200g/LNaCl、KClCaCl224h,NaCl,KClCaCl2,4.19、3.041.53。(5)NaCl,,3～4,。150g/LNaCl18h,887.35mg/kg,3.84。[1]RajecP.,DomianováK.Cesiumexchangereactiononnatu-ralandmodifiedclinoptilolitezeolite.JournalofRadioana-lyticalandNuclearChemistry,2008,275(3):503～508[2],,..,2005,31(8):10～13[3],..,2005,28(1):47～49[4],,,..,2007,26(1):21～26[5],,..,2006,23(3):236～239[6]MalekpourA.,MillaniM.R.,KheirkhahM.SynthesisandcharacterizationofaNaAzeolitemembraneanditsapplica-tionsfordesalinationofradioactivesolutions.Desalination,2008,225:199～208[7]ErdoganB.,SaklzcM.,YörǜkoˇullarE.Characterizationandethyleneadsorptionofnaturalandmodifiedclinoptilo-lites.AppliedSurfaceScience,2008,254:2450～2457[8],,,..,2000,22(3):69～72[9],,,.NH+4.,2006,22(1):197～199638