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《Se(IV)在北山花岗岩上的吸附.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、物理化学学~(WuliHuaxueXuebao12222ActaJp.一Chim.Sin.2011,27(9),2222—2226September【Article]www.whxb.pku.edu.cnSe(IV)在北山花岗岩上的吸附郭治军陈宗元吴王锁刘春立陈涛’田文宇’黎春’(北京分子科学国家实验室,放射化学与辐射化学重点学科实验室,北京大学化学与分子工程学院,北京100871;兰州大学核科学与技术学院,兰州730000)摘要:采用批式法研究了粉碎的甘肃北山花岗岩样品(BS03,600m)对Se(iV)的吸
2、附作用.实验结果表明:在pH3—7范围内,Se(iV)的吸附分配比()基本不随pH变化:当pH>7时,SedV)在北山花岗岩上的,3、山花岗岩上的吸附作用相互之间没有表观影响.通过假定HSeO~在广义的吸附位点=SOH上发生了生成-SHSeO。和三SSeO的两个表面配位反应,定量解释了Se(iV)的吸附实验结果.关键词:北山花岗岩:吸附:Se(IV);表面配位模型中图分类号:0647.32AdsorptionofSe(IV)ontoBeishanGraniteGUOZhi—Jun’一CHENZong—YuanWUWang—SuoLIUChun—Li’,CHENTao’TIANWen—Yu’LlChunf。Beo'ingNationalLabo4、ratoryforMolecularSciences.Radiochem&try&RadiationChemistryKeyLaboratoryfo,FundamentalScience,CollegeofChemistryandMolecularEngineering,PekingUniversity,Beijing100871,PR.China;SchoolofNuclearScienceandTechnology,LanzhouUniversity,Lanzhou730000,R.China1Abstra5、ct:TheadsorptionofSe(IV)ontocrushedBeishangranite(BS03.600m)wasstudiedbyabatchexperimentaImethod.Theresultsshowedthatthedistributioncoeficient(Kd)remainedalmostconstantinthepHrangeof3-7anddecreasedatpH>7.TheadsorptionofSe(IV)didnotvarywithionicstrength.Thepr6、esenceofCa(4.10x10一。moI·L一’)andS042一(3.17x10一mol·L一’)hadnoefectonSe(IV)adsorption.Moreover,wefoundthattheadsorptionofSe(IV)(1.46x10一mol·L一’)andEu(1l1)(3.33×10一。mol·L一’)onBeishangranitehadnoefectoneachotherintheternaryadsorptionsystemconsistingofSe(IV)/Eu(1l17、)/granite.TheadsorptionofSe(IV)ontoBeishangranitewasquantitativelyinterpretedbyconsideringthetwosurfacecomplexationreactionsofHseOitoform-SHSeO3and=SSeOionthe三SOHgeneraIadsorptionsites.KeyWords:Beishangranite;Adsorption;Selenium(IV);SurfacecomplexationmodeRe8、ceived:April12,2011;Revised:June8,2011;PublishedonWeb:July12,20l1.Correspondingauthor.Email:liucl@pku.edu.cn;Tel:+86—10-62765905ThepmjectwassupportedbytheNationalNaturalScienceFoundationofChina(
3、山花岗岩上的吸附作用相互之间没有表观影响.通过假定HSeO~在广义的吸附位点=SOH上发生了生成-SHSeO。和三SSeO的两个表面配位反应,定量解释了Se(iV)的吸附实验结果.关键词:北山花岗岩:吸附:Se(IV);表面配位模型中图分类号:0647.32AdsorptionofSe(IV)ontoBeishanGraniteGUOZhi—Jun’一CHENZong—YuanWUWang—SuoLIUChun—Li’,CHENTao’TIANWen—Yu’LlChunf。Beo'ingNationalLabo
4、ratoryforMolecularSciences.Radiochem&try&RadiationChemistryKeyLaboratoryfo,FundamentalScience,CollegeofChemistryandMolecularEngineering,PekingUniversity,Beijing100871,PR.China;SchoolofNuclearScienceandTechnology,LanzhouUniversity,Lanzhou730000,R.China1Abstra
5、ct:TheadsorptionofSe(IV)ontocrushedBeishangranite(BS03.600m)wasstudiedbyabatchexperimentaImethod.Theresultsshowedthatthedistributioncoeficient(Kd)remainedalmostconstantinthepHrangeof3-7anddecreasedatpH>7.TheadsorptionofSe(IV)didnotvarywithionicstrength.Thepr
6、esenceofCa(4.10x10一。moI·L一’)andS042一(3.17x10一mol·L一’)hadnoefectonSe(IV)adsorption.Moreover,wefoundthattheadsorptionofSe(IV)(1.46x10一mol·L一’)andEu(1l1)(3.33×10一。mol·L一’)onBeishangranitehadnoefectoneachotherintheternaryadsorptionsystemconsistingofSe(IV)/Eu(1l1
7、)/granite.TheadsorptionofSe(IV)ontoBeishangranitewasquantitativelyinterpretedbyconsideringthetwosurfacecomplexationreactionsofHseOitoform-SHSeO3and=SSeOionthe三SOHgeneraIadsorptionsites.KeyWords:Beishangranite;Adsorption;Selenium(IV);SurfacecomplexationmodeRe
8、ceived:April12,2011;Revised:June8,2011;PublishedonWeb:July12,20l1.Correspondingauthor.Email:liucl@pku.edu.cn;Tel:+86—10-62765905ThepmjectwassupportedbytheNationalNaturalScienceFoundationofChina(
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