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284200912JournalofWuhanPolytechnicUniversityVol128No14Dec12009:2009204220.:(19852),,,E2mail:lijfen@163.com.:(2008CDA033).:100924881(2009)0420060203DOI:10.3969/j.issn.100924881.2009.04.015,,(,430023):,,,280,438nm220mg/L,1mg/L280,Fe3+SCN-:;;280;;:TQ085:ASpectrophotometricdeterminationofthiocyanatecontentinwastewaterLIUJian2jun,LIJian2fen,ZHOUHan2fen(SchoolofChemicalandEnvironmentalEngineering,WuhanPolytechnicUniversity,Wuhan430023,China)Abstract:Thispaperdescribesasimplemethodofdeterminationofthiocyanatecontentinwastewater.ThethiocyanatecontentinwastewaterwasdeterminedbySpectrophotometryinthe438nmwavelengthwithironnitrateascolouringreagentandTween280andacetoneasstabilizer.Calibrationcurvesarelinearintherange220mg/L,withthedetectionlimitof1mg/L.TheconditionsofcolourreactiononFe3+andSCN-arealsoinvestigatedinthepresenceofnon2ionicsurfactantTween280andacetone.Thismethodisveryidealforthedeterminationofthiocyanatecontentinindustrialanddomesticwastewater.Keywords:spectrophotometry;determination;Tween280;wastewater;thiocyanate,4200t,[1],[2],,,,[3],,SCN-,[4],,[5],280[6],,Fe3+[FeSCN]2+,SCN-SCN-,4,,:11.17200SCN-:0.1673gKSCN100mL,SCN-1000g/mL:50gFe(NO3)39H2O500mL,25mL1000mL280:20%,20mL280,100mL:20%,20mL100mL,:25%,144mL500mL1.21.2.1SCN-50mL,280,pH12(pH)pH2,pH[7],2min,,,1cmA,1.2.2:4,,[8]3,:10mL50mL,5mL,1mL2802mL,pH1.5,,1cm438nm,SCN-22.12.1.1,Tween280,Fe3+SCN-,11:438nm,12.1.2,[7],pH1,SCN-H+HSCN,;pH12,;pH2,,Fe3+,pH1.52.1.3280,,57mL,50mL5mL280Fe3+KSCN[5],20%2801.03.0mL,,1mL2802mL2.1.4,,20min280,100min2.1.5,10mL,10gSCN-,[9]5%,:Mn2+(40);Fe3+,Co2+,Cr2O2-7,Al3+(50);Cu2+(150);Pb2+(125);NH-4(200);Zn2+,CO2-3(500);Cl-,Ni2+(75);Ca2+,Cr3+(12.5);Cd2+(2500);Br-(0.5);I-,NO-2(3)Br-,I-,NO-2,2.2750mL,1620090.0,0.1,0.2,0.4,0.6,0.8,1.0mL,5mL,1mL2802mL,pH1.5,Fe3+SCN-2min,1cm,438nm,,22,:A=-0.00104+0.03936C(mg/L)0.9995,220mg/L,1mg/L2.3SCN-10mL50mL,5mL,1mL2802mL,pH,,1cm438nm,SCN-,1,[2,10]SCN-,,SCN-,11(n=3)/mgL-1/mg/mgL-1/%/%14.2990.055.21992.01.3225.1300.056.132100.21.8037.4750.19.515102.03.4248.7200.110.62895.41.691,5%,92%102%,,3,,280,Fe3+SCN-,:438nm,5mL,2801mL2mL,pH1.5,220mg/L,1mg/L,,,:92%102%,,:[1].[M].:,1997.112.[2],.[J].,2004,40(6):3522353.[3],,,.[J].2,1998,34(11):4882489.[4],.[J].(),1999,23(2):3882390.[5].220[J].,1995,24(4):27229.[6],.[M].:,2005.158.[7],,.[J].,2004,27(5):60261.[8],,.[J].2000,17(1):1912192.[9],,.[J].,2007,24(3):2822284.[10],.SCN2[J].(),2003,27(2):1412143.26
本文标题:分光光度法检测废水中的硫氰酸根含量
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