NaClO氧化去除高盐废水中氨氮的影响因素及其动力学研究方小琴

INDUSTRIALWATER＆WASTEWATERVol．48No．2Apr.，20171，1，1，2（1.，200437；2.，200434）：（201405267），。，（Cl-）1％，20～100mg／L，：NaClO，。：NaClO，NaClO、、、。NaClO0.6%，0.01575min-1。，，45mg／L，，。，2.0%，，，。，，10℃35℃，0.00188min-10.01043min-1。：NaClO；；；：X703.1：A：1009－2455（2017）02－0018－06InfluencingfactorsandkineticsofammonianitrogenremovalinhighsalinitywastewaterbyNaClOoxidationFANGXiao-qin1，HUJun-jie1，XIAJun-fang1，2（1.ShanghaiJingyuEnvironmentEngineeringCo.,Ltd.,Shanghai200437,China;2.ShanghaiNormalUniversity,Shanghai200434,China）Abstract：UsingNaClOoxidationtodegradeammonianitrogeninhighsalinitywastewater,theinfluencingfactorsandkineticsofthereactionwerestudied.Theresultsshowedthat,thedegradationprocessofammoniani-trogenbyNaClOfollowedpseudo-first-orderkineticsmodel,andtheinfluencingfactorsincludeddosageofNaClO,initialconcentrationofammonianitrogen,salinity,temperatureandsoon.WhentheNaClOdosagewas0.6%,thereactionratewasashighas0.01575min-1.Thehighertheinitialconcentrationofammonianitrogenwas,theworsetheeffectofoxidationreactionwouldbe.Whentheinitialmassconcentrationwasnotabove45mg／L;withtheincreasingofinitialconcentration,theinfluenceofitonoxidationrateconstantincreased.Lowsalinityhadlittleinfluenceonammonianitrogenoxidation,however,whenthesalinitywasover2.0%,theinhibitingeffectofitonammonianitrogenoxidationwouldbestrengthened,andthereactionrateconstantdecreaseddistinctly.In-creasingreactiontemperaturewasbeneficialtoammonianitrogenoxidationanddegradation.Duringtheprocessofthetemperatureincreasedfrom10℃to35℃,thereactionrateconstantincreasedfrom0.00188to0.01043min-1.Keywords：NaClOoxidation;highsalinitywastewater;kinetics;ammonianitrogenNaClO!!!!!!!!!!!!!!!!!!!!!!!!·18·100～300mg／L，［1－5］。NaClO，［6-7］。，，［8］，，，NaClO。NaClO，，NaClO、、、，。11.1：NaClO（10％，CP）、NaCl（）。：752、WTW3210pH、WTW330i。1.2，1。1.3NaClO，NaClOHClO，HClO（NH2Cl）、（NHCl2）（NCl3）。NCl3pH5．5，，2，NCl3［9］。［10-11］：NaClO＋H2O→HClO＋NaOH（1）NH3＋HClO→NH2Cl＋H2O（2）NH2Cl＋HClO→NHCl2＋H2O（3）NHCl2＋H2O→NOH＋2Cl-＋2H＋（4）NHCl2＋NOH→N2↑＋HClO＋H＋＋Cl-（5）：2NH3＋3NaClO→N2↑＋3H2O＋3NaCl（6），，NaClO1．5∶1，7．97∶1，，，1gNaClO7．97g。1.4200mL6，NaClO，，，，（NaClO）；，，，；，，，；、，，，。1.5pH、，（Cl-），，CODCr。22．1NaClO43．6mg／L，CODCr250～300mg／L，1．0％，（25±1）℃，NaClO，1。1，NaClO，，，0．6％，180min，94．3％，，，。，NaClO0．6％，m（NaClO）∶m（）＝13．76∶1。1g7．97gNaClO，，NaClO。1，，，：lnC＝lnC0－kt①1Tab．1ExperimentalwatercharacteristicspH／%ρ（）／（mg·L－1）ρ（CODCr）／（mg·L－1）6.5~7.50.5~3.020~80250~300，，：NaClO·19·INDUSTRIALWATER＆WASTEWATERVol．48No．2Apr.，2017ln（C／C0）＝－kt②：C0———，mg／L；C———tmin，mg／L；t———，min；k———，min－1。ln（C／C0），t，2。2，NaClO，，。k3。3，NaClOk，R20．9790。NaClO0．3％0．6％，k0．00278min－10．01575min－1；NaClO0．8％，k0．01745min－1，。NaClO，，，NaClO，HClO，。2．2NaClO0.6%，CODCr250～300mg／L，1．0％，（25±1）℃，4。4，，。22．7～45．0mg／L，88．2％；45．0mg／L80．0mg／L，88．2％55．9％。，，45．0mg／L。5。5，，R20．98，k，6。

















































20406080100120140160180t／minρ（）／（mg·L－1）504030201000.3%0.6%0.4%0.7%0.5%0.8%（a）



















































1NaClOFig.1EffectofNaClOdosageonammonianitrogenremoval20406080100120140160180t／min／%1008060402000.3%0.6%0.4%0.7%0.5%0.8%（b）





2NaClOFig.2ChangesofammonianitrogenconcentrationalongwithtimeunderdifferentdosageofNaClO20406080100120140160180t／minln（C／C0）0-1-2-3-4-50.3%，y=-0.00278x，R2=0.98990.6%，y=-0.01575x，R2=0.99800.4%，y=-0.00658x，R2=0.99280.7%，y=-0.01678x，R2=0.99900.5%，y=-0.01061x，R2=0.99550.8%，y=-0.01745x，R2=0.99723NaClOkFig.3EffectofNaClOdosageonreactionrateconstant(k)0.30.40.50.60.70.8NaClO／%k／min-10.0200.0150.0100.0050k＝0．0185－（0．0051／CNaClO）·exp［－3．1668（lnCNaClO＋1．0369）2］R2＝0．9790·20·



































































































































6，R20．9450，。，，k，22．7mg／L80．0mg／L，k0．01872min－10．00430min－1。；45．0mg／L，，。2．343．6mg／L，NaClO0.6%，CODCr250～300mg／L，（25±1）℃，，7。7，0．5%～2．0％，，180min，19．6mg／L；2．0%～3．0％，，20406080100120140160180t／minρ（）／（mg·L－1）100806040200（a）4Fig.4Effectofinitialconcentrationofammonianitrogenonitsremoval20406080100120140160180t／min／%10080604020022.7mg／L（b）45．0mg／L35．5mg／L80．0mg／L68．2mg／L55．0mg／L22.7mg／L45．0mg／L35．5mg／L80．0mg／L68．2mg／L55．0mg／L






5Fig.5Changesofammonianitrogenconcentrationalongwithtimeunderdifferentinitialconcentrationsofammonianitrogen20406080100120140160180t／minln（C／C0）0-1-2-3-4-522．7mg／L，y=-0.01872x，R2=0.995755．0mg／L，y=-0.00658x，R2=0.997935．5mg／L，y=-0.01564x，R2=0.996968．2mg／L，y=-0.00542x，R2=0.995645．0mg／L，y=-0.01161x，R2=0.989980.0mg／L，y=-0.00430x，R2=0.98026kFig.6Effectofammonianitrogenonreactionrateconstant(k)20304050607080C0／（mg·L－1）k／min-10.0200.0150.0100.0050k＝exp［－（3．6189＋0．0104C0＋1．9526×10－4C02）］R2＝0．9450
















































































20406080100120140160180t／minρ（）／（mg·L－1）45403530252015（a）7Fig.7Ammonianitrogenremovalunderdifferentsalinityconditions20406080100120140160180t／min／%60504030201000.5%2.5%1.0%2.0%1.5%3.0%（b）0.5%2.5%1.0%2.0%1.5%3.0%，，：NaClO·21·INDUSTRIALWATER＆WASTEWATERVol．48No．2Apr.，2017，，180min，41．1％。，8。8，，R20．99，k，9。9，0．5%～2．0％，k；2．0％3．0％，，k0．00468min－10．00315min－1。2．0％，；2．0％，，，。Na