次氯酸钠催化氧化法处理氨氮废水的研究章启帆

整理文档很辛苦,赏杯茶钱您下走!

免费阅读已结束,点击下载阅读编辑剩下 ...

阅读已结束,您可以下载文档离线阅读编辑

资源描述

*,,,(,215009):,m()∶m()=7.7、pH=7、100mg/L,5%。,,,(TN)。,,;;;pH7;。:;;;:TQ126.2:A:1006-4990(2018)01-0052-05Studyontreatingammonia-nitrogenwastewaterwithcatalyticoxidationofNaClOZhangQifan,LiYong,XuTing,ZhuWei(SchoolofEnvironmentalScience&Engineering,SuzhouUniversityofScience&Technology,Suzhou215009,China)Abstract:N2andNO3-aretheproductsofoxidizingammonia-nitrogenwithNaClO.TheproductivityofNO3-was5%whentreating100mg/Lammonia-nitrogenwastewatercompletelyintheconditionsofm(Cl2)∶m(NH3)=7.7,pH=7andnormaltem-perature.Comparedwithothercatalysts,Ni2O3providedthebesteffectofcatalyticoxidationofcuttingreactiontimeanddecreasingresidualchlorine,buttheremovalrateoftotalnitrogen(TN)decreased.ThereactionrateandNO3-productivityincreasedwiththeincreasingofNi2O3dosage;Thetreatingefficiencyunderhighinitialconcentrationwaslowerthanthatoflowinitialconcentration;ThereactionratewasacceleratedwhenaddingNi2O3buttheNaClOneededinwasunfavorableforcatalyticoxidationdirectoxidationcannotbecutdown;ThesuitablepHwas7undertheseexperimentalconditions;TheNaClO′sselfdecompositionduetothehightemperature.Keywords:catalyticoxidation;NaClO;ammonia-nitrogen;metaloxides,。,。,[1],[2]。,,,,[3];,[4-5]。,。11.1:NH4Cl,pHNaOHHCl。:NaClO,(5%)。:Ni2O3,();:Ni2O3-MgO、Ni2O3-Fe2O3、Ni2O3-Fe2O3/MgO、Ni2O3-Fe2O3/SiO2,[4,6]。1.21.2.1,,、、,,*:()(201223276);;2015/(SKCX15_023)。··50120181INORGANICCHEMICALSINDUSTRYVol.50No.1Jan.,2018,[7]:NaClO+H2O=HClO+NaOHNH3+HClO=NH2Cl+H2ONH2Cl+HClO=NHCl2+H2ONHCl2+H2O=NOH+2Cl-+2H+NHCl2+NOH=N2↑+HClO+H++Cl-:NH3+1.5NaClO=0.5N2↑+1.5H2O+1.5NaCl,11.5,,,[8]。1.2.2NaClO,Ni2O3,,[9]:Ni2O3+NaClO=2NiO2+NaCl2NiO2+NaClO=Ni2O3+NaCl+2[O](NiO2)([O]),,,。,Ni2O3,。1.3,50mL,HClNaOHpH,,(DF-101S),NaClO,5min,40min。,;,,,、、、pH。1.4,HJ535—2009《》;NO3-(ICP-9000);[10]。22.1100mg/L,pH=7,,,,1。1,,,m(Cl2)∶m(NH3)=7.7,,100%。m(Cl2)∶m(NH3)≥7.7,NO3-,(TN),95%92.4%,,N2,NO3-,m(Cl2)∶m(NH3)≥7.7,NO3-。,,100%,。,m(Cl2)∶m(NH3)=7.7,,TN,。1m(Cl2)∶m(NH3)2.2Ni2O3(A),Ni2O3-MgO(B)、Ni2O3-Fe2O3/MgO(C),Ni2O3-Fe2O3(D)、Ni2O3-Fe2O3/SiO2(E)。100mg/L,m(Cl2)∶m(NH3)=7.7、pH=7、510g/L,2。2,,Ni2O3,100%,4Ni2O3,,[4],,Ni2O3,Ni2O3NaClO,20181:53[11],。,,。22.3Ni2O3,Ni2O3,100mg/L。m(Cl2)∶m(NH3)=7.7、pH=7、,Ni2O331。3,Ni2O3,,35min100%。,,。Ni2O318g/L,20min100%,Ni2O3,。1,Ni2O3,NO3-,TN94.91%76.24%,3Ni2O3,,NO3-,TN。,,Ni2O3,6g/L8.86mg/L。,,NO3-,TN。1Ni2O3TN2.4m(Cl2)∶m(NH3)=7.7、10g/LNi2O3、pH=7、,,42。42TN4,,,50mg/L25min,600mg/L10min。,。,NH2ClNHCl2NH2Cl[12],35min。TN,,NO3-TNNi2O3/(g·L-1)TN/%/(mg·L-1)Ni2O3/(g·L-1)TN/%/(mg·L-1)094.9139.011088.038.86294.7035.461486.908.86690.958.861876.248.86/(mg·L-1)TN/%/(mg·L-1)/(mg·L-1)TN/%/(mg·L-1)5080.808.8640090.1062.0510088.008.8660091.80137.4120090.9039.0050154。,100%,,,,100%。2.5Ni2O3NaClO。100mg/L,10g/LNi2O3、pH=7、,100%NaClO。m(Cl2)∶m(NH3)53。5m(Cl2)∶m(NH3)3m(Cl2)∶m(NH3)TN5,Ni2O3NaClO,m(Cl2)∶m(NH3)(NaClO),,Ni2O3,Ni2O3,25min,35min。3,Ni2O3TN,NO3-,N2TN。,m(Cl2)∶m(NH3),Ni2O3。,Ni2O3,,。2.6pH,pH,pHNH3,NH4+[13],pHOH-,NaClO,,pH。pH8[14]。。100mg/L、m(Cl2)∶m(NH3)=7.7、10g/LNi2O3、,pH,6、4。6pH4pHTN64,pH,,pH=594.75%,pH,100%94.30%。,pH6pH8,NH4+,pHNH3,,pH≥9,NaClO。pHNO3-50mg/L,TN,NaClOpHNi2O3pH。,pH,pH=7m(Cl2)∶m(NH3)TN/%/(mg·L-1)Ni2O37.788.038.867.479.9039.897.168.4362.067.795.0039.007.489.9049.647.180.0178.50pHTN/%/(mg·L-1)pHTN/%/(mg·L-1)584.5723.05888.0017.73689.0018.27982.9926.59788.038.8620181:55NaClO。,pH=7。2.7NaClO[15],。100mg/L、m(Cl2)∶m(NH3)=7.7、10g/LNi2O3,,75。75TN75,,,45℃,5min,。,,100%93.75%,NaClOm(Cl2)∶m(NH3),。NO3-,TN。,NaClO,,。,,TN。31)Ni2O3,,,NO3-,TN。2),NaClO,;Ni2O3,NaClO;pH,pH7,pHNaClO;NaClO,,,。3),Ni2O3,。:[1],,.[J].,2006,24(5):45-47.[2],.[J].,1997(4):21-24.[3],,,.[J].,2001,14(2):32-33.[4],,.[J].,2009,17(8):72-76.[5]KingF,HancockFE.Catalysisandpollutionabatement:theremovalofhypochloritefromwastechlorine/causticeffluent[J].CatalysisToday,1996,27:203-207.[6],,,.[J].,2010,42(9):14-17.[7],.[J].,2013(1):18-21.[8],,,.[J].,2013,165(2):39-42.[9],,.Ni2O3NaClO[J].,2009,28(6):962-966.[10].[M].:,2012.[11],,,./[J].,2014,46(12):79-80.[12],,.[J].,2009,40(3):23-26.[13]HoignéJ,BaderH,HaagWR.Rateconstantsofreactionsofozonewithorganicandinorganiccompoundsinwater-:Inorganiccom-poundsandradicals[J].WaterResearch,1985,19(8):993-1004.[14].[J].,2007,32(12):97-100.[15].[J].,2007,39(9):12-14.———————————:2017-07-29:(1992—),,,。::279043319@qq.com/℃TN/%/(mg·L-1)/℃TN/%/(mg·L-1)1588.038.866081.9422.163088.3817.737582.8626.594586.5417.7350156

1 / 5
下载文档,编辑使用

©2015-2020 m.777doc.com 三七文档.

备案号:鲁ICP备2024069028号-1 客服联系 QQ:2149211541

×
保存成功