含砷废水处理工艺技术改进鄢红艳

＊1,2,　2(1大冶有色金属股份有限公司,湖北　黄石　435005;2福州大学,福建　福州　350108)　:,,2.0,pH8～9;10,pH8～10。、,。:;;TechnologyImprovementontheTreatmentofAs-containingWastewater＊YANHong-yan1,HUANGJi-cai2,HUHui2(1DayeNonferrousMetalsCo.,Ltd.,HubeiHuangshi435005;2FuzhouUniversity,FujianFuzhou350108,China)Abstract:TheapplicationofliquidFeCl3insteadofFeSO4inAs-containingwastewaterandtheinfluenceonthewastewatertreatmentsystemwerestudied.Atthesametime,theoptimaloperatingconditionsofthenewtechnologyweredeterminedthatm(Fe)/m(As)atthesecondoperationwas2andpH8～9whiletheratiowas10andpH8～10atthethirdoperationwhichwillprovidethebasisofthenewprocess.Keywords:As-containingwastewatertreatment;ferrictrichloride;effect　　　　　　　　　　　　　＊:(No:XRC-0629)。:(1973-),,,。E-mail:[e-mail]:(1975-),,,(),,。E-mail:[e-mail]。[1-2]、-[3-4]、[5]、[6]、[7-8][9-10]。-,:、;,。。12t,520m3,60t,2.1t,2.5mg/L。,,,,,。,[11],,。1　,1,:1　(1)():10%,pH=2。:Ca(OH)2+H2SO4=CaSO4+2H2O(2)():,,pH=8～9。::2H3AsO3+O2=2H3AsO44Fe2++O2+4H+=4Fe3++2H2O:FeCl3+3H2O=Fe(OH)3+3HCl:Fe3++2H3AsO4+2H2O=FeAsO4·2H2O+3H+:2≡FeOH+H3AsO4=≡FeAsO4-+2H2O+H+(≡FeOH:,):H2SO4+Ca(OH)2※CaSO4↑+2H2OFeSO4+Ca(OH)2※CaSO4↑+Fe(OH)2↑4Fe(OH)2+2H2O+O2※4Fe(OH)3↑2H3AsO3+Ca(OH)2※Ca(AsO2)2↑+4H2OH3AsO3+Fe(OH)3※FeAsO3↑+3H2O3As2O3+2Fe(OH)3※2Fe(AsO2)3↑+3H2O(3)():,,pH=8～10。:(2)·51·20113982　2.1　2　,2.5,,97%。,,2.5,,1mg/L,1.7,。,2.0。3　3,8,,98%。,40mg/L,10。2.2　pH,pH8～9,,。pH4～5,,,,pH8～9。,pH8～9。2.3　(1)1　/g/g%FeCl312.782.8677.08FeSO423.776.3274.99FeCl3/FeSO40.5380.45-　　,,45%,20%～30%。　　(2)。2.0g/L,,35～40t/d,60t/d,30%～35%,。,,0.10%～0.90%,;3%～5%,5%～7%。,,,。2.4　、、、,2.5t/d,540t/d,2.16%。:、、。,。2,2,。,,,。,。2　(g/L)3.072.194.123.431.862.662.5　(1)3　FeCl3/gFeSO4/gFeCl3/FeSO41.481.090.751.242.381.493.52.651.752.8272.530.420.410.430.440.340.59　　,,44%,,42%。(2)4　/(g/L)/(t/d)FeCl3FeSO4/(/d)FeCl3FeSO42349131611161981901183014560631284169994·52·2011398　　,。,2.0g/L,72;3.0g/L,122;4.0g/L,165。3　　(1),,20%-30%。,。(2),。,;,,。(3)。,,。[1]　,.NaS[J].,2000(4):41-43.[2]　.[J].,1988,7(1):50-56.[3]　.[J].,2005(4):42-45.[4]　.-[J].,2006,27(3):61-64.[5]　,,,.[J].,1998,25(6):75-80.[6]　,,.[J].,2009,35(12):6-10.[7]　,,.[J].,1988,8(6):63-69.[8]　,.[J].,1989,8(3):8-10.[9]　.[J].,1995(4):35-37.[10],.[J].,1996(2):42-48.[11]JiangJ.Q.Removingarsenicfromgroundwaterforthedevelopingworld-Areview[J].WaterSci.Technol,2001,44(6):89-98.(上接第14页)[14]LensinkC.SynthesisofChiralN-Alkyl-CyelopentadienylSuifon-amides[J].Tetrahedron:Asymmetry,1995,6(8):2033-2038.[15]DingC.H.,DaiL.X.,HouX.L.AnEfficientRing-OpeningReactionofAziridineswithAlkynes[J].Synlett,2004,10:1691-1694.[16]DingC.H.,DaiL.X.,HouX.L.Aconvenientandefcientring-o-peningreactionofaziridineswithacetylenesandsynthesisofdihydropy-rroles[J].Tetrahedron,2005,61(40):9586-9593.[17]YadavJ.S.,ReddyB.V.S.,SrinivasaRaoR.,etal.FirstexamplesofC-arylationofaziridinescatalyzedbyindiumtriate[J].TetrahedronLetters,2001,42(45):8067-8070.[18]WangZ.Y.,SunX.Y.,WuJ.FeCl3:anefcientcatalystforreactionsofelectron-richareneswithiminesoraziridines[J].Tetrahedron,2008,64(22):5013-5018.[19]BeraM.,RoyS.Silver(I)-DieneComplexesasVersatileCatalystsfortheC-ArylationofN-Tosylaziridines:MechanisticInsightfromInSi-tuDiagnostics[J].J.Org.Chem.,2010,75(13):4402-4412.[20]YadavJ.S.,ReddyB.V.S.,AbrahamS.,etal.InCl3-catalyzedregi-oselectiveopeningofaziridineswithheteroaromatics[J].TetrahedronLetters,2002,43(8):1565-1567.[21]HudlickyT.,RinnerU.,FinnK.J.,etal.ReactionsofIndoleDeriva-tiveswithOxiranesandAziridinesonSilica.Synthesisofa-Carbolin-1-oneMimicofPancratistatin[J].J.Org.Chem.2005,70(9):3490-3499.[22]BlyuminE.V.,GallonH.J.,YudinA.K.ConstructionofThreeContig-uousTertiaryStereocentersfromAziridinesinOneStep[J].OrganicLetters,2007,9(23):4677-4680.[23]MatsubaraS.,KodamaT.,UtimotoK.Yb(CN)3-CatalyzedReactionofAziridineswithCyanotrimethylsilane.AFacileSynthesisofOpticallyPure-AminoNitriles[J].TetrahedronLetters,1990,31(44):6379-6380.[24]YadavJ.S.,ReddyB.V.S.,ParimalaG.,etal.LithiumPerchlorateCatalyzedRegioselectiveRingOpeningofAziridineswithSodiumAzideandSodiumCyanide[J].Synthesis,2002,16,2383-2386.[25]PreimlM.,HillmayerK.,KlempierN.Anewapproachtoβ-aminoacids:biotransformationofN-protectedβ-aminonitriles[J].Tetra-hedronLetters,2003,44(27):5057-5059.[26]MinakataS.,OkadaY.,OderaotoshiY.,etal.LewisBaseCatalyzedRingOpeningofAziridineswithSilylatedNucleophiles[J].Org.Lett.,2005,7(16):3509-3512.[27]D'hoogheM.,NieuwenhoveA.V.,BrabandtW.V.,etal.Novelsyn-thesisof2-aminopentanedinitrilesfrom2-(bromomethyl)aziridinesandtheirtransformationinto2-imino-5-methoxypyrrolidinesand5-methoxypyrrolidin-2-ones[J].Tetrahedron,2008,64(6):1064-1070.[28]MatsukawaS.,TsukamotoK.TTMPP:Anefcientorganocatalystinthering-openingofaziridineswithsilylatednucleophiles[J].Org.Bio-mol.Chem.,2009,7:3792-3796.[29]HayashiY.,KumamotoT.,KawahataM.,etal.Ring-openingreactionofunactivated3-arylaziridine-2-carboxylateswithnitrilereagents[J].Tetrahedron,2010,66(21):3836-3841.[30]MitaT.,FujimoriI.,WadaR.,etal.CatalyticEnantioselectiveDesym-metrizationofmeso-N-AcylaziridineswithTMSCN[J].J.Am.Chem.Soc.,2005,127(32):11252-11253.·53·2011398