化学法处理焦化废水氨氮的研究程芳琴

,,(,030006):,。,,,,,;,;,,。:30℃;,;m(Mg2+)∶m(NH4+)∶m(PO43-)=1.3∶1∶1,,pH,。:;;:TQ115;A:1006-4990(2004)06-0052-02Studyontreatmentofammonium-nitrogenincokingwastewaterbychemicalmethodsChengFangqin,LiHua,YaoShaohua(CollegeofResourcesandEnvironment,ShanxiUniversity,ShanxiTaiyuan030006,China)　　Abstract:Theremovalofammonium-nitrogenfromcokingwastewaterbychemicalprecipitationmethodisstudied.Theresultsshowthatbyaddingprecipitantmagnesiumchlorideandsodiumhydrogenphosphateintothewastewatertoformmagnesiumammoniumphosphate,highremovalrateofammonium-nitrogencanbereachedandalsothemagesiumammoniumphosphateisavaluablereleasefertilizer.Thischemicaltreatmentmethodissimpleandeasytocombinewithothertreatingmethodandputintoindustrialproduction.Thesuitableprocessconditions:reactiontemperature30℃,theaddingsequence:magnesiumchlorideatfirst,thensodiumhydrogenphosphate,Mg2+∶NH4+∶PO43-(massratio)=1.3∶1∶1.　　Keywords:cokingwastewater;ammonium-nitrogen;magnesiumammoniumphosphate11.1　,:ρ()=223.5mg/L,ρ()=124.2mg/L,COD=1168mg/L,pH=8.0,=1.003kg/m3。1.2　[1]。1.3　MgCl2·6H2ONa2HPO4·12H2O,NH4+。:Mg2++NH4++HPO42-MgNH4PO4↑+H+1.4　、pH,,,,。3,,。DPS。2　2.1　2.1.1　反应温度的确定,,、30℃。,30℃。2.1.2　pH的确定pH=8,。,,pH7,,52　　　　　　　无机盐工业INORGANICCHEMICALSINDUSTRY　　　　　　　第36卷第6期2004年11月。2.1.3　药剂投加顺序、配比对氨氮去除率的影响,,。1。1　12AMgCl2·6H2ONa2HPO4·12H2O1※2BMgCl2·6H2ONa2HPO4·12H2O2※1CMgCl2·6H2ONa2HPO4·12H2O1※2DMgCl2·6H2ONa2HPO4·12H2O2※1EMgCl2·6H2ONa2HPO4·12H2O1※2FMgCl2·6H2ONa2HPO4·12H2O2※2　　(NH3-N223.5mg/L)1。A,Bm(Mg2+)∶m(NH4+)∶m(HPO42-)=1.1∶1∶0.9C,Dm(Mg2+)∶m(NH4+)∶m(HPO42-)=1.2∶1∶0.95E,Fm(Mg2+)∶m(NH4+)∶m(HPO42-)=1.3∶1∶1.01　1:A,C,EB,D,F;,,A,C,EB,D,F,。MgCl2·6H2O,Na2HPO4·12H2O。2.2　　,,。MgCl2·6H2O,Na2HPO4·12H2O,[m(Mg2+)∶m(NH4+)∶m(HPO42-)]①1.4∶1.0∶1.1;②1.5∶1.0∶1.15;③1.6∶1.0∶1.2。(223.5mg/L)2。22.3　A2/OA2/O(--),、、,,,。A2/O,CODNH3-N,:(1)OCOD,,,NH3-N;(2)NH3-N,COD,[2]。,,。,。A2/O,,。3　　　MgCl2·6H2ONa2HPO4·12H2O,MgCl2·6H2O,Na2HPO4·12H2O。　　m(Mg2+)∶m(NH4+)∶m(PO43-)=1.3∶1∶1,pH,。:[1],,.()[M].:,1995.381-385,393-401[2],.[J].,2004,29(1):51-52,54:2004-08-15:(1964—),,,20,、、,。:[e-mail]532004年11月　　　　　　　　　　程芳琴等:化学法处理焦化废水氨氮的研究