MAP法处理电厂高浓度氨氮废水的实验室研究杜天悦

324201812AridEnvironmentalMonitoringVol．32No．4Dec．．20182018－08－011973－、。MAP830019MAPpH。MAPX78A1007－1504201804－0188－03LaboratoryStudybyMAPMethodonTreatmentofHighConcentratedAmmoniaNitrogenWastewaterfromPowerPlantDUTian－yuePENGweiUrumqiPetrochemicalCompanyＲesearchInstituteofChinaNationalPetroleumUrumqiXinjiang830019ChinaAbstractBycontrollingthepHvalueandheatingtemperatureofthereactionprocessusingMAPmethodinthelaboratoryitwasinvestigatedthattheremovalrateofammonianitrogenindifferentMolarratioofreactants．Thentheoptimalreactioncondi-tionswereobtainedwhichprovidedatechnicalreferenceforoptimizingthetreatmentschemeofhighammonianitrogenwastewater．KeywordstheMAPmethodhighconcentrationammonianitrogenwastewaterremovalrate3000mg/L。123MAP。MAP、、、4。。11．1MAPMgNH4PO4。MgNH4PO4Ksp=2．5×10－1325℃。MgNH4PO41Mg2++PO43－+NH4++6H2O→MgNH4PO4·6H2O。11．21．2．1SEVENMULTI、。1．2．24MgCl2·6H2O203.3Na2HPO4142.0。MAPMgCl2、MgO、MgOH2MgCl2MgCl2、、MgO、MgOH2MgNH4PO4。MAPNa2HPO4NaH2PO4、H3PO4。33pH。Na2HPO4NaH2PO4、H3PO4pH。pHNa2HPO4。22．1MAPMAPMAP。。10min10min。2．2pHpH。pH＞10NH3。pHpH。MgNH4PO4pHpHMgNH4PO4。10%NaOHpHpH9．0～9．5NH3MgNH4PO42min。2．3nNH4+∶nMg2+∶nPO43－1∶1∶1。MgOH2Mg3PO42Mg2+、PO43+。4100ml0．224mol/L1。2nNH4+∶nMg2+∶nPO43－1∶1．3∶1．2。2．42．4．1。Na2HPO43～4minNa2HPO4MgCl2·981·4MAPNa2HPO42MgCl2Na2HPO4Na2HPO4MgNH4PO4。2。1MAP1234nN∶nMg∶nP—1∶1．5∶0．91∶1．3∶1．21∶1．2∶11∶1．3∶0．9pH—9999/mg·L－134909311977041130/%—73．394．479．867．62．4．2。95%94.4%。。3MAP、、。pH9．0～9．5Na2HPO4MgCl2nNH4+∶nMg2+∶nPO43－1∶1.3∶1.2MAP20min94%。MAP。MAP。1．J．200827160—61．2．J．2008313208—210．3．J．201322144．4．J．19924413—14．5．MAPJ．20115057．·091·32