高碱度水混凝过程中残余铝控制影响因素的研究

472河南农业大学学报Vol．47No．220134JournalofHenanAgriculturalUniversityApr．20132012－08－1212A6100081958．1000－2340201302－0197－05(华北水利水电学院环境与市政工程学院，河南郑州450045)针对高碱度水厂水夏季残余铝超标问题，选取4种不同铝盐絮凝剂考察其混凝效果及残余铝情况，同时考察投加一定量FeCl3和KMnO4优化混凝控制残余铝效果．结果表明，pH值和温度是影响混凝过程残余铝控制的重要因素;AlCl3和Al2(SO4)3混凝去除浊度和DOC效果良好，同时残余铝含量较低;Fe和Mn均能达到优化混凝控制出厂水残余铝含量在0．2mg·L－1以下的要求．高碱度水;混凝;铝盐;残余铝;水处理X52AInfluencefactorsonresidualaluminumcontrolduringcoagulationofhighalkalinitywaterZHULing-fengTIANYan-eHUANGDou-douCHENGui-xiaCHENGMengZHANGNanInstituteofEnvironmental＆MunicipalEngineeringNorthChinaUniversityofWaterResourcesandElectricPowerZhengzhou450045ChinaAbstractInordertominimizetheresidualaluminumlevelsinthetreatmentoffactorywaterwithhighalkalinityinsummerwechosefourcoagulantstoinvestigatethecoagulationeffectandthesituationofresidualaluminum．SimultaneouslywealsoinvestigatedtheeffectoftheresidualaluminumcontrolbydosingsomeFeCl3andKMnO4．TheresultsshowedthatpHvalueandtemperatureweretheimportantinfluencefactorsontheresidualaluminumcontrol．AlCl3andAl2SO43wereveryeffectiveonthetur-bidityandDOCremovalandtheycouldcontroltheresidualaluminumatlowlevels．FeandMnbroughtaboutmarkedinfluenceonresidualaluminumcontrolduringcoagulationprocess．BymeansofaddingFeandMnwecouldcontroltheresidualaluminumconsistenceunderthelevelof0．2mg·L－1．Keywordshighalkalinitywatercoagulationaluminumcoagulantresidualaluminumwatertreat-ment1．．、．、、23．2006《》GB5749—20060．2mg·L－1．45pH．19847pH．pH．、、4～6．AlCl3Al2SO43Al13PACl1PACl2FeCl3KM-nO4．11．1pH8．235．68NTUDOC6．91mg·L－1UV2540．073cm－10．008mg·L－1．AlCl3·6H2O、Al2SO43·12H2O、FeCl3、KMnO4、HCl、NaOH、KF．1．27Al13PACl1PACl2AlCl3Al2SO43AlCl3Al2SO430．5mol·L－1Al．41．AlTAlPerkinElmerOptima2000UKGB15892—200327Al－27AlNMR73Alm、Al13、AlupHpH720AThermoOrionUSA．1．320℃MY3000－6．400mL500mL200r·min－130s250r·min－12min40r·min－115min30min2cm0．45μmDOC、．1Table1CharacteristicsofcoagulantsCoagulantsAlT/g·L－1pHBAlm/%Al13/%Alu/%PACl115．664．112．4110．9176．9312．16PACl267．604．302．2412．9721．1365．89AlCl313．502．380．00100．000．000．00Al2SO4313．502．240．00100．000．000．001．427Al－27AlNMRVARIANUNITYINOVA500MHzNMRDOCShimadzuCo．JapanUV254/HitachiHigh-TechnologiesCo．JapanAgilent7500aUSAHACH2100N．22．11～4pH、COD、、PACl13．4mg·L－1Al．pH、COD、、CODpH．pHpHR20．549110．33056．1～4pH．AlpHpH6．5～7．5AlOH3pH＞8．5AlOH4－pH8．2199pH．pHpH．pH4．4Fig．4Thelinearrelationshipofresidualaluminumwithwaterturbidity2．24AlCl3Al2SO43PACl1PACl2DOC56．DOC0．5～3．0mg·L－1AlDOC10%～50%1．5～3．0mg·L－1Al90%．PAC21．0mg·L－1AlAlCl3Al2SO43PACl11．5mg·L－1Al．0．5～1．5mg·L－1Al4PACl2＜PACl1＜AlCl3Al2SO432．0～3．0mg·L－1Al4AlCl3Al2SO43＜PACl1＜PACl2．pHpH6．5～7．5AlOH3pHAlOH3．pH7．AlCl3Al2SO43AlOH3PACllPACl2《GB5749—2006》0．220047mg·L－1．pHpH．2．3FeMnPACl23．0mg·L－1AlFeCl3KMnO4．Fe/Al20．10．20．30．40．50．6Fe/Al0．3Mn0．20．3、0．40．50．71．0mg·L－1．Fe/AlMnA～F89FeMn0．2mg·L－1NTU90%DOC31．91%～36．11%．FeMnDOC．FeMn．910．．FeCl3pH220111．Fe．ξ12．FeMnDOC、DOCAlFeMn．31pH、COD、、pH．21．5～3．0mg·L－1Al0．2mg·L－1DOC．3FeMnDOC31．91%～36．11%NTU90%0．2mg·L－1FeMn．1DUANJGREGORYJ．CoagulationbyhydrolyzingmetalsaltsJ．AdvanceinColloidandInterfaceSci-ence2003100475－502．2．J．200623160－63．3．J．20012359－11．4．J．200117105－8．5．J．20103161542－1547．6．J．2005114343－345．7LIUHJQUJHHUCZetal．CharacteristicsofnanosizedpolyaluminumchloridecoagulantpreparedbyelectrolysisprocessJ．ColloidsandsurfacesAPhysicochemicalandEngineeringAspects2003216139－147．8．J．199221627－30．9PALLIERVFEUILLADE-CATHALIFAUDGSER-PAUDBetal．Effectoforganicmatteronarsenicre-movalduringcoagulation/flocculationtreatmentJ．JournalofColloidandInterfaceScience201034226－32．10HUCZLIUHJQUJHetal．CoagulationbehaviorofaluminumsaltsineutrophicwatersignificanceofAl13speciesandpHcontrolJ．EnvironmentalSci-enceandTechnology2006401325－331．11．J．20082851187－1191．12．//J．200828177－80．(责任编辑:蒋国良)