含氯胺水管网输配过程中红水现象的产生机理

3512201612ENVIＲONMENTALCHEMISTＲYVol．35No．12December20162016420ＲeceivedApril202016．*51508582．SupportedbytheNationalNaturalScienceFoundationofChina51508582．＊＊[e-mail][e-mail]10．7524/j．issn．0254-6108．2016．12．2016042001．J．201635122575-2581．FUJunZHOUBinTENGMan．StudyonthemechanismofredwaterphenomenonduringdrinkingwaterdistributionbychloraminationdisinfectionJ．EnvironmentalChemistry201635122575-2581．*123＊＊1．1000292．211000383．100012．．．XＲDα-FeOOHβγ-FeOOHα-FeOOHα-FeOOHβγ-FeOOHα-FeOOH．．StudyonthemechanismofredwaterphenomenonduringdrinkingwaterdistributionbychloraminationdisinfectionFUJun1ZHOUBin2TENGMan3＊＊1．Sino-JapanFriendshipCentreforEnvironmentalProtectionBeijing100029China2．TheAdministrativeCenterforChina'sAgenda21Beijing100038China3．ChinaNationalEnvironmentalMonitoringCenterBeijing100012ChinaAbstractThispapersystematicallystudiedthewaterqualitychangesoftheregionaldistributionsysteminfluencedbypipematerialsandchloraminationdisinfectioninanortherncityinChina．Theresultsshowedthatthewaterqualityoftheregionaldistributionsystemwasstableandtherateofchloraminedecayfollowedthesecondorderkineticswhichwasthesameasthedecaymodeofchloramineitselfinwater．Itindicatedthatthetransmissionprocessofregionaldistributionsystemhadlittleinfluenceonwaterquality．Throughtheoldpipelinesimulationexperimentsinlaboratoryweanalyzedtheprocessandmechanismofredwaterphenomenoncausedbythechangeofwatersource．Thecorrosivityofchloramineinironpipewasstrongerthanchlorineandchloramineincreasedthemetaldissolutioninrawwater．Thecorrosivityofrawwaterwouldbeenhancedwhentheconcentrationofsulfatewasincreased．ViaXＲDanalysisthepipelineinwhichredwaterphenomenonoccurredcontainedlessα-FeOOHandmoreβγ-FeOOHwhiletheoppositewastrueinthepipelinewheretheredwaterphenomenonneveroccurred．Itwassupposedthatα-FeOOH257635mightbethemaincomponentofthedenseprotectivelayerformedontheinnerwalloftheironpipewhichhelpedtomaintainthestabilityofwaterquality．Keywordswaterdistributionredwaterdisinfectionironrelease．．．．、．、、、．、、1-724%—37%18“”．“”．“”．．、．．、9-15．．1Materialsandmethods1．1．5km31．5km．、pH、、、、、、、．/、Fe、．13km800mm5．XＲD．1．1Table1AnalyticalinstrumentsandmethodsParameterMethodInstrumentXＲDＲigakuD/max2550VOPTIMA2000/DPDHACHUV4000HACH2100NpHpHMETTLEＲTOLEDOMETTLEＲTOLEDO1225771．22．5cm、5m、15、．2Ｒesultsanddiscussion2．1、75mm1/350、40、25mm1990300mmCaCO3．2．．2Table2MaterialtypeoftrunknetworkinthecityMaterialNumber/Length/kmMaterialNumber/Length/km756091379038．7800X1292380．860015599384092．6700X822293．540014771360005．8600X14382．66006500140671．73002．2、、、4A、B、C、D43、、、、、pHA、B、C34C38．5mg·L－1224mg·L－1．3Table3CharacteristicsofwaterqualityParameter/mg·L－1ABCDBeforeAfterBeforeAfterBeforeAfterBeforeAfterNO3-N6．750．91．22．31．91．92．3NH3-N0．160．280．020．02THMsμg·L－12．12．416．58．720．613．732．89．8TurbidityNTU0．160．230．20．180．280．260．160．16Chloride59．766．320．732．714．751．416．636．2Sulfate8215642．498．738．522435．2130SS522570294302254500204394CaCO3314195170120163120142140Alkalinity314329170197163280142241CODMn0．361．80．870．761．51．10．550．72pH7．547．637．577．817．957．727．937．76Ｒesidualchlorine0．650．80．70．80．60．550．60．62578352．3．600mm400mm300mm100mm．5km31．5km．、pH、、、、、．4．4Table4WaterqualityofnetworkinstudyareaSiteTemperaturepHDO/mg·L－1Ｒesidualchlorine/mg·L－1TurbidityNTUFe/μg·L－1NO－3/mg·L－1NH3-N/mg·L－1THMs/μg·L－1116．47．443．250．530．412797．510．850．07614．44216．77．324．10．50．204586．120．850．0617．08316．47．542．80．740．166755．890．740．0919．64415．87．453．530．770．234061．680．930．117．08515．87．233．550．890．395564．430．870．1814．81615．87．183．80．230．324094．230．820．1116．17715．87．253．380．820．9225126．430．870．1214．20816．97．253．550．570．306077．860．890．0913．99915．57．422．750．670．2880107．390．780．0813．711015．67．423．810．780．267060．870．760．0817．651115．67．373．180．730．220535．741．090．0812．371217．87．183．580．510．185049．640．950．0716．0415km115km0．9mg·L－10．6mg·L－1．．．1Fig．1Kineticsofchloraminedecayintrunkpipe2．4、．“”．C198490122579．B．．3．2．4．1．B．2h．100mL·min－13．3mm·s－1．1．3mg·L－123122h．B．B0．3mg·L－1．7．．2Fig．2Speciesofdissolovedironduringchloraminationandchlorination3Fig．3ComparisonofNTUduringchloraminationandchlorination2．4．2pH、、Cl－、SO2－4、NH+4、Cu2+、Fe2+、Mn2+．．“”100mg·L－1．4．4Fig．4Effectofsulphateonironreleasefromoldgalvanizedpipe25803524h2．0mg·L－13．0mg·L－1“”．2．4．3XＲD5．1αγ-Fe2O3、α-FeOOH、βγ-FeOOH、Fe3O4、FeCO32α-FeOOHβγ-FeOOHα-FeOOHα-FeOOHβγ-FeOOHα-FeOOHα-FeOOH．5XＲDFig．5XＲDspectraofthegalvanizedpipewithoutandwitha“redwater”phenomenon．CaCO3、Goethiteα-FeOOHMagnetiteFe3O4Lepidocrociteγ-FeOOH6．．．Fe3O4、α-FeOOH、γ-FeOOH．．Lepidocrociteγ-FeOOH．Larson、“”11-15．6．3Conclusion．．．．0．9mg·L－10．6mg·L－1．1．2．3α-FeOOHβγ-FeOOHα-FeOOHα-FeOOHβγ-FeOOH．α-FeOOH122581．6Fig．6MechanismofredwaterphenomenonduringdrinkingwaterdistributionＲeferences1．J．1993191115-19．HEWHQIYZOUYK．InvestigationandanalysisonwaterqualityofsomedistributionnetworksJ．Water＆WastewaterEngineering1993191115-19inChinese．2．J．20113071236-1240．YEBXWANGWYYANGLSetal．Effectofcombineddisinfectionwithchlorineandchlorinedioxideonthefornationofdisinfectionby-productsindrinkingwaterJ