重金属对厌氧铵氧化的抑制作用

830ResearchArticleReceived:12March2014Revised:10March2014Acceptedarticlepublished:14March2014PublishedonlineinWileyOnlineLibrary:9April2014(wileyonlinelibrary.com)DOI10.1002/jctb.4377InhibitionofanaerobicammoniumoxidationbyheavymetalsGuangbinLi,*DanielPuyol,JoseMariaCarvajal-Arroyo,ReyesSierra-AlvarezandJimA.FieldAbstractBACKGROUND:Anaerobicammoniumoxidation(anammox)isapromisingapproachforremovingnitrogenfromlandfillleachatesandothernitrogen-ladenwastewater.Althoughheavymetals,whichareknownfortheirmicrobialtoxicity,arecommonlypresentinthosewastewaterstreamsinformationontheirinhibitoryimpactonanammoxactivityisstilllimited.Themainaimofthisstudyistoinvestigatetheinhibitoryeffectsofsixcommonmetalions(Cu2+,Cd2+,Ni2+,Zn2+,Pb2+,andmolybdate)onanammoxactivity.RESULTS:Thesolubleconcentrationsofcationicmetalsdecreasedduetoprecipitationreactions.Cu,Zn,Cd,andNiwerethemosttoxicmetalswith50%inhibitingsolubleconcentrationsof4.2,7.6,11.2,and48.6mgL-1,respectively.MolybdateandPb2+werenotoronlymoderately