典型文献
Effect of activated sludge treatment on the formation of N-nitrosamines under different chloramination conditions
文献摘要：
Municipal wastewater discharge is considered as one of the main sources of N-nitrosamine precursors which can impact the qualities of downstream source waters and reclaimed wastewaters for potable reuse.N-Nitrosamine precursors can be removed to various degrees during biological wastewater treatment(e.g.,the activated sludge(AS)process).So far,little is known about the impact of the AS process on N-nitrosamine formation under practical disinfection condition(e.g.,uniform formation condition(UFC)).In this study,N-nitrosamine UFC from selected model compounds,sewage components(i.e.,blackwaters and greywa-ters)and sewage samples were comprehensively investigated during batch AS treatment tests.N-Nitrosodimethylamine(NDMA)formation from the tested precursor compounds(i.e.,trimethylamine(TMA)and sumatriptan(SMTR))under UFC chloramination decreased mostly after 6 or 24 hr treatment with different types of AS(i.e.,domestic rural AS,domes-tic urban AS,and textile AS),and the reductions in NDMA UFC were comparable to their NDMA formation potential(FP)reductions.In urine and feces blackwaters,NDMA UFC in-creased after 6 or 24 hr treatment with the domestic(i.e.,rural and urban)AS,while NDMA FP decreased substantially.The increases in NDMA UFC after AS treatment was presum-ably attributed to the removal of bulk organic matters(e.g.,dissolved organic carbon(DOC))which favored NDMA formation under UFC.On the other hand,in laundry greywaters hav-ing relatively abundant DOC,N-nitrosamine UFC was less affected by DOC removal before or after AS treatment,but decreased to similar degrees with N-nitrosamine FP.In sewage sam-ples collected from wastewater treatment plants,N-nitrosamines UFC tended to increase or remain constant during AS treatment,despite the decreases in their FPs.These results suggest that biological wastewater treatment(e.g.,the AS process)may not effectively re-duce N-nitrosamine formation(e.g.,measured under UFC)partially because the concurrent removal of bulk organic matters(e.g.,DOC)favored N-nitrosamine formation in s econdary effluents.
文献关键词：
中图分类号：
作者姓名：
Xiaolu Zhang;Daekyun Kim;Tanju Karanfil
作者机构：
Department of Environmental Engineering and Earth Sciences,Clemson University,Anderson,SC 29625,USA
文献出处：
引用格式：
[1]Xiaolu Zhang;Daekyun Kim;Tanju Karanfil-.Effect of activated sludge treatment on the formation of N-nitrosamines under different chloramination conditions)[J].环境科学学报（英文版）,2022(07):242-252
A类：
chloramination,nitrosamine,Nitrosamine,blackwaters,greywa,Nitrosodimethylamine,sumatriptan,SMTR,presum,greywaters,econdary
B类：
Effect,activated,sludge,treatment,formation,nitrosamines,under,different,conditions,Municipal,discharge,considered,sources,precursors,which,can,impact,qualities,downstream,reclaimed,wastewaters,potable,reuse,removed,various,degrees,during,biological,AS,process,So,far,little,known,about,practical,disinfection,uniform,UFC,In,this,study,from,selected,model,compounds,sewage,components,samples,were,comprehensively,investigated,batch,tests,NDMA,tested,trimethylamine,TMA,decreased,mostly,after,hr,types,domestic,rural,urban,textile,reductions,comparable,their,potential,urine,feces,while,substantially,increases,ably,attributed,removal,bulk,organic,matters,dissolved,carbon,DOC,favored,On,other,hand,laundry,hav,relatively,abundant,less,affected,by,before,similar,collected,plants,tended,remain,constant,despite,decreases,FPs,These,results,suggest,that,may,not,effectively,duce,measured,partially,because,concurrent,effluents
AB值：
0.406278
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