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Precursors for brominated haloacetic acids during chlorination and a new

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  • 2020-12-12 15:52:06
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PrecursorsforbrominatedhaloaceticacidsduringchlorinationandanewusefulindicatorforbrominesubstitutionfactorLiliZheng1,HongjieSun1,ChouyeWu,YiboWang,YuanyuanZhang,GuangcaiMa,HongjunLin,JianrongChen,HuachangHong⁎CollegeofGeographyandEnvironmentalSciences,ZhejiangNormalUniversity,Jinhua321004,PRChinaHIGHLIGHTS•WatersamplesfromcitycontainedhigherOMlevelsthanthosefromcoun-tryside.•SUVAofwaterwasnegativelyrelatedwithChl-alevel.•HydrophobicityofprecursorwasrankedasBr-HAAsbBrCl-HAAsbCl-HAAs.•Br/UVAisagoodindicatorforBSFofdi-HAAsandtri-HAAs.•Br/UVAisalsoagoodindexforBSFfromotherwatersamplesandotherDBPs.GRAPHICABSTRACTabstractarticleinfoArticlehistory:Received2August2019Receivedinrevisedform1September2019Accepted1September2019Availableonline06September2019Editor:DamiaBarceloBrominatedhaloaceticacids(HAAs)aremuchmorecytotoxicandgenotoxicthanchlorinatedone,yetlittleinfor-mationisavailablefortheirorganicprecursors.Inthepresentstudy,8watersampleswerecollectedinEastChina:2fromlakes,2fromrivers,2fromreservoirs,awellandamountainspring.Dissolvedorganiccarbon(DOC),UVabsorbanceat254(UVA),specificUVA(SUVA)andchlorophylla(Chl-a)weredeterminedinrawwatersamples;formationof9HAAspeciesaswellasbrominesubstitutionfactor(BSF)weremeasuredinchlo-rinatedwatersamples.ResultsshowedthatwatersampleslocatedincitygenerallycontainedhigherlevelsofDOC(6.4–12.2mg/L)andUVA(0.124–0.194/cm),whilethoseinthecountryside,lowDOC(2.4–5.9mg/L)andUVA(0.061–0.109/cm)levelswereobserved.Negativerelationship(pb0.01)wasfoundbetweenSU

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