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首页> 外文期刊>Environmental toxicology and chemistry >AEROBIC BIODEGRADATION OF 2 FLUOROTELOMER SULFONAMIDE-BASED AQUEOUS FILM-FORMING FOAM COMPONENTS PRODUCES PERFLUOROALKYL CARBOXYLATES
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AEROBIC BIODEGRADATION OF 2 FLUOROTELOMER SULFONAMIDE-BASED AQUEOUS FILM-FORMING FOAM COMPONENTS PRODUCES PERFLUOROALKYL CARBOXYLATES

机译:2种以氟代亚磺酰胺为基的成膜泡沫组分的好氧生物分解产生全氟烷基羧酸盐

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The biodegradation of 2 common fluorotelomer surfactants used in aqueous film forming foams (AFFFs), 6:2 fluorotelomer sulfonamide alkylamine (FTAA) and 6:2 fluorotelomer sulfonamide alkylbetaine (FTAB), was investigated over 109 d with aerobic wastewater-treatment plant (WWTP) sludge. Results show that biodegradation of 6:2 FTAA and 6:2 FTAB produces 6:2 fluorotelomer alcohol (FTOH), 6:2 fluorotelomer carboxylic acid (FTCA), 6:2 fluorotelomer unsaturated carboxylic acid (FTUCA), 5:3 FTCA, and short-chain perfluoroalkyl carboxylates (PFCAs). Additional degradation products included 6:2 fluorotelomer sulfonamide (FTSAm), which was a major degradation product in the presence of either active or sterilized sludge, whereas 6:2 fluorotelomer sulfonate (FTSA) production was measured with sterilized sludge only. Six additional degradation products were tentatively identified by quadrupole time-of-flight mass spectrometry (qTOF-MS) and attributed to N-dealkylation and oxidation of 6:2 FTAA. (C) 2017 SETAC
机译:在有氧废水处理厂(WWTP)的109 d内研究了用于水性成膜泡沫(AFFF),6:2氟调聚物磺酰胺烷基胺(FTAA)和6:2氟调聚物磺酰胺烷基甜菜碱(FTAB)的2种常见氟调聚物表面活性剂的生物降解。 )污泥。结果表明6:2 FTAA和6:2 FTAB的生物降解产生6:2氟调聚物醇(FTOH),6:2氟调聚物羧酸(FTCA),6:2氟调聚物不饱和羧酸(FTUCA),5:3 FTCA,和短链全氟烷基羧酸盐(PFCA)。其他降解产物包括6:2含氟端粒磺酰胺(FTSAm),这是在有活性污泥或无菌污泥的情况下的主要降解产物,而6:2含氟端粒磺酸盐(FTSA)的生产仅采用无菌污泥测量。通过四极杆飞行时间质谱(qTOF-MS)初步确定了其他六种降解产物,并将其归因于N-脱烷基化和6:2 FTAA的氧化。 (C)2017年SETAC

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