α,β-unsaturated sulfophenylcarboxylates as degradation intermediates of linear alkylbenzenesulfonates: evidence for Ω -oxygenation followed by β-oxidations by liquid chromatography-mass spectrometry

摘要

Liquid chromatography with an electrospray interface to a mass spectrometer (LC-ES-MS) and LC-ES coupled to a tandem MS(LC-ES-MS/MS) were used to detect and identify intermediates excreted transiently during the aerobic degradation of linear alkylbenzenesulfonates(LAS) in fixed-bed bioreactors(FBBR). The inoculum for the FBBR was the microflora of the River Rhine, Germany. Two major phenomena were observed on the addition of 100 mg/L LAS to the system, sorption and then Biodegradation. Disappearance due to sorption was followed in an inhibited FBBR. Biodegradation of LAS started on day 7 and Was accompanied by the transient excretion of intermediates, which were later largely degraded.