Occurrence and abundance of dicarboxylated metabolites of nonylphenol polyethoxylate surfactants in treated sewages
Article Abstract:
Researchers from Italy analyzed the monthly data of dicarboxylated metabolites of nonylphenol polyethoxylate surfactants from five sludge sewage treatment plants.
Publication Name: Environmental Science & Technology
Subject: Science and technology
ISSN: 0013-936X
Year: 2000
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Liquid chromatography-electrospray-mass spectrometry as a valuable tool for characterizing biodegradation intermediates of branched alcohol ethoxylate surfactants
Article Abstract:
Liquid chromatography/electrospray/mass spectrometry proved useful in characterizing the biodegradation intermediates of branched alcohol ethoxylate (AEs) surfactants. The characterization of the metabolite structures was achieved through in-source collision-induced decomposition spectra. Results revealed that ethoxy chain was either shortened or oxidized by a bacterial attack and a simultaneous attack of both alkyl chains by the beta-oxidation process becomes a minor iodegradation route.
Publication Name: Environmental Science & Technology
Subject: Science and technology
ISSN: 0013-936X
Year: 1998
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Characterization of recalcitrant intermediates from biotransformation of the branched alkyl side chain of nonylphenol ethoxylate surfactants
Article Abstract:
Experiments on the ultimate fate of nonylphenol polyethoxylates (A9PEs) shows that more extensively alkyl branched A9PE chains disappeared after three months while a more persistent A9PECs with both side chains oxidized (CAPEC) remain. Tests used chromatography-electrospray-mass spectrometry to elucidate structures produced and finds that the resulting CAPECs were extremely recalcitrant to further biotransformation and that they amounted to 63% of the total A9PE metabolites remaining.
Publication Name: Environmental Science & Technology
Subject: Science and technology
ISSN: 0013-936X
Year: 1998
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