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.

Italy, Science & research, Sewage Systems, Sewage Treatment Facilities, Sewerage systems, Brief Article, Sewer systems, Sewage sludge

---

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.

Research and Development in the Physical, Engineering, and Life Sciences, Analytical Laboratory Instrument Manufacturing, Analytical instruments, Pollution R&D NEC, Mass Spectrometers, Linear Alcohol Ethoxylates, Liquid Chromatographs, Usage, Pollution control research, Liquid chromatography, Mass spectrometry, Linear alcohols, Nonionic surfactants

---

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.

Environmental aspects, Alkylates, Alkylates (Petroleum derivatives)

Similar abstracts:

• Abstracts: Speciation of uranium in Fernald soils by molecular spectroscopic methods: characterization of untreated soils
• Abstracts: Electrochemical and spectroscopic study of arsenate removal from water using zero-valent iron media. Removal of MTBE and other organic contaminants from water by sorption to high silica zeolites
• Abstracts: Effects of humic acids on the photoinduced reduction of U(VI) in the presence of semiconducting TiO2 particles
• Abstracts: Implications of aqueous silica sorption to iron hydroxide: mobilization of iron colloids and interference with sorption of arsenate and humic substances

This website is not affiliated with document authors or copyright owners. This page is provided for informational purposes only. Unintentional errors are possible.