A central fission pathway in alkylphenol ethoxylate biodegradation

Adsorption of aqueous alkylphenol ethoxylate surfactants by mesoporous carbon CMK-3

“…A variety of treatment methods, including advanced oxidation processes (AOPs), biodegradation, and adsorption, have been attempted to eliminate alkylphenol ethoxylates-related pollution from aquatic environments [8,[12][13][14][15][16][17]. The biodegradation of aqueous APE was found to be initialized by a shortening of the EO chain, leading to the generation of APE with a short EO chain (one or two EO units) [8,14].…”

“…The biodegradation of aqueous APE was found to be initialized by a shortening of the EO chain, leading to the generation of APE with a short EO chain (one or two EO units) [8,14]. Advanced oxidation processes, such as photocatalytic degradation and ultrasonic irradiation, are based on the mechanism of radical oxidation.…”

Fate of nonylphenol compounds in the treatment of simulated denim wastewater

“…The second theory suggests that the EO unit will be removed without the production of corresponding NPECs in anaerobic unit [30]. The third theory states that the breakage of EO chain would take place in the middle of the molecule, which results in the production of low molecular weight NPEOs [31]. The detection of substantial low molecular weight NPECs in the effluent indicates that the results are in a better accordance with the first theory than the other two.…”

Efficacious syntheses of alkylphenol ethoxylates and ethoxycarboxylates with long and single length PEG chain and their application to environmental fate study

“…14) Endo-fission is usually called central fission and the ether bond of the PEG chain is randomly cleaved. 15) If we use commercial APEO as the substrate, we cannot distinguish the starting substrate and the corresponding product on the chromatogram; however, this discrimination between central fission and exo-fission can be achieved quite easily using APkEO with long and single length PEG chain. For example, Pseudomonas putida S-5 isolated from a paddy field was fed pure OP10EO as the sole carbon source to study its degradation mechanism.…”