title: Degradation behaviors of nonylphenol ethoxylates by isolated bacteria using improved isolation method.
abstract: Nonylphenol ethoxylate (NPEO)-degrading bacteria were isolated from activated sludge using an improved isolation method, and the corresponding degradation behaviours were investigated. Eight NPEO-degrading strains distributed in genera Pseudomonas, Sphingomonas, Sphingobium, Cupriavidus, Ralstonia, Achromobacter, and Staphylococcus were acquired. The latter five genera have never been reported for the degradation of NPEOs. Four degradation patterns were observed for the eight pure strains. In pattern A, NPEOs were converted to short-chain NPEOs and carboxylated products, while in pattern B, lower ethoxylated oligomers appeared. Nonylphenol monoethoxylate was the main product in pattern C, while in pattern D ethoxylated units was oxidized but not shortened. Pattern C and D have not yet been reported.
authors.affiliation: State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China. bpguxin@gmail.com
authors.forename: Xin
authors.initials: X
authors.lastname: Gu
authors.forename: Yu
authors.initials: Y
authors.lastname: Zhang
authors.forename: Jing
authors.initials: J
authors.lastname: Zhang
authors.forename: Min
authors.initials: M
authors.lastname: Yang
authors.forename: Hideyuki
authors.initials: H
authors.lastname: Tamaki
authors.forename: Yoichi
authors.initials: Y
authors.lastname: Kamagata
mesh_terms: D001419:Bacteria / Q000235:genetics / Q000378:metabolism*; D001673:Biodegradation, Environmental; D004785:Environmental Pollutants / Q000737:chemistry / Q000378:metabolism; D010636:Phenols / Q000737:chemistry / Q000378:metabolism*; D010802:Phylogeny
chemical_list: D004785:Environmental Pollutants; D010636:Phenols