Degradation behaviors of nonylphenol ethoxylates by isolated bacteria using improved isolation method
Author(s): GU Xin, ZHANG Yu, ZHANG Jing, YANG Min, Hideyuki Tamaki, Yoichi Kamagata
Pages: 1025-1027
Year: 2008 Issue: 9
Journal: JOURNAL OF ENVIRONMENTAL SCIENCES
Keyword: nonylphenol ethoxylate (NPEO); biodegradation; ssolation 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.
Pages: 1025-1027
Year: 2008 Issue: 9
Journal: JOURNAL OF ENVIRONMENTAL SCIENCES
Keyword: nonylphenol ethoxylate (NPEO); biodegradation; ssolation 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.
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