Degradation behaviors of nonylphenol ethoxylates by isolated bacteria usingimproved isolation method
GU Xin , ZHANG Yu , ZHANG Jing , YANG Min , Hideyuki Tamaki , Yoichi Kamagata
DOI:
Received May 21, 2008,Revised July 23, 2008, Accepted , Available online
Volume 20,2008,Pages 1025-1027
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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.
