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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
chemical engineering
Triclosan susceptibility and co-metabolism - A comparison for three aerobic pollutant-degrading bacteria
Bioresource Technology, Volume 102, No. 3, Year 2011
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Description
The antimicrobial agent triclosan is an emerging and persistent environmental pollutant. This study evaluated the susceptibility and biodegradation potential of triclosan by three bacterial strains (Sphingomonas wittichii RW1, Burkholderia xenovorans LB400 and Sphingomonas sp. PH-07) that are able to degrade aromatic pollutants (dibenzofuran, biphenyl and diphenyl ether, respectively) with structural similarities to triclosan. These strains showed less susceptibility to triclosan when grown in complex and mineral salts media. Biodegradation experiments revealed that only strain PH-07 was able to catabolize triclosan to intermediates that included hydroxylated compounds (monohydroxy-triclosan, and dihydroxy-triclosan) and the ether bond cleavage products (4-chlorophenol and 2,4-dichlorophenol), indicating that the initial dihydroxylation occurred on both aromatic rings of triclosan. Additional growth inhibition tests demonstrated that the main intermediate, 2,4-dichlorophenol, was less toxic to strain PH-07 than was triclosan. Our results indicate that ether bond cleavage might be the primary mechanism of avoiding triclosan toxicity by this strain. © 2010 Elsevier Ltd.
Authors & Co-Authors
Kim, Young Mo
South Korea, Pohang
Pohang University of Science and Technology
United States, Richland
Pacific Northwest National Laboratory
Murugesan, Kumarasamy
South Korea, Pohang
Pohang University of Science and Technology
Schmidt, Stefan
South Africa, Durban
University of Kwazulu-natal
Bokare, Varima
South Korea, Pohang
Pohang University of Science and Technology
Jeon, Jong Rok
South Korea, Pohang
Pohang University of Science and Technology
Kim, Eun Ju
South Korea, Pohang
Pohang University of Science and Technology
Yoon-Seok, Chang
South Korea, Pohang
Pohang University of Science and Technology
Statistics
Citations: 118
Authors: 7
Affiliations: 3
Identifiers
Doi:
10.1016/j.biortech.2010.10.009
ISSN:
09608524
Research Areas
Environmental