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Biodegradation of a Phthalate Plasticizer, Di-Isononyl Phthalate (DINP), by Sphingobium chungbukense

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In this study, di-isononyl phthalate (DINP) was efficiently degraded by Sphingobium chungbukense KCTC 2955. The optimal conditions for DINP (100 mg L−1) degradation by S. chungbukense in a mineral salts medium were found to be pH 7.0, 30°C, and stirring at 200 rpm. The maximum specific rate of DINP degradation was found to be concentration dependent, with a maximum of 4.12 mg DINP L−1 h−1. DINP was transformed rapidly by S. chungbukense, with the formation of monoisononyl phthalate (MIP) and phthalic acid, which subsequently degraded further. These results highlight the potential of this bacterium for removing DINP-contaminated waste in the environment.

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This study was supported by a 2007 research grant from Chungbuk National University.

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Correspondence to Jiho Min or Yang-Hoon Kim.

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Jae-Min Park and Miri Jeon contributed equally to this work.

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Park, JM., Jeon, M., Lim, ES. et al. Biodegradation of a Phthalate Plasticizer, Di-Isononyl Phthalate (DINP), by Sphingobium chungbukense . Curr Microbiol 57, 515–518 (2008).

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