期刊
INTERNATIONAL BIODETERIORATION & BIODEGRADATION
卷 65, 期 6, 页码 818-826出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ibiod.2011.05.005
关键词
Phthalate esters; Organic-solvent-tolerant bacteria; Biodegradation; Concurrent biodegradation; Endocrine-disruptor
资金
- Asahi Glass Foundation
- National Research University [FW 008B]
- Thai Government Stimulus Package 2 [TKK2555]
The contamination and distribution of phthalate esters - synthetic compounds widely used in plastic product production, including food and medical packaging - has raised safety concerns due to their endocrine-disrupting activity and mandated to be treated. Bacillus subtilis strain 3C3, isolated as an organic-solvent-tolerant bacterium, was capable of utilizing diethyl phthalate as a sole carbon source. Biodegradation of diethyl phthalate occurred constitutively without lag period, and its kinetics followed a first-order model. The biodegradability was significantly enhanced with the supplementation of yeast extract as a co-metabolic substrate. In the presence of Tween-80 as a solubilizing agent, cells rapidly degrade a range of short-chain phthalate esters at high concentrations (up to 1000 mg l(-1) for diethyl phthalate). The biodegradation of short-chain phthalates in the binary, ternary and quaternary substrate system revealed that the coexistence of other short-chain phthalates had no significant influence on the biodegradation of diethyl phthalate, and vice versa. These results substantiated that B. subtilis strain 3C3 has potential application as a bioaugmented bacterial culture for bioremediation of phthalates. (C) 2011 Elsevier Ltd. All rights reserved.
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