期刊
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
卷 21, 期 4, 页码 2724-2732出版社
SPRINGER HEIDELBERG
DOI: 10.1007/s11356-013-2221-9
关键词
Pyrene; Biodegradation; Acinetobacter USTB-X; Biosurfactants; 1-Hydroxypyrene; Metabolite
资金
- International Joint Key Project from Chinese Ministry of Science and Technology [2010DFB23160]
- International Joint Key Project from National Natural Science Foundation of China [40920134003]
- National Natural Science Foundation of China [41273092]
- National Outstanding Youth Research Foundation of China [40925010]
The pryene-degradation bacterium strain USTB-X was newly isolated from the polycyclic aromatic hydrocarbon (PAH)-contaminated soil in Beijing Coking Plant, China. The strain was identified as Acinetobacter with respect to its 16S rDNA and morphological and physiological characteristics. The strain was Gram-negative, non-mobile, non-acid-fast, and non-spore-forming, short rods in young culture and 0.8-1.6 mu m in diameter and 1.2-2.5 mu m long in the stationary phase of growth. Strain USTB-X could utilize pyrene, naphthalene, fluorene, phenanthrene, benzene, toluene, ethylbenzene, ethanol, methanol, and Tween 80 as sole source of carbon and energy. The strain could produce biosurfactants which enhanced the removal of pyrene and could remove 63 % of pyrene with an initial concentration of 100 mg.L-1 in 16 days without other substrates. Based on the intermediates analyzed by gas chromatography-mass spectrometry, we also deduced the possible metabolic pathway of strain USTB-X for pyrene biodegradation. Results indicated that the strain USTB-X had high potential to enhance the removal of PAHs in contaminated sites.
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