Bio-degradation of 2-naphthol and its metabolites by coupling Aspergillus niger with Bacillus subtilis
查看参考文献27篇
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文摘
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To explore biodegradation of 2-naphthol and its metabolites accumulated in wastewater treatment, a series of bio-degradation experiments were conducted. Two main metabolites of 2-naphthol, 1,2-naphthalene-diol and 1,2-naphthoquinone, were identified by high-performance liquid chromatography with standards. Combining fungus Aspergillus niger with bacterium Bacillus subtilis in the treatment enhanced 2-naphthol degradation efficiency, lowered the accumulation of the two toxic metabolites. There were two main phases during the degradation process by the kinetic analysis: 2-naphthol was first partly degraded by the fungus, producing labile and easily accumulated metabolites, and then the metabolites were mainly degraded by the bacterium, attested by the degradation processes of 1,2-naphthalene-diol and 1,2-naphthoquinone as sole source of carbon and energy. Sodium succinate, as a co-metabolic substrate, was the most suitable compound for the continuous degradation. The optimum concentration of 2-naphthol was 50 mg/L. The overall 2-naphthol degradation rate was 92%, and the COD_(Cr) removal rate was 80% on the 10th day. These results indicated that high degradation rate of 2-naphthol should not be considered as the sole desirable criterion for the bioremediation of 2-naphthol-contaminated soils/wastewater because some of its accumulated metabolites still have severe health risks to human. |
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来源
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Journal of Environmental Sciences
,2010,22(5):669-674 【核心库】
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DOI
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10.1016/s1001-0742(09)60161-3
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关键词
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2-naphthol
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metabolites
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identify
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continuous degradation
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accumulation
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地址
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1.
Institute of Geochemistry, Chinese Academy of Sciences, State Key Laboratory of Environmental Geochemistry, Chinese Academy of Sciences, Guiyang, 550002
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Shenyang Institute of Cemical Technology, Shenyang, 110142
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语种
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英文 |
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文献类型
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研究性论文 |
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ISSN
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1001-0742 |
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学科
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社会与环境 |
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基金
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国家自然科学基金
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国家自然科学基金
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中国博士后科学基金
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Guizhou Provincial Foundation for Science and Teaching Talents Program
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文献收藏号
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CSCD:3902637
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