Biodegradation of 2-naphthol and its metabolites by coupling Aspergillus niger with Bacillus subtilis

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	Biodegradation of 2-naphthol and its metabolites by coupling Aspergillus niger with Bacillus subtilis
其他题名	Biodegradation of 2-naphthol and its metabolites by coupling Aspergillus niger with Bacillus subtilis
	Zang Shuyan 1; Lian Bin 1; Wang Juan 2; Yang Yanjie 2
	2010
发表期刊	JOURNAL OF ENVIRONMENTAL SCIENCES
ISSN	1001-0742
卷号	22 期号:5 页码:669-674
摘要	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 CODCr removal rate was 80% on day 10. 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.
其他摘要	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.
关键词	POLYCYCLIC AROMATIC-HYDROCARBONS DEGRADATION PHENANTHRENE SOIL REMOVAL PHASE WATER TIO2 2-naphthol metabolites identify continuous degradation accumulation
收录类别	CSCD
语种	英语
资助项目	[National Science Fundation for Innovative Research Group] ; [National Natural Science Foundation of China] ; [China Postdoctoral Science Foundation] ; [Guizhou Provincial Foundation for Science and Teaching Talents Program]
CSCD记录号	CSCD:3902637
引用统计	被引频次：3[CSCD] [CSCD记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/154597
专题	中国科学院金属研究所
作者单位	1.中国科学院 2.中国科学院金属研究所
推荐引用方式 GB/T 7714	Zang Shuyan,Lian Bin,Wang Juan,et al. Biodegradation of 2-naphthol and its metabolites by coupling Aspergillus niger with Bacillus subtilis[J]. JOURNAL OF ENVIRONMENTAL SCIENCES,2010,22(5):669-674.
APA	Zang Shuyan,Lian Bin,Wang Juan,&Yang Yanjie.(2010).Biodegradation of 2-naphthol and its metabolites by coupling Aspergillus niger with Bacillus subtilis.JOURNAL OF ENVIRONMENTAL SCIENCES,22(5),669-674.
MLA	Zang Shuyan,et al."Biodegradation of 2-naphthol and its metabolites by coupling Aspergillus niger with Bacillus subtilis".JOURNAL OF ENVIRONMENTAL SCIENCES 22.5(2010):669-674.