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

查看全文 作　　者：Shuyan [1,2]Zang;Bin [1]Lian;Juan [2]Wang;Yanjie [2]Yang

机构地区：[1]State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China;[2]Shenyang Institute of Chemical Technology, Shenyang 110142, China

出　　处：《Journal of Environmental Sciences》索引2010年第22卷第5期,共6页

基　　金：supported by the National Science Fundation for Innovative Research Group (No. 40721002);the National Natural Science Foundation of China (No.40803037);the China Post doctoral Science Foundation(No. 20080440809);the Guizhou Provincial Foundation for Science and Teaching Talents Program (No.2005-356) 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 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-naphtholcontaminated soils/wastewater. 关键词：枯草芽孢杆菌代谢物黑曲霉萘酚解耦合生物降解实验废水处理代谢产物

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

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