Starch-enhanced degradation of HMW PAHs by Fusarium sp in an aged polluted soil from a coal mining area

文献类型: 外文期刊

第一作者: Zhao, Ou-ya

作者: Zhao, Ou-ya;Zhang, Xue-na;Feng, Sheng-Dong;Zhang, Li-Xiu;Shi, Wei;Yang, Zhi-xin;Chena, Miao-Miao;Fanga, Xue-Dan;Zhao, Ou-ya;Zhang, Xue-na;Feng, Sheng-Dong;Zhang, Li-Xiu;Shi, Wei;Yang, Zhi-xin;Chena, Miao-Miao;Fanga, Xue-Dan;Zhao, Ou-ya

作者机构:

关键词: HMW PAHs;Bioremediation;Fusarium sp.;Starch;Polyphenol oxidase activities

期刊名称:CHEMOSPHERE ( 影响因子:7.086; 五年影响因子:6.956 )

ISSN:

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收录情况: SCI

摘要: The present study used strain ZH-H2 (Fusarium sp.) isolated by our group as the PAH-degrading strain and 5-6-rings PAHs as degradation objects. The soil incubation experiment was carried out to investigate the starch-enhanced degradation effects of HMW PAHs by Fusarium sp. in an Aged Polluted Soil from a Coal Mining Area. The results showed that the removal rates of BaP, InP and BghiP increased with increasing inoculation rate of ZH-H2 in the unsterile aged polluted soil of coal mining area, with the exception of BbF degradation which increased in the H2 treatment and then decreased. Different addition dosage of starch apparently resulted in degradation of 4 PAHs in soil, with removal rates of 14.47% for BaP, 23.83% for DbA, 30.77% for BghiP and 31.00% for InP obtained with treatment D2, respectively higher than in treatment Dl. So starch addition apparently enhanced the degradation of the 4 PAHs, especially InP and BghiP, by native microbes in the aged HMW PAH-polluted soil. By adding starch to these aged polluted soils with inoculated strain ZH-H2, HMW-PAHs degradation was further improved and addition of 0.5 g kg(-1) starch to soils with 1.0 g kg(-1) Fusarium ZH-H2 (D-2 + H-2) performed best to the 4 HMW-PAHs in all of these combination treatments by a factor of up to 3.09, depending on the PAH. We found that the highest polyphenol oxidase activities under D-2 + H-2 treatments are consistent with the results of removal rates of 4 PAHs. Our findings suggest that the combination of Fusarium sp. ZH-H2 and starch offers a suitable alternative for bioremediation of aged PAH-contaminated soil in coal mining areas, with a recommended inoculation size of 0.5 g Fusarium sp. ZH-H2 and addition of 0.5 g kg(-1) starch per kg soil. (C) 2016 Published by Elsevier Ltd.

分类号: X5

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