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Enhanced microbial degradation of humin-bound phenanthrene in a two-liquid-phase system

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dc.contributor.author Yinping Zhang, Fang Wang, Congying Wang, Qing Hong, Fredrick Orori Kengara, Tao Wang, Yang Song, Xin Jiang
dc.date.accessioned 2020-08-17T12:32:54Z
dc.date.available 2020-08-17T12:32:54Z
dc.date.issued 2011-02-28
dc.identifier.citation 14 en_US
dc.identifier.uri https://repository.maseno.ac.ke/handle/123456789/2164
dc.description The article can be accessed in full via;https://www.sciencedirect.com en_US
dc.description.abstract Humin, the main component of soil organic matter, greatly influences the nonlinear sorption and desorption hysteresis of polycyclic aromatic hydrocarbons (PAHs) in soil. However, little is known about the bioavailability of PAHs bound to humin. In the present study, a phenanthrene (PHE)-degrading bacterial strain – PHE9 – was isolated and identified as the genus Micrococcus. It was used to investigate the degradation of humin-bound PHE and PHE not bound to humin (non-humin PHE) in liquid mineral medium (MM) and in a two-liquid-phase system (TLPs). The results showed that in MM, about 66.84% of humin-bound PHE was degraded after 49 days, whereas almost all the non-humin PHE was degraded after 27 days. Compared to MM, the TLPs showed a much better efficacy in the removal of PHE, especially for humin-bound PHE: more than 97.28% of non-humin PHE was degraded in 11 days and over 85.62% of humin-bound PHE was degraded in 32 days. It could be concluded that most of humin-bound PHE could be degraded in the MM although humin decreased the bioavailability of PHE, whereas the application of TLPs could enhance the biodegradation of humin-bound PHE. en_US
dc.publisher Elsevier en_US
dc.subject Polycyclic aromatic hydrocarbons (PAHs);Biodegradation;Micrococcus sp;Humin;Two-liquid-phase system en_US
dc.title Enhanced microbial degradation of humin-bound phenanthrene in a two-liquid-phase system en_US
dc.type Article en_US


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