荧蒽
生物降解
壳聚糖
生物修复
环境修复
化学
环境化学
细菌
微生物
污染
微生物学
有机化学
菲
生物
生态学
遗传学
作者
Anuska Conde Fagundes Soares Garcia,Bruno Rafael Araújo,Willian Garcia Birolli,Carla Guinart Marques,Leandro Eugênio Cardamone Diniz,Amanda Pires Barbosa,André Luiz Meleiro Porto,Luciane Pimenta Cruz Romão
标识
DOI:10.1007/s12010-019-02980-9
摘要
The intensive production of polycyclic aromatic hydrocarbons by anthropogenic activities is a serious environmental problem. Therefore, new bioremediation methods are required to avoid widespread contamination. In this work, Serratia sp. AC-11 strain isolated from a tropical peat was selected for immobilization into chitosan beads, which were employed in the biodegradation of fluoranthene. The sizes of the produced beads were relatively uniform with an average diameter of 3 mm. The material was characterized by SEM and FT-IR, confirming the cells immobilization and the protective barrier formed by the chitosan surrounding the biomass. The immobilized bacteria were able to degrade 56% of fluoranthene (the initial concentration was 100 mg L-1) in just 1 day at twice the degradation rate achieved by free-living cells. Furthermore, the immobilized bacteria showed excellent removal during five reuse cycles, from 76% to 59% of biodegradation. These results showed the potential of this approach for remediation of contaminated sites.
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