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首页> 外文期刊>RSC Advances >A new approach for pyrene bioremediation using bacteria immobilized in layer-by-layer assembled microcapsules: dynamics of soil bacterial community
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A new approach for pyrene bioremediation using bacteria immobilized in layer-by-layer assembled microcapsules: dynamics of soil bacterial community

机译：逐层组装微胶囊中固定的细菌的一种新方法：土壤细菌群落的动态

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摘要

This study reports on the enhanced bioremediation of pyrene (PYR)-contaminated soil resulting from organisms immobilized in layer-by-layer (LBL) assembled microcapsules. The characterization by microscopy indicated that the shape of the microcapsule was like a flake with a diameter of 3-4 mm and that bacteria were encapsulated in the microcapsules. Soil remediation experiments revealed that PYR with an initial concentration of 100 mg kg(-1) in dry soil could be 81% removed by an immobilized consortium (10(7) CFU g(-1) in dry soil) in 40 days, while only 42% was removed by the free bacteria. Moreover, the LBL-immobilized cells could cause a significant increase in the biodiversity of the bacterial community, soil enzyme activity and the number of PYR-degrading bacteria in the soil, successfully accounting for accelerated PYR removal. Illumina MiSeq sequencing results showed that Proteobacteria and Actinobacteria were observed as the predominant groups during bioremediation in the LBL groups. The active uncultured bacteria belonged to Xanthomonadaceae, Planococcaceae, Pseudomonas, Mycobacterium, Sphingomonadaceae, Acinetobacter, Flavobacterium, Comamonadaceae, Bacillus, Sphingobacterium, Enterobacteriaceae, and Streptomyces, the latter two classes having rarely been associated with PAH-degrading activity. The results indicated that the LBL microcapsule treatment might be a potential bacteria immobilization option for soil bioremediation.
机译：从固定在层 - 层（LBL）组装的微胶囊的生物体产生的芘（PYR）-contaminated土壤的生物治理增强本研究报告。通过显微镜表征表明，微胶囊的形状就像一个直径为3-4毫米的薄片，并且细菌包封在微胶囊中。土壤修复实验表明，与PYR的初始浓度100毫克公斤（-1）在干燥土壤中40天（在干燥的土壤10（7）CFU克（-1））的固定化财团可以81％除去，而由游离的细菌只能除去42％。此外，LBL固定化细胞可以引起细菌群落，土壤酶活性的生物多样性显著上升和PYR降解菌在土壤中的数量，成功占加速PYR去除。 Illumina的MiSeq测序结果表明变形菌门和放线菌中观察到作为主要基团在LBL组生物修复期间。活性未培养的细菌属于Xanthomonadaceae，Planococcaceae，假单胞菌属，分枝杆菌属，Sphingomonadaceae，不动杆菌属，黄杆菌属，Comamonadaceae，芽孢杆菌属，鞘氨醇杆菌，肠杆菌科和链霉菌属，具有很少被与PAH降解活性相关联的后两个类。结果表明，该LBL微胶囊的治疗可能是土壤生物修复潜在的细菌固定选项。

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  • 来源
    《RSC Advances》 |2016年第25期|共10页
  • 作者

    Deng Fucai; Liao Changjun; Yang Chen; Guo Chuling; Ma Lin; Dang Zhi;

  • 作者单位

    S China Univ Technol Sch Environm &

    Energy Guangzhou 510006 Guangdong Peoples R China;

    S China Univ Technol Sch Environm &

    Energy Guangzhou 510006 Guangdong Peoples R China;

    S China Univ Technol Sch Environm &

    Energy Guangzhou 510006 Guangdong Peoples R China;

    S China Univ Technol Sch Environm &

    Energy Guangzhou 510006 Guangdong Peoples R China;

    S China Univ Technol Sch Environm &

    Energy Guangzhou 510006 Guangdong Peoples R China;

    S China Univ Technol Sch Environm &

    Energy Guangzhou 510006 Guangdong Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学;
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