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The biosolubilization of lignite by Bacillus sp. Y7 and characterization of the soluble products

机译：芽孢杆菌对褐煤的生物增溶作用。 Y7和可溶性产物的表征

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摘要

The biosolubilization of lignite is a promising technology for converting these low rank coals into value-added products, such as humic acid (HA), and the development of this technology has received increasing attention. In this study, Bacillus sp. Y7 was isolated from weathered lignite minerals and was shown to have effective solubilization activity on untreated Chinese lignite. More than 36.77% of the untreated Chinese lignite could be solubilized in 12 days. The lignite solubilization ability of Bacillus sp. Y7 correlated with an increase in pH, and an analysis of the extracellular substances produced by Y7 suggested that thermostable, extracellular alkaline materials in the culture were the principal factors responsible for lignite solubilization. The structure of these materials was protein-like, and V_(n-h). v_c=o and δ_(N-H) were the main functional groups related to lignite solubilization. Micro-FTIR, NMR and elemental analyses were performed to characterize the solubilization residues and bacterial-transformed lignite humic acid (bHA) produced. Data analysis led to the conclusion that Bacillus sp. Y7 could depolymerize the non-hydrocarbon component of lignite and form bHA. The structure of bHA was similar to that of HA extracted by chemical processes from lignite but had higher N/O and H/C atomic ratios than HA.
机译：褐煤的生物增溶是将这些低品位煤转化为增值产品（例如腐殖酸（HA））的有前途的技术，并且该技术的发展受到越来越多的关注。在这项研究中，芽孢杆菌属。 Y7是从风化的褐煤矿物中分离出来的，并且对未处理的中国褐煤具有有效的增溶活性。在12天内，超过36.77％的未经处理的中国褐煤可以溶解。芽孢杆菌的褐煤增溶能力。 Y7与pH的升高相关，对Y7产生的细胞外物质的分析表明，培养物中热稳定的细胞外碱性物质是褐煤增溶的主要因素。这些材料的结构是蛋白质样的，V_（n-h）。 v_c = o和δ_（N-H）是与褐煤增溶有关的主要官能团。进行了Micro-FTIR，NMR和元素分析，以表征增溶残留物和产生的细菌转化褐煤腐殖酸（bHA）。数据分析得出的结论是芽孢杆菌。 Y7可以使褐煤的非烃组分解聚并形成bHA。 bHA的结构类似于通过化学工艺从褐煤中提取的HA的结构，但N / O和H / C原子比比HA高。

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  • 来源
    《Fuel》 |2013年第1期|639-645|共7页
  • 作者

    Feng Jiang; Zhaohu Li; Zhiwei Lv; Tongguo Gao; Jinshui Yang; Zhaohai Qin; Hongli Yuan;

  • 作者单位

    State Key Laboratory of Agrobiotechnology, College of Biological Sciences, China Agricultural University, Beijing 100193, China,College of Agronomy and Biotechnology, China Agricultural University, Beijing 100193, China;

    College of Agronomy and Biotechnology, China Agricultural University, Beijing 100193, China;

    State Key Laboratory of Agrobiotechnology, College of Biological Sciences, China Agricultural University, Beijing 100193, China;

    State Key Laboratory of Agrobiotechnology, College of Biological Sciences, China Agricultural University, Beijing 100193, China;

    State Key Laboratory of Agrobiotechnology, College of Biological Sciences, China Agricultural University, Beijing 100193, China;

    College of Science, China Agricultural University, Beijing 100193, China;

    State Key Laboratory of Agrobiotechnology, College of Biological Sciences, China Agricultural University, Beijing 100193, China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    lignite; biosolubilization; humic acid; bacillus sp.;

    机译：褐煤;生物增溶腐植酸;芽孢杆菌;

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