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首页> 外文期刊>Ecotoxicology and Environmental Safety >Characterization of an Hg(Ⅱ)-volatilizing Pseudomonas sp. strain, DC-B1, and its potential for soil remediation when combined with biochar amendment
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Characterization of an Hg(Ⅱ)-volatilizing Pseudomonas sp. strain, DC-B1, and its potential for soil remediation when combined with biochar amendment

机译：Hg（Ⅱ）挥发型假单胞菌的表征与生物炭改良剂联合使用时，DC-B1菌株及其土壤修复潜力

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摘要

Hg contamination is a critical environmental problem, and its remediation using cost-effective and environmentally friendly methods is highly desirable. In this study, a multi-metal-resistant bacterium showing strong Hg(II) volatilization ability, Pseudomonas sp. DC-B1, was isolated from heavy metal-contaminated soils. DC-B1 volatilized 81.1%, 79.2% and 74.3% of the initial Hg(2+)from culture solutions with initial Hg(2+)concentrations of 5.1, 10.4, and 15.7 mg/L, respectively, within 24 h. Microcosm experiments were performed to investigate the remediation of Hg(II)-spiked soils inoculated with DC-B1 coupled with sawdust biochar amendment. The efficiency of Hg removal from two types of soil samples with different properties and an initial Hg(II) content of approximately 100 mg/kg was enhanced 5.7-13.1% by bio-augmentation with inoculation of the bacterial strain DC-B1, 5.4-10.7% by amendment of 4% (w/w) biochar, and 10.7-23.2% by the combination of DC-B1 and biochar amendments over an incubation period of 24 d over the efficiency in the control treatment under flooded conditions. Longer root lengths were observed in lettuce grown in the treated soils than in lettuce from the control soil, confirming the bioremediation efficacy of the two bioagents for soil Hg contamination.
机译：汞污染是一个关键的环境问题，非常需要使用经济高效且环境友好的方法对其进行补救。在这项研究中，显示出强大的Hg（II）挥发能力的多金属抗性细菌Pseudomonas sp.。 DC-B1是从重金属污染的土壤中分离出来的。 DC-B1在24小时内从培养液中蒸发了初始Hg（2+）浓度的初始Hg（2+）的81.1％，79.2％和74.3％，分别为5.1、10.4和15.7 mg / L。进行了微观实验，研究了接种DC-B1和木屑生物炭改良剂的Hg（II）加标土壤的修复。通过接种细菌菌株DC-B1，5.4-进行生物增强，从两种性质不同且初始Hg（II）含量约为100 mg / kg的土壤样品中去除Hg的效率提高了5.7-13.1％。在淹没条件下，经过24 d的温育期，经过4 d（w / w）生物炭修正的比例为10.7％，通过DC-B1和生物炭修正剂的组合比例为10.7-23.2％。在处理过的土壤中生长的莴苣中观察到的根长比对照土壤中的莴苣中的根长长，这证实了两种生物剂对土壤汞污染的生物修复功效。

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  • 来源
    《Ecotoxicology and Environmental Safety》 |2018年第11期|172-179|共8页
  • 作者

    Chen Jinquan; Dong Jia; Chang Junjun; Guo Tongtong; Yang Qingchen; Jia Wei; Shen Shili;

  • 作者单位

    Yunnan Univ, Sch Ecol & Environm Sci, Kunming 650091, Yunnan, Peoples R China;

    Yunnan Univ, Sch Ecol & Environm Sci, Kunming 650091, Yunnan, Peoples R China;

    Yunnan Univ, Sch Ecol & Environm Sci, Kunming 650091, Yunnan, Peoples R China;

    Yunnan Univ, Inst Int Rivers & Ecosecur, Kunming 650091, Yunnan, Peoples R China;

    Yunnan Univ, Inst Int Rivers & Ecosecur, Kunming 650091, Yunnan, Peoples R China;

    Yunnan Univ, Sch Architecture & Planning, Kunming 650091, Yunnan, Peoples R China;

    Yunnan Univ, Sch Ecol & Environm Sci, Kunming 650091, Yunnan, Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Hg-resistant bacteria; Pseudomonas; Hg volatilization; Hg removal; Biochar; Lettuce;

    机译：耐汞细菌;假单胞菌;汞挥发;除汞;生物炭;莴苣;

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