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首页> 外文期刊>Journal of Hazardous Materials >Mitigation measures for chromium-Ⅵ contaminated groundwater - The role of endophytic bacteria in rhizofiltration
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Mitigation measures for chromium-Ⅵ contaminated groundwater - The role of endophytic bacteria in rhizofiltration

机译：六价铬污染的地下水的缓解措施-内生细菌在根际过滤中的作用

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摘要

A constructed wetland pilot with Juncus acutus L. plants was investigated for its rhizofiltration efficiency in treating Cr(Ⅵ)-contaminated groundwater. Measurements of Cr(Ⅵ) and total Cr were performed to estimate the rate of removal. In addition, Cr concentration in plant tissues was measured and the role of endophytic bacteria on plant's tolerance to Cr(Ⅵ) toxicity was investigated. The results support that J. acutus is able to rhizofiltrate Cr(Ⅵ) from contaminated water with up to 140μg/L while Cr content analysis in plant tissues revealed that the majority of Cr was accumulated by the plants. Moreover, two leaf (Acidovorax sp. strain U3 and Ralstonia sp. strain U36) isolated endophytic bacteria were found to tolerated 100mg/L Cr(Ⅵ) while nine root isolates showed resistance to 500mg/L Cr(Ⅵ). The endophytic bacteria Pseudomonas sp. strain R16 and Ochrobactrum sp. strain R24 were chosen for Cr(Ⅵ) reduction assays. All four strains exhibited a strong potential to reduce Cr(Ⅵ) to Cr(Ⅲ) aerobically. Among them Pseudomonas sp. strain R16 was found able to completely reduced 100mg/L Cr(Ⅵ) after 150h of incubation. These results suggest that J. acutus is an excellent choice for CWs whose function is the removal of Cr(Ⅵ) from contaminated groundwater for subsequent use in crop irrigation.
机译：研究了一个人工种植的湿地试验与Jun草植物在处理受Cr（Ⅵ）污染的地下水中的根际过滤效率。进行Cr（Ⅵ）和总Cr的测量以估算去除率。此外，还测量了植物组织中的Cr浓度，并研究了内生细菌对植物对Cr（Ⅵ）毒性的耐受性。结果表明，金丝桃能够从污染水中根除氟（最高可达140μg/ L），而植物组织中的铬含量分析表明，大部分铬是由植物积累的。此外，发现两片分离的内生细菌（Acidovorax sp。U3菌株和Ralstonia sp。U36菌株）能耐受100mg / L Cr（Ⅵ），而九种根系菌株对500mg / L Cr（Ⅵ）具有抗性。内生细菌假单胞菌。 R16菌株和O骨菌属sp。选择菌株R24进行Cr（Ⅵ）还原测定。四种菌株均具有较强的将需氧的Cr（Ⅵ）还原为Cr（Ⅲ）的潜力。其中假单胞菌属。孵育150h后，发现菌株R16能够完全还原100mg / L Cr（Ⅵ）。这些结果表明，金丝菜是连续水处理的极佳选择，其功能是从受污染的地下水中去除六价铬，用于随后的农作物灌溉。

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  • 来源
    《Journal of Hazardous Materials》 |2015年第8期|114-120|共7页
  • 作者

    Helen Dimitroula; Evdokia Syranidou; Eleni Manousaki; Nikolaos P. Nikolaidis; George P. Karatzas; Nicolas Kalogerakis;

  • 作者单位

    School of Environmental Engineering, Technical University of Crete, Polytecneioupolis, 73100 Chania, Greece;

    School of Environmental Engineering, Technical University of Crete, Polytecneioupolis, 73100 Chania, Greece;

    School of Environmental Engineering, Technical University of Crete, Polytecneioupolis, 73100 Chania, Greece;

    School of Environmental Engineering, Technical University of Crete, Polytecneioupolis, 73100 Chania, Greece;

    School of Environmental Engineering, Technical University of Crete, Polytecneioupolis, 73100 Chania, Greece;

    School of Environmental Engineering, Technical University of Crete, Polytecneioupolis, 73100 Chania, Greece;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);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

    Cr(Ⅵ); Constructed wetland; J. acutus; Endophytic bacteria; Groundwater remediation;

    机译：六价铬人工湿地;J. acutus;内生细菌;地下水修复;

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