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首页> 外文期刊>Environmental Science & Technology >Evaluating the Potential of Native Ureolytic Microbes To Remediate a ~(90)Sr Contaminated Environment
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Evaluating the Potential of Native Ureolytic Microbes To Remediate a ~(90)Sr Contaminated Environment

机译:评价天然溶菌微生物修复〜(90)Sr污染环境的潜力

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摘要

This study was a preliminary evaluation of ureolytjcalry driven calcite precipitation and strontium copreciprtation for remediating ~(90)Sr contamination at the Hanford 100-N Area in Washington; in particular the approach is suitable for treating sorbed ~(90)Sr that could otherwise be a long-term source for groundwater contamination. Geochemical conditions at the site are compatible with long-term calcite stability, and therefore groundwater and sediment samples were examined to assess the ureolytic capabilities of the native microbiota. Quantitative assays detected up to 2 × 104 putative ureC gene copies mL~(-1) in water and up to 9 × 10~5 copies g~(-1) in sediment. The ureC assays and laboratory-based estimates of ureolytic activity indicated that the distribution of in situ ureolytic potential was very heterogeneous with depth and also that the ureolytic activity was predominantly associated with attached organisms. A mixed kinetic-equilibrium model was developed for the 100-N site to simulate urea treatment and predict strontium removal- Together, the microbial characterization data and modeling suggest that the site has the requisite bio-geochemical characteristics for application of the calcite precipitation remediation approach for ~(90)Sr.
机译:这项研究是由尿素溶解驱动方解石沉淀和锶共沉淀以补救华盛顿州汉福德100-N区〜(90)Sr污染的初步评估。特别是,该方法适用于处理〜(90)Sr吸附,否则可能会长期污染地下水。该地点的地球化学条件与长期方解石稳定性兼容,因此对地下水和沉积物样品进行了评估,以评估天然微生物的溶尿能力。定量分析检测到水中最多有2×104个假定的ureC基因拷贝mL〜(-1),在沉积物中最多有9×10〜5个拷贝g〜(-1)。 ureC分析和基于实验室的溶尿活性估算表明,原位溶尿潜力的分布在深度上非常不均一,而且溶尿活性主要与附着的生物有关。针对100-N站点开发了一个混合动力平衡模型,以模拟尿素处理和预测锶的去除。微生物特征数据和建模共同表明,该站点具有方解石沉淀修复方法的应用所必需的生物地球化学特征。 〜(90)锶

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  • 来源
    《Environmental Science & Technology》 |2010年第19期|p.7652-7658|共7页
  • 作者单位

    Idaho National Laboratory, Idaho Falls, Idaho 83415;

    rnIdaho National Laboratory, Idaho Falls, Idaho 83415;

    rnIdaho National Laboratory, Idaho Falls, Idaho 83415;

    rnIdaho National Laboratory, Idaho Falls, Idaho 83415;

    rnUniversity of Idaho-Idaho Falls, Idaho Falls, Idaho 83402;

  • 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
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