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首页> 外文期刊>Environmental Science & Technology >Real-Time,in Situ Monitoring of Bioactive Zone Dynamics in Heterogeneous Systems
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Real-Time,in Situ Monitoring of Bioactive Zone Dynamics in Heterogeneous Systems

机译：异构系统中生物活性区动态的实时，原位监测

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摘要

Successful implementation of in situ bioremediation is contingent upon understanding how physicochemical and microbial factors affect the formation and dynamics of microbially active regions known as bioactive zones (BAZs).This study demonstrates how a novel fiber optic detection system can be used to test hypotheses concerning realtime,in situ BAZ formation and dynamics.This study focuses on naphthalene transport in saturated porous media containing defined physicochemical and microbial heterogeneities.Biological activity was measured using a lux reporter bacterium,Pseudomonas putida RB1353,that bioluminesces during naphthalene catabolism.Results show that the presence of defined heterogeneities drives the development of BAZs at material-property interfaces where the confluence of naphthalene,dissolved oxygen,and sufficient microbial density is optimal.Thus,despite successful transport of P.putida RB1353 into a sterile low-permeability region containing substrate,BAZ formation in this region was limited by local physicochemical conditions (e.g.,naphthalene and dissolved oxygen bioavailability).In another instance,transport of P.putida RB1353 occurred against advective flow,resulting in BAZ formation upgradient of inoculated regions.Defined systems such as this can be used as a basis for predicting localization of activity in complex subsurface systems.
机译：原位生物修复的成功实施取决于了解理化和微生物因素如何影响称为生物活性区（BAZ）的微生物活性区域的形成和动力学。这项研究证明了如何使用新型光纤检测系统来测试有关实时性的假设本研究主要研究萘在具有确定的理化和微生物异质性的饱和多孔介质中的迁移。使用勒克斯报道细菌Pseudomonas putida RB1353测定了萘在萘分解代谢过程中的生物发光，从而检测了其生物学活性。定义的异质性推动了物质-属性界面处BAZ的发展，其中萘，溶解氧和足够的微生物密度的融合是最佳的。因此，尽管将P.putida RB1353成功运输到了含有底物BAZ的无菌低渗透性区域在此形成该区域受到当地理化条件的限制（例如，萘和溶解氧的生物利用度）。在另一种情况下，恶臭假单胞菌RB1353的运输逆流而流，导致接种区的BAZ形成升级。在复杂的地下系统中预测活动定位的基础。

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  • 来源
    《Environmental Science & Technology》 |2005年第22期|p.8898-8905|共8页
  • 作者

    JONATHAN G.DORN; MARK L.BRUSSEAU; RAINA M.MAIER;

  • 作者单位

    Department of Soil,Water and Environmental Science,The University of Arizona,429 Shantz Building #38,Tucson,Arizona 85721;

    Department of Soil,Water and Environmental Science,The University of Arizona,429 Shantz Building #38,Tucson,Arizona 85721;

    Department of Soil,Water and Environmental Science,The University of Arizona,429 Shantz Building #38,Tucson,Arizona 85721;

  • 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 环境化学;
  • 关键词

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