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首页> 外文期刊>Environmental Science & Technology >A Field and Modeling Study of Fractured Rock Permeability Reduction Using Microbially Induced Calcite Precipitation
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A Field and Modeling Study of Fractured Rock Permeability Reduction Using Microbially Induced Calcite Precipitation

机译：微生物诱导方解石沉淀降低裂隙岩渗透性的田间模型研究

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摘要

Microbially induced calcite precipitation (MICP) offers an attractive alternative to traditional grouting technologies for creating barriers to groundwater flow and containing subsurface contamination,but has only thus far been successfully demonstrated at the laboratory scale and predominantly in porous media.We present results of the first field experiments applying MICP to reduce fractured rock permeability in the subsurface.Initially,the ureolytic bacterium,Sporosarcina pasteurii,was fixed in the fractured rock.Subsequent injection of cementing fluid comprising calcium chloride and urea resulted in precipitation of large quantities (approximately 750 g) of calcite; significant reduction in the transmissivity of a single fracture over an area of several m2 was achieved in around 17 h of treatment.A novel numerical model is also presented which simulates the field data well by coupling flow and bacterial and solute reactive transport processes including feedback due to aperture reduction via calcite precipitation.The results show that MICP can be successfully manipulated under field conditions to reduce the permeability of fractured rock and suggest that an MICP-based technique,informed by numerical models,may form the basis of viable solutions to aid pollution mitigation.
机译：微生物诱导的方解石沉淀（MICP）为传统的注浆技术提供了一种有吸引力的替代方法，可为地下水流动创造屏障并控制地下污染，但迄今为止，仅在实验室规模和主要在多孔介质中就得到了成功的证明。应用MICP降低地下裂隙岩的渗透性的野外实验。最初，将溶尿细菌，Sporosarcina pasteurii固定在裂隙岩中。随后注入含氯化钙和尿素的固井液导致大量沉淀（约750 g）方解石在约17 h的处理过程中，单个裂缝的透射率显着降低，面积达数m2。还提出了一种新的数值模型，该模型通过耦合流动以及细菌和溶质的反应输运过程（包括反馈），很好地模拟了现场数据结果表明，在野外条件下可以成功地控制MICP以降低裂隙岩的渗透性，并表明基于MICP的技术（通过数值模型）可以构成可行的解决污染的基础减轻。

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  • 来源
    《Environmental Science & Technology》 |2013年第23期|13637-13643|共7页
  • 作者

    Mark O.Cuthbert; Lindsay A.McMillan; Stephanie Handley-Sidhu; Michael.S.Riley; Dominique J.Tobler; Vernon.R.Phoenix;

  • 作者单位

    Water Sciences (Hydrogeology),School of Geography,Earth and Environmental Sciences,University of Birmingham,Birmingham BIS 2TT,U.K.,Connected Waters Initiative Research Centre,The University of New South Wales,110 King St,Manly Vale,NSW,2093,Australia;

    Water Sciences (Hydrogeology),School of Geography,Earth and Environmental Sciences,University of Birmingham,Birmingham BIS 2TT,U.K.;

    Water Sciences (Hydrogeology),School of Geography,Earth and Environmental Sciences,University of Birmingham,Birmingham BIS 2TT,U.K.;

    Water Sciences (Hydrogeology),School of Geography,Earth and Environmental Sciences,University of Birmingham,Birmingham BIS 2TT,U.K.;

    School of Geographical and Earth Sciences,University of Glasgow,Glasgow,G12 8QQ,U.K.,Nano-Science Center,University of Copenhagen,Copenhagen,Denmark;

    School of Geographical and Earth Sciences,University of Glasgow,Glasgow,G12 8QQ,U.K.;

  • 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);
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