تقرير
Bioremediation in Fractured Rock: 1. Modeling to Inform Design, Monitoring, and Expectations.
| العنوان: | Bioremediation in Fractured Rock: 1. Modeling to Inform Design, Monitoring, and Expectations. |
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| المؤلفون: | Tiedeman CR, Shapiro AM; U.S. Geological Survey, 12201 Sunrise Valley Drive, Mail Stop 431, Reston, VA 20192., Hsieh PA; U.S. Geological Survey, 345 Middlefield Road, Mail Stop 496, Menlo Park, CA 94025., Imbrigiotta TE; U.S. Geological Survey, 3450 Princeton Pike, Suite 110, Lawrenceville, NJ 08648., Goode DJ; U.S. Geological Survey, 3450 Princeton Pike, Suite 110, Lawrenceville, NJ 08648., Lacombe PJ; U.S. Geological Survey, 3450 Princeton Pike, Suite 110, Lawrenceville, NJ 08648., DeFlaun MF; Geosyntec Consultants, 7 Graphics Drive, Suite 106, Ewing Township, NJ 08628., Drew SR; Geosyntec Consultants, 7 Graphics Drive, Suite 106, Ewing Township, NJ 08628., Johnson CD; U.S. Geological Survey, 11 Sherman Place, Unit 5015, Storrs, CT 06269., Williams JH; U.S. Geological Survey, 425 Jordan Road, Troy, NY 12180., Curtis GP; U.S. Geological Survey, 345 Middlefield Road, Mail Stop 496, Menlo Park, CA 94025. |
| المصدر: | Ground water [Ground Water] 2018 Mar; Vol. 56 (2), pp. 300-316. Date of Electronic Publication: 2017 Sep 05. |
| نوع المنشور: | Case Reports; Research Support, U.S. Gov't, Non-P.H.S. |
| اللغة: | English |
| بيانات الدورية: | Publisher: Blackwell Publishing Country of Publication: United States NLM ID: 9882886 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1745-6584 (Electronic) Linking ISSN: 0017467X NLM ISO Abbreviation: Ground Water Subsets: MEDLINE |
| أسماء مطبوعة: | Publication: 2005- : Malden, MA : Blackwell Publishing Original Publication: Worthington, Ohio : Water Well Journal Pub. Co., |
| مواضيع طبية MeSH: | Biodegradation, Environmental*, Groundwater/*chemistry , Trichloroethylene/*chemistry , Water Pollutants, Chemical/*chemistry, Water Wells |
| مستخلص: | Field characterization of a trichloroethene (TCE) source area in fractured mudstones produced a detailed understanding of the geology, contaminant distribution in fractures and the rock matrix, and hydraulic and transport properties. Groundwater flow and chemical transport modeling that synthesized the field characterization information proved critical for designing bioremediation of the source area. The planned bioremediation involved injecting emulsified vegetable oil and bacteria to enhance the naturally occurring biodegradation of TCE. The flow and transport modeling showed that injection will spread amendments widely over a zone of lower-permeability fractures, with long residence times expected because of small velocities after injection and sorption of emulsified vegetable oil onto solids. Amendments transported out of this zone will be diluted by groundwater flux from other areas, limiting bioremediation effectiveness downgradient. At nearby pumping wells, further dilution is expected to make bioremediation effects undetectable in the pumped water. The results emphasize that in fracture-dominated flow regimes, the extent of injected amendments cannot be conceptualized using simple homogeneous models of groundwater flow commonly adopted to design injections in unconsolidated porous media (e.g., radial diverging or dipole flow regimes). Instead, it is important to synthesize site characterization information using a groundwater flow model that includes discrete features representing high- and low-permeability fractures. This type of model accounts for the highly heterogeneous hydraulic conductivity and groundwater fluxes in fractured-rock aquifers, and facilitates designing injection strategies that target specific volumes of the aquifer and maximize the distribution of amendments over these volumes. (© 2017, National Ground Water Association.) |
| المشرفين على المادة: | 0 (Water Pollutants, Chemical) 290YE8AR51 (Trichloroethylene) |
| تواريخ الأحداث: | Date Created: 20170906 Date Completed: 20180813 Latest Revision: 20181202 |
| رمز التحديث: | 20240628 |
| DOI: | 10.1111/gwat.12585 |
| PMID: | 28873502 |
| قاعدة البيانات: | MEDLINE |
Full Text Finder | تدمد: | 1745-6584 |
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| DOI: | 10.1111/gwat.12585 |