دورية أكاديمية
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The complex spatial distribution of trichloroethene and the probability of NAPL occurrence in the rock matrix of a mudstone aquifer.

التفاصيل البيبلوغرافية
العنوان: The complex spatial distribution of trichloroethene and the probability of NAPL occurrence in the rock matrix of a mudstone aquifer.
المؤلفون: Shapiro AM; U.S. Geological Survey, Reston, VA 20192, USA. Electronic address: ashapiro@usgs.gov., Goode DJ; U.S. Geological Survey, Lawrenceville, NJ 08648, USA., Imbrigiotta TE; U.S. Geological Survey, Lawrenceville, NJ 08648, USA., Lorah MM; U.S. Geological Survey, Catonsville, MD 21228, USA., Tiedeman CR; U.S. Geological Survey, Menlo Park, CA 94025, USA.
المصدر: Journal of contaminant hydrology [J Contam Hydrol] 2019 Jun; Vol. 223, pp. 103478. Date of Electronic Publication: 2019 Apr 09.
نوع المنشور: Journal Article
اللغة: English
بيانات الدورية: Publisher: Elsevier Country of Publication: Netherlands NLM ID: 8805644 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1873-6009 (Electronic) Linking ISSN: 01697722 NLM ISO Abbreviation: J Contam Hydrol Subsets: MEDLINE
أسماء مطبوعة: Original Publication: Amsterdam ; New York : Elsevier, [c1986-
مواضيع طبية MeSH: Groundwater* , Trichloroethylene* , Water Pollutants, Chemical*, Diffusion ; Probability
مستخلص: Methanol extractions for chloroethene analyses are conducted on rock samples from seven closely spaced coreholes in a mudstone aquifer that was subject to releases of the nonaqueous phase liquid (NAPL) form of trichloroethene (TCE) between the 1950's and 1990's. Although TCE concentration in the rock matrix over the length of coreholes is dictated by proximity to subhorizontal bedding plane fractures, elevated TCE concentrations in the rock matrix are not continuous along the most permeable bedding plane fractures. A complex configuration of subvertical and subhorizontal fractures appears to be responsible for the TCE distribution from prior TCE releases at land surface. Phase partitioning calculations of TCE in the rock matrix show that most TCE is adsorbed to solid surfaces because of the large fraction of organic carbon (f oc ) in the mudstone. Large TCE content in some cores indicate the likely presence of the NAPL form of TCE in the rock matrix. Using average values of porosity (n) and f oc in phase partitioning calculations identifies a number of locations of possible NAPL occurrence in the rock matrix. Samples of mudstone analyzed for n and f oc show variability in these properties over several orders of magnitude. Accounting for this variability in phase partitioning calculations identifies a probability of NAPL occurrence, P NAPL . The spatial variability of P NAPL along coreholes identifies a configuration that may be attributed to a TCE source zone that has evolved after emplacement due to NAPL dissolution, adsorption, and matrix diffusion.
(Published by Elsevier B.V.)
المشرفين على المادة: 0 (Water Pollutants, Chemical)
290YE8AR51 (Trichloroethylene)
تواريخ الأحداث: Date Created: 20190421 Date Completed: 20191128 Latest Revision: 20191128
رمز التحديث: 20240628
DOI: 10.1016/j.jconhyd.2019.04.001
PMID: 31003861
قاعدة البيانات: MEDLINE
الوصف
تدمد:1873-6009
DOI:10.1016/j.jconhyd.2019.04.001