کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4547578 | 1627126 | 2007 | 13 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Analysis of a gas-phase partitioning tracer test conducted in an unsaturated fractured-clay formation
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
Alkane - آلکانUnsaturated - اشباع نشدهCapillary fringe - حاشیه مویرگیPartitioning tracer - ردیابی پارتیشن بندیClay - رسFracture - شکستگیGas phase - فاز گازWater content - محتوای آبBreakthrough curves - منحنی های دستیابی به موفقیتVadose zone - منطقه هواده، منطقه تهویه، منطقه اشباع نشدهHalon - هالونHelium - هلیمNoble gas - گاز نجیب
موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
فرآیندهای سطح زمین
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The gas-phase partitioning tracer method was used to estimate non-aqueous phase liquid (NAPL), water, and air saturations in the vadose zone at a chlorinated-solvent contaminated field site in Tucson, AZ. The tracer test was conducted in a fractured-clay system that is the confining layer for the underlying regional aquifer. Three suites of three tracers were injected into wells located 14, 24, and 24Â m from a single, central extraction well. The tracers comprised noble gases (traditionally thought to be nonsorbing), alkanes (primarily water partitioning), perfluorides (primarily NAPL partitioning), and halons (both NAPL and water partitioning). Observations of vacuum response were consistent with flow in a fractured system. The halon tracers exhibited the greatest amount of retardation, and helium and the perfluoride tracers the least. The alkane tracers were unexpectedly more retarded than the perfluoride tracers, indicating low NAPL saturations and high water saturations. An NAPL saturation of 0.01, water saturation of 0.215, and gas saturation of 0.775 was estimated based on analysis of the suite of tracers comprising helium, perfluoromethylcyclohexane and dibromodifluoromethane, which was considered to be the most robust set. The estimated saturations compare reasonably well to independently determined values.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Contaminant Hydrology - Volume 90, Issues 3â4, 20 March 2007, Pages 146-158
Journal: Journal of Contaminant Hydrology - Volume 90, Issues 3â4, 20 March 2007, Pages 146-158
نویسندگان
Michelle A. Simon, Mark L. Brusseau,