مورد إلكتروني
Remobilization of Residual Non-Aqueous Phase Liquid in Porous Media by Freeze - Thaw Cycles
| العنوان: | Remobilization of Residual Non-Aqueous Phase Liquid in Porous Media by Freeze - Thaw Cycles |
|---|---|
| المصدر: | Environmental Science and Technology |
| بيانات النشر: | American Chemical Society 2011 |
| تفاصيل مُضافة: | Singh, Kamaljit Niven, Robert Senden, Timothy Turner, Michael Sheppard, Adrian Middleton, Jill Knackstedt, Mark |
| نوع الوثيقة: | Electronic Resource |
| مستخلص: | The pore-scale behavior of a nonaqueous phase liquid (NAPL) trapped as residual contamination in a porous medium, subject to freeze-thaw cycles, was investigated by X-ray microcomputed tomography. It is shown that freeze-thaw cycles cause significant NAPL remobilization in the direction of the freezing front, due to the rupture and transport of a significant proportion of (supposedly entrapped) larger multipore NAPL ganglia. Significant NAPL remains in place, however, due to substantial ganglion fragmentation into single- and subpore ganglia. The contraction of branched ganglia into more rounded forms, especially near the top surface, is also observed. Three freezing-induced mechanisms are proposed to explain the results. The findings have important implications for NAPL contamination in cold regions, and for the behavior of water-hydrocarbon systems on the Earth and other planets. |
| مصطلحات الفهرس: | Keywords: Cold regions; Freeze-thaw cycles; Hydrocarbon systems; Microcomputed tomography; NAPL contamination; Nonaqueous phase liquids; Porous Media; Porous medium; Remobilization; Top surface; Computerized tomography; Freezing; Hydrocarbons; Liquids; Porous mater, Journal article |
| URL: | |
| الإتاحة: | Open access content. Open access content |
| أرقام أخرى: | AUANP oai:openresearch-repository.anu.edu.au:1885/59419 0013-936X 1291785417 |
| المصدر المساهم: | AUSTRALIAN NAT UNIV - PRINT REPOSITORY From OAIster®, provided by the OCLC Cooperative. |
| رقم الانضمام: | edsoai.on1291785417 |
| قاعدة البيانات: | OAIster |
| الوصف غير متاح. |