Determining the Long-Term Effects of Interactions Between Waste Permeants and Porous Media / S. Haji-Djafari, JC. Wright
- Conference Author:
- Hazardous and Industrial Solid Waste Testing: Second Symposium (2nd : 1982 : Lake Buena Vista, FL)
- Physical Description:
- 1 online resource (19 pages) : illustrations, figures, tables
- Additional Creators:
- Haji-Djafari, S.
American Society for Testing and Materials
- Restrictions on Access:
- Subscription required for access to full text.
License restrictions may limit access.
- Waste materials are often disposed in facilities constructed from natural earth materials. Frequently, the natural materials, especially clays, are emplaced to meet specifications designed to limit the migration of the wastes or their leachates from the disposal facility. However, as waste leachates permeate through earth materials, chemical reactions can occur which may cause the emplaced materials to no longer meet the disposal facility design specifications. A test procedure has been utilized to assess the long-term effects of waste leachates upon earth materials, that is, permeant-porous media interactions. The test consists of compacting representative specimens of the porous media to represent its field hydraulic conductivity, determining a reference hydraulic conductivity, based on a 0.01 N calcium sulfate (CaSO4) solution, site groundwater or tap water, and then changing the permeant to the anticipated waste leachate. Field-time conditions are accelerated by permeating the waste fluid through the porous media under pressure. By monitoring the time, flow, and chemistry of the permeant effluents and with assessments of hydrologic and geochemical parameters, it is possible to evaluate long-term characteristics of flow and mass transport through the porous media. Evaluation of the performance of waste disposal facilities, including changes in the hydraulic conductivity of the porous media due to chemical reactions with the permeant and calculation of retardation factors for solutes of interest, has been the primary concern of our testing. Retardation factors are defined as the dimensionless ratio of the average linear water velocity to solute migration velocity, and can be determined by monitoring the solute front advancement within the porous media in relation to a tracer that does not react with the porous media. The testing methods and evaluation of the results are presented.
- Dates of Publication and/or Sequential Designation:
- Volume 1983, Issue 805 (January 1983)
- 9780803148727 (e-ISBN)
- Digital File Characteristics:
- text file PDF
- Bibliography Note:
- Includes bibliographical references 15.
- Other Forms:
- Also available online via the World Wide Web. Tables of contents and abstracts freely available; full-text articles available by subscription.
Full text article also available for purchase.
Also available in PDF edition.
- Reproduction Note:
- Electronic reproduction. W. Conshohocken, Pa. : ASTM International, 1983. Mode of access: World Wide Web. System requirements: Web browser. Access may be restricted to users at subscribing institutions.
- Technical Details:
- Mode of access: World Wide Web.
- Source of Acquisition:
- ASTM International PDF Purchase price USD25.
View MARC record | catkey: 28004840