Experimental and numerical study of oxygen diffusion through a partially hydrated needle-punched geosymthetic clay liner

Abdelmalek Bouazza, Fashiur Rahman

Research output: Contribution to journalConference articleResearchpeer-review

7 Citations (Scopus)

Abstract

Laboratory experiments were carried out in a closed cell to determine the effective diffusion coefficient of gaseous oxygen through a needle punched geosynthetic clay liner with a top geotextile carrier impregnated with bentonite. It was observed that the diffusion coefficient decreased with the increase of the degree of saturation. The effective diffusion coefficients were obtained by fitting the time oxygen concentration data to curves obtained from a finite layer contaminant transport computer program (POLLUTE®). These curves were verified by an empirical model and finite element programs (SEEPW®/CTRANW®). The analysis of the data obtained in the present investigation show that the empirical model and the theoretical solutions provided by the finite element method and the finite layer method, represent observations quite well.

Original languageEnglish
Pages (from-to)147-158
Number of pages12
JournalASTM Special Technical Publication
Issue number1456
Publication statusPublished - 1 Jan 2004
EventAdvances in Geosynthetic Clay Liner Technology: 2nd Symposium - Denver, United States of America
Duration: 20 Jun 200320 Jun 2003

Keywords

  • Geosynthetic clay liner
  • Laboratory testing
  • Modeling
  • Oxygen diffusion

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