Interpretation of breakthrough curves and percolation factors from sub-tropical smectite, Fe-chlorite and kaolinite clayey soil-AMD interactions

Emmanuel Emem Obong Agbenyeku, Edison Muzenda, Innocent Mandla Msibi

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Climate change, growth in population and rising pressures on natural recourses triggered by mining and similar activities have led to enormous environmental challenges. Acid mine drainage (AMD) from mining operations in South Africa causes severe environmental issues in need of drastic and lasting solutions. Contamination from AMD requires prevention and mitigation measures to address the various significant impacts on human and environmental health. This pressing challenge permitted the study to investigate and analyze the breakthrough curves and permeation parameters of a subtropical kaolinite clay mineral soil interacted with AMD towards determining its buffering efficacy as a natural contaminant barrier for use in sites prone to AMD contamination. Series of AMD permeation through the soil medium was conducted. The results of the study revealed that when the soil was percolated with 0.01N CaS04, a baseline hydraulic conductivity of 8.2 10-12 m/s was reached which increased to about 9.1 x 10-12 m/s after percolation with 2 pore volumes of AMD. Nevertheless, after passing 23 pore volumes of AMD, the hydraulic conductivity was seen to increase by nearly half an order of magnitude (8.2 x 10-12 m/s to 1.5 10-11 m/s). The value was found to be below the accepted criterion of 1 10-9 m/s specified for clay liner construction in South Africa as such may not be used solely in the construction of containment barriers for acid-forming waste.

Original languageEnglish
Title of host publicationWCECS 2016 - World Congress on Engineering and Computer Science 2016
EditorsWarren S. Grundfest, Craig Douglas, S. I. Ao
PublisherNewswood Limited
Pages673-679
Number of pages7
Volume2226
ISBN (Electronic)9789881404824
Publication statusPublished - Jan 1 2016
Event2016 World Congress on Engineering and Computer Science, WCECS 2016 - San Francisco, United States
Duration: Oct 19 2016Oct 21 2016

Other

Other2016 World Congress on Engineering and Computer Science, WCECS 2016
CountryUnited States
CitySan Francisco
Period10/19/1610/21/16

All Science Journal Classification (ASJC) codes

  • Computer Science (miscellaneous)

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    Agbenyeku, E. E. O., Muzenda, E., & Msibi, I. M. (2016). Interpretation of breakthrough curves and percolation factors from sub-tropical smectite, Fe-chlorite and kaolinite clayey soil-AMD interactions. In W. S. Grundfest, C. Douglas, & S. I. Ao (Eds.), WCECS 2016 - World Congress on Engineering and Computer Science 2016 (Vol. 2226, pp. 673-679). Newswood Limited.