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 language | English |
|---|---|
| Title of host publication | WCECS 2016 - World Congress on Engineering and Computer Science 2016 |
| Editors | Warren S. Grundfest, Craig Douglas, S. I. Ao |
| Publisher | Newswood Limited |
| Pages | 673-679 |
| Number of pages | 7 |
| Volume | 2226 |
| ISBN (Electronic) | 9789881404824 |
| Publication status | Published - Jan 1 2016 |
| Event | 2016 World Congress on Engineering and Computer Science, WCECS 2016 - San Francisco, United States Duration: Oct 19 2016 → Oct 21 2016 |
Other
| Other | 2016 World Congress on Engineering and Computer Science, WCECS 2016 |
|---|---|
| Country | United States |
| City | San Francisco |
| Period | 10/19/16 → 10/21/16 |
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All Science Journal Classification (ASJC) codes
- Computer Science (miscellaneous)
Cite this
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Interpretation of breakthrough curves and percolation factors from sub-tropical smectite, Fe-chlorite and kaolinite clayey soil-AMD interactions. / Agbenyeku, Emmanuel Emem Obong; Muzenda, Edison; Msibi, Innocent Mandla.
WCECS 2016 - World Congress on Engineering and Computer Science 2016. ed. / Warren S. Grundfest; Craig Douglas; S. I. Ao. Vol. 2226 Newswood Limited, 2016. p. 673-679.Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
TY - GEN
T1 - Interpretation of breakthrough curves and percolation factors from sub-tropical smectite, Fe-chlorite and kaolinite clayey soil-AMD interactions
AU - Agbenyeku, Emmanuel Emem Obong
AU - Muzenda, Edison
AU - Msibi, Innocent Mandla
PY - 2016/1/1
Y1 - 2016/1/1
N2 - 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.
AB - 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.
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M3 - Conference contribution
VL - 2226
SP - 673
EP - 679
BT - WCECS 2016 - World Congress on Engineering and Computer Science 2016
A2 - Grundfest, Warren S.
A2 - Douglas, Craig
A2 - Ao, S. I.
PB - Newswood Limited
ER -