Abstract
In the present paper, constructed wetland and ultraviolet (UV)/TiO2 photocatalysis processes were employed to treat acid mine drainage. Acid mine drainage samples were collected from Mpumalanga (South Africa) and they were characterized for heavy metals and sulphate concentrations. Unvegetated up-flow constructed wetlands were employed as pre-treatment in order to remove maximum concentrations of heavy metals, and a slurry
photocatalytic reactor was used to reduce Cr(VI) in the acid mine
drainage effluents from the constructed wetlands under optimum conditions. The maximum removal of total chromium achieved by all constructed wetlands was 65% after the optimum hydraulic
retention time (HRT) of 5 days; and was 68% for Cr(VI) photocatalytic reduction after the optimum HRT of 3 hrs in a slurry photocatalytic reactor. The experimental data obtained were tested by first order and second order kinetic models. It was clearly demonstrated that the experimental data of Fe and Cr fit quite well first order kinetic model equation.
photocatalytic reactor was used to reduce Cr(VI) in the acid mine
drainage effluents from the constructed wetlands under optimum conditions. The maximum removal of total chromium achieved by all constructed wetlands was 65% after the optimum hydraulic
retention time (HRT) of 5 days; and was 68% for Cr(VI) photocatalytic reduction after the optimum HRT of 3 hrs in a slurry photocatalytic reactor. The experimental data obtained were tested by first order and second order kinetic models. It was clearly demonstrated that the experimental data of Fe and Cr fit quite well first order kinetic model equation.
| Original language | English |
|---|---|
| Pages | 7-13 |
| Number of pages | 7 |
| Publication status | Published - 2014 |
| Event | 2014 International Conference on Chemical Engineering & Advanced Computational Technologies - Pretoria, South Africa Duration: Nov 24 2014 → Nov 25 2014 |
Conference
| Conference | 2014 International Conference on Chemical Engineering & Advanced Computational Technologies |
|---|---|
| Abbreviated title | ICCEACT’2014 |
| Country | South Africa |
| City | Pretoria |
| Period | 11/24/14 → 11/25/14 |
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Cite this
Seadira, T., Baloyi, J., Raphulu, M., Moutloali, R., & Ochieng, A. (2014). Treatment of Cr(VI)-Laden Acid Mine Drainage Using Constructed Wetland and UV/TiO2 Photocatalysis. 7-13. Paper presented at 2014 International Conference on Chemical Engineering & Advanced Computational Technologies, Pretoria, South Africa. http://iieng.org/images/proceedings_pdf/5762E1114009.pdf