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LABORATORY REMEDIATION OF IRON-SULPHATE CONTAMINANT IN ACID MINE
WATERS USING WASTE ROCKS
Oke, S., M. Purchase, and L. Mokitlane.
Proceedings of the 5th World Congress on New Technologies, 18-20 August, Lisbon, Portugal, 2019
Acid mine drainage (AMD) from an abandoned mine was treated with three waste rocks (shale, bentonite, and a mixture of shale, bentonite, and calcrete to remove iron sulfate. Waste rocks were ground into different particle sizes and sorted by grain size. The sorted grains were arranged from coarsest at the top to finest at the bottom in transparent bottles with a controlled tip end. Results showed iron concentrations in the AMD decreased from 253 mg/L before treatment to 0.08 mg/L (bentonite), 0.02 mg/L (mixture), and 0.80 mg/L (shale) after treatment. Sulfate concentration decreased from 5067 mg/L to 3207 mg/L (bentonite), 3662 mg/L (mixture), and 2238 mg/L (shale) after treatment. Results indicated that waste rocks of shale or bentonite with a variety of grain size contents could remove iron-sulfate contamination and be used for liners in a constructed wetland to minimize AMD generation. https://avestia.com/NewTech2019_Proceedings/files/paper/ICEPR/ICEPR_162.pdf
Proceedings of the 5th World Congress on New Technologies, 18-20 August, Lisbon, Portugal, 2019
Acid mine drainage (AMD) from an abandoned mine was treated with three waste rocks (shale, bentonite, and a mixture of shale, bentonite, and calcrete to remove iron sulfate. Waste rocks were ground into different particle sizes and sorted by grain size. The sorted grains were arranged from coarsest at the top to finest at the bottom in transparent bottles with a controlled tip end. Results showed iron concentrations in the AMD decreased from 253 mg/L before treatment to 0.08 mg/L (bentonite), 0.02 mg/L (mixture), and 0.80 mg/L (shale) after treatment. Sulfate concentration decreased from 5067 mg/L to 3207 mg/L (bentonite), 3662 mg/L (mixture), and 2238 mg/L (shale) after treatment. Results indicated that waste rocks of shale or bentonite with a variety of grain size contents could remove iron-sulfate contamination and be used for liners in a constructed wetland to minimize AMD generation. https://avestia.com/NewTech2019_Proceedings/files/paper/ICEPR/ICEPR_162.
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