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Remediation Design of Acid Rock Drainage (ARD) from Goro Abandoned Mine  

Choi, Jung-Chan (Dept. of Environmental Geosciences, Pukyong National University)
Lee, Min-Hee (Dept. of Environmental Geosciences, Pukyong National University)
Publication Information
Journal of Soil and Groundwater Environment / v.9, no.2, 2004 , pp. 1-10 More about this Journal
Abstract
The purpose of this study is to evaluate a laboratory test on arsenic reduction efficiency for ARD (Acid Rock Drainage) using limestone and apatite, and to design an apatite drain system. As a result of the laboratory test, results of this study show that pH, arsenic removal ratio, and dissolution amount of limestone ＆ apatite are inversely proportional to flow rates, and apatite removes 100％ of arsenic at 0.6 ml/min/kg flow rate. It is supposed that dissolution rate of apatite is ten times higher than that of limestone. The arsenic compounds are assumed to be Johnbaumnite, and/or Ca-arsenic hydrate. According to the results of the laboratory test, apatite drain system is designed as follow; Sixty two tons of apatite will be needed per one year and six months, and the precipitates will be removed from the precipitation pond per 3 months.
Keywords
laboratory test; ARD; limestone; apatite; precipitates;
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