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http://dx.doi.org/10.7857/JSGE.2013.18.7.073

Geochemical Reaction Processes and Controls on the Coal Mine Drainage using Pilot-scale Inclined Clarifiers  

Lee, SangHoon (가톨릭대학교 환경공학전공)
Oh, Minah (서울시립대학교 환경공학부)
Lee, Jai-Young (서울시립대학교 환경공학부)
Kwon, Eunhye (가톨릭대학교 환경공학전공)
Kim, Doyoung (가톨릭대학교 환경공학전공)
Kim, DukMin (한국광해관리공단 광해기술연구소)
Publication Information
Journal of Soil and Groundwater Environment / v.18, no.7, 2013 , pp. 73-80 More about this Journal
Abstract
Fine suspended solids from coal mine drainage were treated in the treating plant, using two different pilot-scale inclined clarifiers: radial and lamella types. Suspended solids in the mine drainage were monitored along with other geochemical factors, and metal contents. Fe and Mn are the main chemical components in the drainage, which exist predominantly as total metal forms, whereas dissolved portion is negligible. The raw mine drainage is subject to physical and chemical treatment using $CaCO_3$ and NaOH, therefore the suspended solids are thought to be composed of Fe and Mn precipitates, possibly $Fe(OH)_3$, along with carbonate precipitates. The elemental composition of precipitates are confirmed by SEM-EDS analysis. As nearly all the dissolved ions were precipitated in the primary process by $CaCO_3$, no further aeration or prolonged oxygenation are of necessity in this plant. Adoption of inclined clarifier proved to be effective in treating fine suspended solids in the current plant. Successful application of the inclined clarifier will also be beneficial to improve the current treating process by excluding the current application of chemical agent in the first stage. The final effluents from the pilot plant meet the national standards and the low dissolved Fe and Mn contents are expected not to cause secondary precipitation after discharge.
Keywords
Coal mine drainage; Suspended solids; Fe precipitates; Sand bed; Inclined clarifier;
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Times Cited By KSCI : 2  (Citation Analysis)
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