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Sheoran, A.S.; Sheoran, V. |
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Heavy metal removal mechanism of acid mine drainage in wetlands: A critical review |
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2006 |
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Minerals Engineering |
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19 |
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2 |
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105-116 |
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Acid mine drainage Metal removal mechanism Wetlands |
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Acid mine drainage (AMD) is one of the most significant environmental challenges facing the mining industry worldwide. Water infiltrating through the metal sulphide minerals, effluents of mineral processing plants and seepage from tailing dams becomes acidic and this acidic nature of the solution allows the metals to be transported in their most soluble form. The conventional treatment technologies used in the treatment of acid mine drainage are expensive both in terms of operating and capital costs. One of the methods of achieving compliance using passive treatment systems at low cost, producing treated water pollution free, and fostering a community responsibility for acid mine water treatment involves the use of wetland treatment system. These wetlands absorb and bind heavy metals and make them slowly concentrated in the sedimentary deposits to become part of the geological cycle. In this paper a critical review of the heavy metal removal mechanism involving various physical, chemical and biological processes, which govern wetland performance, have been made. This information is important for the siting and use of wetlands for remediation of heavy metals. |
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Heavy metal removal mechanism of acid mine drainage in wetlands: A critical review; Science Direct |
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CBU @ c.wolke @ 17252 |
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41 |
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Agency, U.S.E.P.; Development, O. of R. and |
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Active and semi-passive lime treatment of acid mine drainage at Leviathan Mine, California |
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RPT |
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2006 |
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94 |
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National Risk Management Research Laboratory, Office of Research and Development, U.S. Environmental Protection Agency |
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Cincinnati, OH |
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Mar; Active and semi-passive lime treatment of acid mine drainage at Leviathan Mine, California; file:///C:/Dokumente%20und%20Einstellungen/Stefan/Eigene%20Dateien/Artikel/7171.pdf; Opac |
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CBU @ c.wolke @ 7171 |
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62 |
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Sibrell, P.L. |
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Limestone fluidized bed treatment of acid-impacted water at the Craig Brook National Fish Hatchery, Maine, USA |
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2006 |
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Aquacultural Engineering |
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34 |
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2 |
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61-71 |
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mine water treatment |
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Decades of atmospheric acid deposition have resulted in widespread lake and river acidification in the northeastern U.S. Biological effects of acidification include increased mortality of sensitive aquatic species Such as the endangered Atlantic salmon (Salmo salar). The purpose of this paper is to describe the development of a limestone-based fluidized bed system for the treatment of acid-impacted waters. The treatment system was tested at the Craig Brook National Fish Hatchery in East Orland, Maine over a period of 3 years. The product water from the treatment system was diluted with hatchery water to prepare water supplies with three different levels of alkalinity for testing of fish health and Survival. Based on positive results from a prototype system used in the first year of the study, a larger demonstration system was used in the second and third years with the objective of decreasing operating costs. Carbon dioxide was used to accelerate limestone dissolution, and was the major factor in system performance, as evidenced by the model result: Alk = 72.84 X P(CO2)(1/2); R-2 = 0.975. No significant acidic incursions were noted for the control water over the course of the Study. Had these incursions occurred, survivability in the untreated water would likely have been much more severely impacted. Treated water consistently provided elevated alkalinity and pH above that of the hatchery source water. (C) 2005 Elsevier B.V. All rights reserved. |
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Limestone fluidized bed treatment of acid-impacted water at the Craig Brook National Fish Hatchery, Maine, USA; Wos:000235568800001; Times Cited: 0; ISI Web of Science |
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CBU @ c.wolke @ 16942 |
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113 |
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Canty, G.A.; Everett, J.W. |
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Title |
Injection of Fluidized Bed Combustion Ash into Mine Workings for Treatment of Acid Mine Drainage |
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2006 |
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Mine Water Env. |
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25 |
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1 |
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45-55 |
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acid mine drainage AMD alkaline injection technology fluidized bed combustion ash Oklahoma |
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A demonstration project was conducted to investigate treating acid mine water by alkaline injection technology (AIT). A total of 379 t of alkaline coal combustion byproduct was injected into in an eastern Oklahoma drift coal mine. AIT increased the pH and alkalinity, and reduced acidity and metal loading. Although large improvements in water quality were only observed for 15 months before the effluent water chemistry appeared to approach pre-injection conditions, a review of the data four years after injection identified statistically significant changes in the mine discharge compared to pre-injection conditions. Decreases in acidity (23%), iron (18%), and aluminium (47%) were observed, while an increase in pH (0.35 units) was noted. Presumably, the mine environment reached quasi-equilibrium with the alkalinity introduced to the system. |
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1025-9112 |
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Injection of Fluidized Bed Combustion Ash into Mine Workings for Treatment of Acid Mine Drainage; 1; FG 6 Abb., 1 Tab.; AMD ISI | Wolkersdorfer |
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CBU @ c.wolke @ 17319 |
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422 |
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Bearcock, J.M. |
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Accelerated precipitation of ochre for mine water remediation |
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2006 |
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Geochim. Cosmochim. Acta |
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70 |
Issue |
18 |
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A42-A42 |
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mine water treatment |
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Accelerated precipitation of ochre for mine water remediation; Wos:000241374200094; Times Cited: 0; ISI Web of Science |
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CBU @ c.wolke @ 16919 |
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104 |
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