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Author |
Guay, R. |
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Title |
Effect of flooding of oxidized mine tailings on T-ferrooxidans and T-thiooxidans survival and acid mine drainage production: a 4 year restoration-environmental follow-up |
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1999 |
Publication |
Biohydrometallurgy and the Environment toward the Mining of the 21st Century, Pt B 1999 |
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9 |
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635-643 |
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mine water treatment |
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Abstract |
A pilot-scale study on the effect of flooding unoxidized and oxidized Cu/Zn tailings demonstrated the technical feasability of this technology to remediate a mining site where over 3 million tons of tailings were impounded. Full-scale flooding of the tailing pond with free running water was undertaken after the construction of an impervious dam; approximately 2 million m(3) of surface water at pH 7,4 completely covered the tailings after 16 months. The minimal water column over the tailings was established at 1,20 m and reached 4,5 m, depending on the site topography. Water and tailings samples were collected from 9 different locations from the surface of the man-made lake using a specially designed borer and were analyzed for pH, conductivity, iron- and sulfur-oxidizing bacteria activity and numbers as well as the sulfate reducing bacteria (SRB) population. We showed that over a four year period of flooding, the overall population of iron-oxidizers decreased considerably; their numbers drastically fell from 1 x 10(6) to 1 x 10(2) active cells per g of oxidized tailings while the SRBs increased from 10(1) to 10(5)/g. The pH of the influent, the reservoir and the effluent water remained fairly constant between 6,9 up to 7,4 over the entire period. During this time, interstitial water pH increased from 2,9 to 4,3 in flooded tailings where lime could not be incorporated in the first 20 cm of tailings; elsewhere, the pH of the tailings suspensions remained fairly constant around neutral values (pH 7,0). Dissolved oxygen was measured at fixed intervals and remained also constant between 6 and 7.5 mg/L while water temperatures fluctuated below freezing point to +20C respectively in winter and summer season. |
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Effect of flooding of oxidized mine tailings on T-ferrooxidans and T-thiooxidans survival and acid mine drainage production: a 4 year restoration-environmental follow-up; Isip:000086245100066; Times Cited: 0; ISI Web of Science |
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CBU @ c.wolke @ 17121 |
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175 |
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Author |
Boonstra, J. |
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Title |
Biological treatment of acid mine drainage |
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Journal Article |
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Year |
1999 |
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Biohydrometallurgy and the Environment toward the Mining of the 21st Century, Pt B 1999 |
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9 |
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559-567 |
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mine water treatment |
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In this paper experience obtained with THIOPAQ technology treating Acid Mine Drainage is described. THIOPAQ Technology involves biological sulfate reduction technology and the removal of heavy metals as metal sulfide precipitates. The technology was developed by the PAQUES company, who have realised over 350 high rate biological treatment plants world wide. 5 plants specially designed for sulfate reduction are successfully operated on a continuous base (1998 status). |
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Biological treatment of acid mine drainage; Isip:000086245100058; Times Cited: 0; ISI Web of Science |
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CBU @ c.wolke @ 17117 |
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176 |
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Author |
Zaluski, M. |
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Design and construction of bioreactors with sulfate-reducing bacteria for acid mine drainage control |
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1999 |
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Phytoremediation and Innovative Strategies for Specialized Remedial Applications |
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205-210 |
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mine water treatment |
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At many abandoned mine sites in the Western U.S., conventional treatment of AMD is not feasible due to the of lack of power and limited site accessibility. Therefore, three bioreactors were built at an abandoned mine site in Montana to demonstrate feasibility of treating AMD using sulphate reducing bacteria (SRB) in a passive water treatment train. The SRB are capable of increasing the pH and reducing the load of dissolved metals in the effluent. The reactors, constructed in the Fall of 1998, were designed to evaluate the SRB technology applied under different environmental conditions. Each bioreactor was designed with mechanisms to enable simulation of seasonal dry and wet climatic conditions. Two bioreactors were placed in trenches and one was constructed above the ground to investigate impact of seasonal freezing and thawing on SRB activity. Two bioreactors contain a passive pretreatment section to increase pH of water before the AMD enters the bioreactor chamber. |
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Design and construction of bioreactors with sulfate-reducing bacteria for acid mine drainage control; Isip:000082416500033; Times Cited: 0; ISI Web of Science |
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CBU @ c.wolke @ 17136 |
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177 |
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Author |
Blowes, D.W.; Ptacek, C.J.; Benner, S.G.; McRae, C.W.T.; Puls, R.W. |
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Title |
Treatment of dissolved metals using permeable reactive barriers |
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1998 |
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Groundwater Quality: Remediation and Protection |
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250 |
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483-490 |
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adsorption; aquifers; attenuation; dissolved materials; metals; nutrients; oxidation; pollutants; pollution; precipitation; reduction; water treatment Groundwater quality Pollution and waste management non radioactive Groundwater acid mine drainage aquifer pollution conference proceedings containment barrier metal tailings Canada Ontario Nickel Rim Mine United States North Carolina Elizabeth City mine water treatment |
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Permeable reactive barriers are a promising new approach to the treatment of dissolved contaminants in aquifers. This technology has progressed rapidly from laboratory studies to full-scale implementation over the past decade. Laboratory treatability studies indicate the potential for treatment of a large number of inorganic contaminants, including As, Cd, Cr, Cu, Hg, Fe, Mn, Mo, Ni, Pb, Se, Tc, U, V, NO3, PO4, and SO4. Small scale field studies have indicated the potential for treatment of Cd, Cr, Cu, Fe, Ni, Pb, NO3, PO4, and SO4. Permeable reactive barriers have been used in full-scale installations for the treatment of hexavalent chromium, dissolved constituents associated with acid-mine drainage, including SO4, Fe, Ni, Co and Zn, and dissolved nutrients, including nitrate and phosphate. A full-scale barrier designed to prevent the release of contaminants associated with inactive mine tailings impoundment was installed at the Nickel Rim mine site in Canada in August 1995. This reactive barrier removes Fe, SO,, Ni and other metals. The effluent from the barrier is neutral in pH and contains no acid-generating potential, and dissolved metal concentrations are below regulatory guidelines. A full-scale reactive barrier was installed to treat Cr(VI) and halogenated hydrocarbons at the US Coast Guard site in Elizabeth City, North Carolina, USA in June 1996. This barrier removes Cr(VI) from >8 mg l(-1) to <0.01 mg l(-1). |
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0144-7815 |
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Treatment of dissolved metals using permeable reactive barriers; Isip:000079718200072; Times Cited: 0; ISI Web of Science |
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Call Number |
CBU @ c.wolke @ 8601 |
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178 |
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Author |
Kleinmann, R.L.P. |
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Title |
Treatment of mine drainage by anoxic limestone drains and constructed wetlands |
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Year |
1998 |
Publication |
Acidic Mining Lakes |
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303-319 |
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mine water treatment |
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Treatment of mine drainage by anoxic limestone drains and constructed wetlands; Isip:000078867600016; Times Cited: 0; ISI Web of Science |
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CBU @ c.wolke @ 8621 |
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179 |
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