| Records |
| Author |
Laspidou, C.S. |
| Title |
Constructed wetlands technology and water quality improvement: Recent advances |
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Journal Article |
| Year |
2005 |
Publication |
Proceeding of the 9th International Conference on Environmental Science and Technology Vol B – Poster Presentations |
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B503-B508 |
| Keywords |
mine water treatment |
| Abstract |
Today's demands for improved water quality in receiving waters are widespread and require the implementation of systems that are natural, low-cost and minimal-maintenance that could effectively treat polluted discharges. Wetlands are such systems and are recently receiving a lot of attention from scientists, ecologists and engineers, as they are deemed appropriate for reducing the impact of effluent and run-off on receiving waters. Since a large part of natural wetlands have been lost-about 53% of them in the United States from the 1780s to the 1980s-management options for improving receiving water quality, water reclamation and reuse involve the application of constructed wetlands technology. |
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Constructed wetlands technology and water quality improvement: Recent advances; Isip:000237755500082; Times Cited: 0; ISI Web of Science |
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no |
| Call Number |
CBU @ c.wolke @ 16966 |
Serial |
152 |
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| Author |
Blowes, D.W.; Ptacek, C.J.; Benner, S.G.; McRae, C.W.T.; Puls, R.W. |
| Title |
Treatment of dissolved metals using permeable reactive barriers |
Type |
Journal Article |
| Year |
1998 |
Publication |
Groundwater Quality: Remediation and Protection |
Abbreviated Journal |
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Issue |
250 |
Pages |
483-490 |
| Keywords |
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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CBU @ c.wolke @ 8601 |
Serial |
178 |
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| Author |
Naugle, W.K. |
| Title |
Remediation of the Eagle Mine superfund site: a biological success story |
Type |
Journal Article |
| Year |
2003 |
Publication |
Tailings and Mine Waste '03 |
Abbreviated Journal |
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Pages |
481-485 |
| Keywords |
mine water treatment |
| Abstract |
Remediation of the Eagle Mine Superfund Site began in 1988. Remedial action included: bulk-heading adits, flooding mine workings; constructing diversion ditches around waste rock; consolidating mine wastes in an on-site tailings pile; capping the tailings pile with a multi-layer, engineered cap; and revegetating disturbed areas with native plants. Flooding the mine workings resulted in unacceptable seepage into the Eagle River in late 1989. A water treatment plant was constructed to collect mine seepage and groundwater at the main tailings pile. In October 2001, construction of the remedy was declared “complete” and the site is now in the operation, maintenance and monitoring phase. A strong downward trend in zinc and cadmium concentrations in the Eagle River has occurred and, trout and macroinvertebrate populations have increased. Biological data are being used to establish water quality standards for the Eagle River. |
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Remediation of the Eagle Mine superfund site: a biological success story; Isip:000186710100058; Times Cited: 0; ISI Web of Science |
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no |
| Call Number |
CBU @ c.wolke @ 17020 |
Serial |
157 |
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| Author |
Kuyucak, N.; Lindvall, M.; Rufo Serrano, J.A.; Oliva, A.F. |
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Book Whole |
| Year |
1999 |
Publication |
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Pages |
473-479 |
| Keywords |
HDS lime sludge mine water treatment |
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Lime neutralization is a frequently used method in the mining industry for the treatment of acid waters. These waters contain metal ions such as zinc, manganese, copper, cadmium, lead, etc. The conventional, straight lime neutralization technology generates a Low Density Sludge (LDS) having only 1-2% solids content. This creates sludge disposal difficulties, and results in the loss of potentially large quantities of recovered water, which in turn increases the demand for fresh water requirements for mining/milling activities. The High Density Sludge (HDS) process, on the other hand, is the state-of-the-art technology in North America. It generates a dense sludge with less volume and better particulate properties. Furthermore, the typical gelatinous nature of the sludge changes to a granulated, sand-like texture. Boliden Apirsa, S.L. investigated the feasibility of an HDS process to increase the treatment capacity of their existing plant, and resolve the issues associated with the LDS process for their Los Frailes project. The project required, given that the production of ore was going to be doubled, a significant increase in water was needed without altering the water reservoir sitting north of the concentrator. In addition, the final effluent quality was a priority issue. First, a pilot-scale study was undertaken in 1996, and parameters critical to the design and performance of the process were determined. The results showed that the HDS process could significantly improve the sludge characteristics by increasing the solids fraction from 1.5 to 12.0%, thereby decreasing the sludge volume to be disposed to the tailings ponds by a factor of 10. A full-scale, HDS lime neutralization treatment plant for an average flow rate of 1500 m3/hr was designed and was commissioned in early 1998 in collaboration with Colder Associates, Ottawa, Canada. So far, the full-scale treatment plant has been generating a sludge with more than 30% solids content, exceeding its target value of 12% solids. It produces excellent effluent quality, and scaling in the handling equipment is virtually eliminated. The sludge has dense, easily settable granular particles rather than fluffy flocs, yet has low viscosity that facilitates its unassisted gravity flow. The process has resulted in an increase in the treated water volume. The rate of lime consumption per unit volume of water treated also decreased. The process principles and the steps taken in process development will be discussed and the results obtained to date will be summarized in this communication. |
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International Mine Water Association |
Place of Publication |
Ii |
Editor |
Fernández Rubio, R. |
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Mine, Water & Environment |
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Implementation of a High Density Sludge “HDS” Treatment Process at the Boliden Apirsa Mine Site; 1; VORHANDEN | AMD ISI | Wolkersdorfer; FG als Datei vorhanden 4 Abb., 4 Tab. |
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CBU @ c.wolke @ 9751 |
Serial |
322 |
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| Author |
Turek, M. |
| Title |
Recovery of NaCl from saline mine water in the ED-MSF system |
Type |
Journal Article |
| Year |
2000 |
Publication |
8th World Salt Symposium, Vols 1 and 2 |
Abbreviated Journal |
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Issue |
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Pages |
471-475 |
| Keywords |
mine water treatment |
| Abstract |
A considerable part of water obtained by drainage of Polish coal-mines is saline which creates substantial ecological problems. The load of salt (mainly sodium chloride) amounts to 5 min t/year. Despite the utilisation of saline coalmine waters is considered to be the most adequate method of solving ecological problems caused by this kind of water in Poland there are only two installations utilising coal-mine waters and producing 100,000 t salt per year. In the case of the most concentrated waters, the so-called coal-mine brines, the method of concentrating by evaporation in twelve-stage expansion installation or vapour compression is applied, after which sodium chloride is manufactured. In the case of low salinity waters they are preconcentrated first by RO method. High energy consumption in above-mentioned methods of evaporation is a considerable restriction in the utilisation of coal-mine brines. An obstacle in the application of low energy evaporation processes, e.g. multi-stage flash, is the high concentration of calcium and sulphate ions in the coal-mine waters. |
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978-0-444-50065-6 |
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May; Recovery of NaCl from saline mine water in the ED-MSF system; Isip:000088786800075; Times Cited: 0; ISI Web of Science |
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no |
| Call Number |
CBU @ c.wolke @ 17092 |
Serial |
172 |
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