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Author |
Sibrell, P.L. |
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Title |
ARD remediation with limestone in a CO2 pressurized reactor |
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Journal Article |
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2000 |
Publication |
ICARD 2000, Vols I and II, Proceedings |
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1017-1026 |
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mine water treatment |
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Abstract |
We evaluated a new process for remediation of acid rock drainage (ARD). The process treats ARD with intermittently fluidized beds of granular limestone maintained within a continuous now reactor pressurized with CO2. Tests were performed over a thirty day period at the Toby Creek mine drainage treatment plant, Elk County, Pennsylvania in cooperation with the Pennsylvania Department of Environmental Protection. Equipment performance was established at operating pressures of 0, 34, 82, and 117 kPa using an ARD flow of 227 L/min. The ARD had the following characteristics: pH, 3.1; temperature, 10 OC; dissolved oxygen, 6.4 mg/L; acidity, 260 mg/L; total iron, 21 mg/L; aluminum, 22 mg/L; manganese, 7.5 mg/L; and conductivity, 1400 muS/cm. In all cases tested, processed ARD was net alkaline with mean pH and alkalinities of 6.7 and 59 mg/L at a CO2 pressure of 0 kPa, 6.6 and 158 mg/L at 34 kPa, 7.4 and 240 mg/L at 82 kPa, and 7.4 and 290 mg/L at 117 kPa. Processed ARD alkalinities were correlated to the settled bed depth (p <0.001) and CO2 pressure (p <0.001). Iron, aluminum, and manganese removal efficiencies of 96%, 99%, and 5%, respectively, were achieved with filtration following treatment. No indications of metal hydroxide precipitation or armoring of the limestone were observed. The surplus alkalinity established at 82 kPa was successful in treating an equivalent of 1136 L/min (five-fold dilution) of the combined three ARD streams entering the Toby Creek Plant. This side-stream capability provides savings in treatment unit scale as well as flexibility in treatment effect. The capability of the system to handle higher influent acidity was tested by elevating the acidity to 5000 mg/L with sulfuric acid. Net alkaline effluent was produced, indicating applicability of the process to highly acidic ARD. |
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ARD remediation with limestone in a CO2 pressurized reactor; Isip:000169875500098; Times Cited: 0; ISI Web of Science |
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CBU @ c.wolke @ 17100 |
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169 |
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Author |
Jeffree, R.A. |
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Title |
Rum Jungle mine site remediation: Relationship between changing water quality parameters and ecological recovery in the Finniss River system |
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Journal Article |
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Year |
2000 |
Publication |
ICARD 2000, Vols I and II, Proceedings |
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759-764 |
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mine water treatment |
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The Finniss River system in tropical northern Australia has received 'acid-drainage' contaminants from the Rum Jungle uranium/copper mine site over the past 4 decades. Following mine-site remediation that began in 1981-82 the annual contaminant loads of sulfate, Cu, Zn and Mn have declined by factors of 3, 7, 5 and 4, respectively over 1990-93, compared to the 1969-74 pre-remediation loads. Comparison of the frequency distributions of contaminant water concentrations over these pre- and post-remedial periods have shown varying degrees of reduction in the highest levels following mine-site remediation, that are consistent with reductions in their annual-cycle loads. Among the three selected major metal contaminants the reductions in maximum water concentrations are most pronounced for Cu. The demonstrated reductions in the highest water concentrations of all four contaminants are also associated with previously reported ecological improvement in the Finniss River system, compared to the benchmark of environmental detriment established in 1973/74, prior to the beginning of remediation at the mine site. |
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Rum Jungle mine site remediation: Relationship between changing water quality parameters and ecological recovery in the Finniss River system; Isip:000169875500073; Times Cited: 0; ISI Web of Science |
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CBU @ c.wolke @ 17098 |
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170 |
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Rammlmair, D.; Grissemann, C. |
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Title |
Natural attenuation in slag heaps versus remediation |
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2000 |
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Applied mineralogy in research, economy, technology, ecology and culture |
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645-648 |
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acid mine drainage; alteration; concentration; concepts; crust; deposition; design; development; diagenesis; exhalative processes; fines; fluvial features; ground water; leaching; metallurgy; mining; mining geology; mobilization; natural attenuation; physicochemical properties; Plantae; pollution; precipitation; remediation; rivers; slag; time scales; toxic materials; transportation; volatiles; wind transport 22, Environmental geology |
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Rammlmair, D.; Mederer, J.; Oberthuer, T.; Heimann, R.B.; Pentinghaus, H.J. |
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9058091643 |
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Natural attenuation in slag heaps versus remediation; GeoRef; English; 2007-039910; Sixth international congress on Applied mineralogy in research, economy, technology, ecology, and culture, Gottingen, Federal Republic of Germany, July 17-19, 2000 References: 5; illus. |
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CBU @ c.wolke @ 5864 |
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266 |
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Author |
Feng, D.; Aldrich, C.; Tan, H. |
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Title |
Treatment of acid mine water by use of heavy metal precipitation and ion exchange |
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2000 |
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Minerals Engineering |
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13 |
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6 |
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623-642 |
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0892-6875 |
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Treatment of acid mine water by use of heavy metal precipitation and ion exchange; 1573889997; TU Berlin <83> TU Freiberg <105> TIB/UB Hannover <89>; OLC-SSG Technik – Online Contents-Sondersammelgebiete |
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CBU @ c.wolke @ 17618 |
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382 |
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Weeks, R.E.; Krohn, R.; Walker, T.H. |
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Title |
Water management during the Pinto Valley removal action |
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Conference Article |
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2000 |
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Tailings and Mine and Waste 2000, Proceedings of the Seventh International Conference, Fort Collins, US, Jan 22 26, 2000 |
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499-506 |
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Bergbau Erzbergbau Erzaufbereitung Damm Gewässerschutz Umweltschutz Grundwasser Rekultivierung Versatzgut Abtragen Niederschlag=Atmosphäre Dammbruch Wassermanagement |
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Der Bruch des Dammes einer Halde der Grube Nr. 14 des Kupfer- Bergbaubetriebes Pinto Valley in Arizona, USA, im Jahre 1997 führte zum Eintrag von 370000 yd(exp 3) Bergematerials und Tailings in das Bett des Flusses Pinto Creek, USA, wodurch letzteres blockiert wurde. Der Vorfall ereignete sich in bergigem Gelände unterhalb eines 14 Quadratmeilen großen Abschnittes des Flusseinzugsgebietes oberhalb des Sees Roosevelt Lake, USA, einer Trinkwasserquelle für Phoenix, USA. Aufgrund der Bedeutung des Gebietes wurde eine Strategie zur Verhütung weiterer Beeinträchtigungen der Wasserqualität ausgearbeitet. Diese beinhaltete Managementaspekte zur Gewährleistung einer schnellen Planung und Ausführung der notwendigen Arbeiten gekoppelt mit der Planung, dem Bau und dem Betrieb von Rückhalte und Umleitungssystemen für auftretende Wässer. Die Auslegung dieser Systeme erfolgte auf der Grundlage der Daten des Einzugsgebietes und der klimatischen Verhältnisse, wobei verschiedene Wahrscheinlichkeiten der Überschreitung der ermittelten Werte berücksichtigt wurden. Innerhalb von acht Monaten konnten die Tailings aus dem betroffenen Gebiet entfernt werden, ohne dass belastete Oberflächenwässer freigesetzt wurden. |
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Golder Associates, Phoenix, US; BHP Copper, Miami, US; AGRA Earth & Environmental, Phoenix, US |
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Water management during the Pinto Valley removal action; BERG, Copyright FIZ Technik e.V.; EN Englisch; 90-5809-126-0; 200007 03261; 22520, BERG , 25.09.00; Words: 374; 8 Seiten, 1 Bild, 3 Quellen 3MZ *Bergbau, Tunnelbau, Erdöl /Erdgasförderung, Bohrtechnik* 3UX *Umweltbelastung, technik* |
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CBU @ c.wolke @ 17593 |
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215 |
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