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Rabenhorst, M.C.; James, B.R. |
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Title |
Acid mine drainage remediation via sulfidization in wetlands Fiscal year 1992 annual report |
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1993 |
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acid mine drainage; anaerobic environment; Appalachians; concentration; decontamination; ferric iron; iron; manganese; marshes; Maryland; metals; mires; North America; oxidation; pollutants; pollution; pore water; remediation; sulfidization; transport; United States; water quality; water treatment; wetlands 22, Environmental geology |
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University of Maryland, W.R.R.C.C.P.M.D.U.S. |
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Acid mine drainage remediation via sulfidization in wetlands Fiscal year 1992 annual report; 1998-034327; GeoRef; English; illus. incl. 1 table University of Maryland, Water Resources Research Center, College Park, MD, United States |
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CBU @ c.wolke @ 6684 |
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267 |
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Amacher, M.C.; Brown, R.W.; Kotuby-Amacher, J.; Willis, A. |
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Adding sodium hydroxide to study metal removal in a stream affected by acid mine drainage |
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1993 |
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Research Paper, US Department of Agriculture, Forest Service |
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465 |
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17 |
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pH stream mine drainage remediation zinc copper sodium hydroxide USa Montana Beartooth Mountains Fisher Creek 3 Geology |
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Fisher Creek, a stream affected by acid mine drainage in the Beartooth Mountains of Montana, was studied to determine the extent to which copper (Cu) and zinc (Zn) would be removed from stream water when pH was increased by a pulse of sodium hydroxide (NaOH). Although the pH adjustment study indicated that precipitated Fe(OH) “SUB 3” (am) could rapidly remove Cu and Zn from a stream affected by acid mine drainage, the pH should be maintained in an optimal range (7 to 8.5) to maximize removal by adsorption. -from Authors |
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Adding sodium hydroxide to study metal removal in a stream affected by acid mine drainage; (1022908); 94k-02459; Using Smart Source Parsing INT- pp; Geobase |
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CBU @ c.wolke @ 17566 |
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484 |
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Diamond, J.M.; Bower, W.; Gruber, D. |
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Title |
Use of man-made impoundment in mitigating acid mine drainage in the North Branch Potomac River |
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Journal Article |
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1993 |
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Environ. Manage. |
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17 |
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14 |
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Acid mine drainage Potomac River Reservoir macroinvertebrate Fish Mayflies |
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The US Department of the Army, Baltimore District Corps of Engineers, oversees a long-term monitoring study to assess and evaluate effects of the Jennings-Randolph reservoir on biota in the North Branch Potomac River. The reservoir was intended, in part, to mitigate effects of acid mine drainage originating in upstream and headwater areas. The present study assessed recovery of benthos and fish in this system, six years after completion of the reservoir. Higher pH and lower iron and sulfate concentrations were observed upstream of the reservoir compared to preimpoundment conditions, suggesting better overall water quality in the upper North Branch. Water quality improved slightly directly downstream of the reservoir. However, the reservoir itself was poorly colonized by macrophytes and benthic organisms, and plankton composition suggested either metal toxicity and/or nutrient limitation. One large tributary to the North Branch and the reservoir (Stony River) was shown to have high (and possibly toxic) levels of manganese, iron, zinc, and aluminum due to subsurface coal mine drainage. Macroinvertebrate diversity and number of taxa were higher in sites downstream of the reservoir in the present study. Compared with previous years, the present study suggested relatively rapid recovery in the lower North Branch due to colonization from two major unimpacted tributaries in this system: Savage River and South Branch Potomac. Abundance of certain mayfly species across sites provided the most clear evidence of longitudinal gradients in water quality parameters and geomorphology. Fish data were consistent with macroinvertebrate results, but site-to-site variation in species composition was greater. Data collected between 1982 and 1987 suggested that certain fish species have unsuccessfully attempted to colonize sites directly downstream of the reservoir despite the more neutral pH water there. Our results show that recovery of biota in the North Branch Potomac was attributed to decreased acid inputs from mining operations and dilution from the Savage River, which contributed better water quality. Continued improvement of North Branch Potomac biota may not be expected unless additional mitigation attempts, either within the reservoir or upstream, are undertaken. |
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0364-152x |
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Feb.; Use of man-made impoundment in mitigating acid mine drainage in the North Branch Potomac River; New York, NY ; Heidelberg ; Berlin : Springer; file:///C:/Dokumente%20und%20Einstellungen/Stefan/Eigene%20Dateien/Artikel/7016.pdf; Opac |
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CBU @ c.wolke @ 7016 |
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79 |
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Author |
Guo, F.; Yu, H. |
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Hydrogeochemistry and treatment of acid mine drainage in southern China |
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1993 |
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Proceedings of the Annual National Meeting – American Society for Surface Mining and Reclamation, vol.10 |
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277-283 |
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acid mine drainage Asia bacteria chemical reactions China coal mines ecology Far East geochemistry hydrochemistry Jiangxi China lime mines oxidation pH pollution sulfides surface water trace elements water quality 22 Environmental geology 02B Hydrochemistry |
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Coal mines and various sulfide ore deposits are widely distributed in Southern China. Acid mine drainage associated with coal and metal sulfide deposits affects water quality in some mined areas of Southern China. Mining operations accelerate this natural deterioration of water quality by exposing greater surface areas of reactive minerals to the weathering effects of the atmosphere, hydrosphere, and biosphere. Some approaches to reduce the effects of acid mine drainage on water quality are adopted, and they can be divided into two aspects: (a) Man-made control technology based on long-term monitoring of acid mine drainage; and, (b) Neutralization of acidity through the addition of lime. It is important that metals in the waste water are removed in the process of neutralization. A new method for calculating neutralization dosage is applied. It is demonstrated that the calculated value is approximately equal to the actual required value. |
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Zamora, B.A.; Connolly, R.E. |
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The challenge of integrating diverse perspectives in reclamation |
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Hydrogeochemistry and treatment of acid mine drainage in southern China; GeoRef; English; 2002-028935; 10th annual national meeting of the American Society for Surface Mining and Reclamation, Spokane, WA, United States, May 16, 1993 References: 3; illus. incl. 4 tables |
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CBU @ c.wolke @ 16744 |
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366 |
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Eger, P.; Melchert, G.; Antonson, D.; Wagner, J. |
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Title |
Magnesium hydroxide as a treatment for acid mine drainage in northern Minnesota |
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1993 |
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Proceedings of the Annual National Meeting – American Society for Surface Mining and Reclamation, vol.10 |
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204-217 |
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acid mine drainage acidification alkaline earth metals chemical properties cobalt copper drainage experimental studies hydroxides laboratory studies lime magnesium magnesium hydroxide metals Minnesota nickel northern Minnesota oxides pH pollution porous materials reagents remediation residence time trace metals United States waste disposal zinc 22, Environmental geology |
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Three alkaline materials were investigated for their suitability to treat acid mine drainage generated by a research facility located at a remote site in northern Minnesota. The materials investigated were hydrated lime, sodium hydroxide, and magnesium hydroxide. All three reagents were successful at raising pH and removing trace metals from the drainage, but the magnesium hydroxide had the added benefit of producing a maximum pH of approximately 9.5, while the other two reagents resulted in pH values of 12 and greater. In addition, the magnesium hydroxide was available as a high solid content slurry (58%) which simplified application and handling, and which produced the lowest volume of sludge of the materials tested. |
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Zamora, B.A.; Connolly, R.E. |
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The challenge of integrating diverse perspectives in reclamation |
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Magnesium hydroxide as a treatment for acid mine drainage in northern Minnesota; GeoRef; English; 2002-028930; 10th annual national meeting of the American Society for Surface Mining and Reclamation, Spokane, WA, United States, May 16, 1993 References: 7; illus. incl. 4 tables |
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CBU @ c.wolke @ 16743 |
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393 |
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