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Author |
Zinck, J. |
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Year |
2006 |
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2604-2617 |
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Keywords  |
mine water lime treatment high density sludge process co-disposal sludge stability pond disposal backfill leaching mine reclamation |
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Abstract |
Sludge management is an escalating concern as the inventory of sludge continues to grow through perpetual “pump and treat” of acidic waters at mine sites. Current sludge management practices, in general, are ad hoc and frequently do not adress long-term storage, and in some cases, long-term stability. While a variety of sludge disposal practices have been applied, many have not been fully investigated and monitoring data on the performance of these technologies is limited and not readily available. This paper discusses options for treatment sludge management including conventionale disposal technologies and options for reclamation of sludge areas. |
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Proceedings, International Conference of Acid Rock Drainage (ICARD) |
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St. Louis |
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Icard 2006 |
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Disposal, reprocessing and reuse options for acidic drainage treatment sludge; 2; AMD ISI | Wolkersdorfer; 2 Abb. |
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CBU @ c.wolke @ 17455 |
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184 |
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Author |
Kuyucak, N. |
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Title |
Mining, the Environment and the Treatment of Mine Effluents |
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Journal Article |
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Year |
1998 |
Publication |
Int. J. Environ. Pollut. |
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10 |
Issue |
2 |
Pages |
315-325 |
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Keywords |
mine water treatment acid mine drainage high density sludge lime neutralization mining environment passive treatment sulfate-reducing bacteria |
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Abstract |
The environmental impact of mining on the ecosystem, including land, water and air, has become an unavoidable reality. Guidelines and regulations have been promulgated to protect the environment throughout mining activities from start-up to site decommissioning. In particular, the occurrence of acid mine drainage (AMD), due to oxidation of sulfide mineral wastes, has become the major area of concern to many mining industries during operations and after site decommissioning. AMD is characterized by high acidity and a high concentration of sulfates and dissolved metals. If it cannot be prevented or controlled, it must be treated to eliminate acidity, and reduce heavy metals and suspended solids before release to the environment. This paper discusses conventional and new methods used for the treatment of mine effluents, in particular the treatment of AMD. |
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0957-4352 |
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Mining, the Environment and the Treatment of Mine Effluents; Isi:000078420600009; AMD ISI | Wolkersdorfer |
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Call Number |
CBU @ c.wolke @ 17477 |
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56 |
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Author |
Watzlaf, G.R.; Schroeder, K.T.; Kairies, C.L. |
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Book Whole |
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Year |
2000 |
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262-274 |
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Keywords |
passive treatment anoxic limestone drains wetlands sulfate reduction successive alkalinity-producing systems acid mine drainage ALD SAPS RAPS |
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Abstract |
Ten passive treatment systems, located in Pennsylvania and Maryland, have been intensively monitored for up to ten years. Influent and effluent water quality data from ten anoxic limestone drains (ALDs) and six reducing and alkalinity-producing systems (RAPS) have been analyzed to determine long-term performance for each of these specific unit operations. ALDs and RAPS are used principally to generate alkalinity, ALDs are buried beds of limestone that add alkalinity through dissolution of calcite. RAPS add alkalinity through both limestone dissolution and bacterial sulfate reduction. ALDs that received mine water containing less than 1 mg/L of both ferric iron and aluminum have continued to produce consistent concentrations of alkalinity since their construction. However, an ALD that received 20 mg/L of aluminum experienced a rapid reduction in permeability and failed within five months. Maximum levels of alkalinity (between 150 and 300 m&) appear to be reached after I5 hours of retention. All but one RAPS in this study have been constructed and put into operation only within the past 2.5 to 5 years. One system has been in operation and monitored for more than nine years. AIkalinity due to sulfate reduction was highest during the first two summers of operation. Alkalinity due to a limestone dissolution has been consistent throughout the life of the system. For the six RAPS in this study, sulfate reduction contributed an average of 28% of the total alkalinity. Rate of total alkalinity generation range from 15.6 gd''rn-'to 62.4 gd-'mL2 and were dependent on influent water quality and contact time. |
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Tampa |
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Proceedings, 17th Annual National Meeting – American Society for Surface Mining and Reclamation |
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Long-Term Perpormance of Alkalinity-Producing Passive Systems for the Treatment of Mine Drainage; 2; VORHANDEN | AMD ISI | Wolkersdorfer; als Datei vorhanden 4 Abb., 5 Tab. |
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no |
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Call Number |
CBU @ c.wolke @ 17440 |
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216 |
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Author |
Zinck, J.M.; Aube, B.C. |
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Title |
Optimization of lime treatment processes |
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Journal Article |
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Year |
2000 |
Publication |
CIM Bull. |
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Volume |
93 |
Issue |
1043 |
Pages |
98-105 |
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Pollution and waste management non radioactive Groundwater problems and environmental effects geological abstracts: environmental geology (72 14 2) geomechanics abstracts: excavations (77 10 10) acid mine drainage buffering lime Canada |
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Lime neutralization technology is widely used in Canada for the treatment of acid mine drainage and other acidic effluents. In many locations, improvements to the lime neutralization process are necessary to achieve a maximum level of sludge densification and stability. Conventional lime neutralization technology effectively removes dissolved metals to below regulated limits. However, the metal hydroxide and gypsum sludge generated is voluminous and often contains less than 5% solids. Despite recent improvements in the lime neutralization technology, each year, more than 6 700 000 m3 of sludge are generated by treatment facilities operated by the Canadian mining industry. Because lime neutralization is still seen as the best available approach for some sites, sludge production and stability are expected to remain as issues in the near future. Several treatment parameters significantly impact operating costs, effluent quality, sludge production and the geochemical stability of the sludge. Studies conducted both at CANMET and NTC have shown that through minor modifications to the treatment process, plant operators can experience a reduction in operating costs, volume of sludge generated, metal release to the environment and liability. This paper discusses how modifications in plant operation and design can reduce treatment costs and liability associated with lime treatment. |
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Address |
J.M. Zinck, CANMET, Mining and Mineral Sciences Lab., Natural Resources Canada, Ottawa, Ont., Canada |
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ISSN |
0317-0926 |
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Optimization of lime treatment processes; 2291672; Canada 17; Geobase |
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Call Number |
CBU @ c.wolke @ 17537 |
Serial |
183 |
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