| Records |
Author  |
Younger, P.L. |
| Title |
The adoption and adaptation of passive treatment technologies for mine waters in the United Kingdom |
Type |
Journal Article |
| Year |
2000 |
Publication |
Mine Water Env. |
Abbreviated Journal |
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| Volume |
19 |
Issue |
2 |
Pages |
84-97 |
| Keywords |
wetlands SAPS aerobic wetlands acidity aerobic anaerobic compost iron metals passive reactive barrier water treatment |
| Abstract |
During the 1990s, passive treatment technology was introduced to the United Kingdom (UK). Early hesitancy on the part of regulators and practitioners was rapidly overcome, at least for net-alkaline mine waters, so that passive treatment is now the technology of choice for the long-term remediation of such discharges, wherever land availability is not unduly limiting. Six types of passive systems are now being used in the UK for mine water treatment: ¨ aerobic, surface flow wetlands (reed-beds); ¨ anaerobic, compost wetlands with significant surface flow; ¨ mixed compost / limestone systems, with predominantly subsurface flow (so-called Reducing and Alkalinity Producing Systems (RAPS)); ¨ subsurface reactive barriers to treat acidic, metalliferous ground waters; ¨ closed-system limestone dissolution systems for zinc removal from alkaline waters; ¨ roughing filters for treating ferruginous mine waters where land availability is limited. Each of these technologies is appropriate for a different kind of mine water, or for specific hydraulic circumstances. The degree to which each type of system can be considered “proven technology” corresponds to the order in which they are listed above. Many of these passive systems have become foci for detailed scientific research, as part of a $1.5M European Commission project running from 2000 to 2003. |
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1025-9112 |
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The adoption and adaptation of passive treatment technologies for mine waters in the United Kingdom; 1; FG 5 Abb., 1 Tab.; AMD ISI | Wolkersdorfer |
Approved |
no |
| Call Number |
CBU @ c.wolke @ 17448 |
Serial |
198 |
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| Author |
Zinck, J.M.; Aube, B.C. |
| Title |
Optimization of lime treatment processes |
Type |
Journal Article |
| Year |
2000 |
Publication |
CIM Bull. |
Abbreviated Journal |
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| Volume |
93 |
Issue |
1043 |
Pages |
98-105 |
| Keywords |
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 |
| Abstract |
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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J.M. Zinck, CANMET, Mining and Mineral Sciences Lab., Natural Resources Canada, Ottawa, Ont., Canada |
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0317-0926 |
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Optimization of lime treatment processes; 2291672; Canada 17; Geobase |
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CBU @ c.wolke @ 17537 |
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183 |
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Zou, L.H. |
| Title |
Sulfide precipitation flotation for treatment of acidic mine waste water |
Type |
Journal Article |
| Year |
2000 |
Publication |
Transactions of Nonferrous Metals Society of China |
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10 |
Issue |
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Pages |
106-109 |
| Keywords |
mine water treatment |
| Abstract |
Sulfide precipitation flotation of copper-iron-bearing acidic waste water from a large copper mine and the stimulated waste water were studied. The pH of the waste water was 2.2, with 130 mg/L Cu2+ and 500 mg/L Fe3+ (Fe2+). Results show that, when Na2S was added as precipitating agent, sodium butylxanthate as collector and at pH 2.0, the removal of copper could be as high as 99.7 % and the residual copper decreased to 0.2 mg/L, however, almost no iron was removed. When the floated solution was neutralized to pH = 8.0, more than 98 % iron was precipitated and the residual iron was less than 10 mg/L. In experiment on actual mine effluents, after the use of precipitate flotation technology to recover copper and pH neutralization to precipitate iron, the treated waste water does meet the emission standards for sewage and valuable floating copper graded 37.12%. The chemical calculation and mechanism of solution were also presented. |
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Sulfide precipitation flotation for treatment of acidic mine waste water; Wos:000088249500025; Times Cited: 0; ISI Web of Science |
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CBU @ c.wolke @ 17086 |
Serial |
128 |
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