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Author |
Younger, P.L.; Banwart, S.A.; Hedin, R.S. |
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Book Whole |
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Year |
2002 |
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Abbreviated Journal |
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Keywords |
acid mine drainage acidification active treatment aquifer vulnerability aquifers bioremediation chemical composition critical load decision-making discharge engineering properties geomembranes ground water impact statements karst hydrology microorganisms mine dewatering mines natural attenuation pollution regulations remediation risk assessment sedimentation sludge solute transport surface water tailings tailings ponds waste management water management water pollution water quality weathering wetlands 22, Environmental geology |
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Kluwer Academic Publishers |
Place of Publication |
Dordrecht |
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Alloway, B.J.; Trevors, J.T. |
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Series Title |
Mine water; hydrology, pollution, remediation |
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140200138x; 1202001371 |
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Mine water; hydrology, pollution, remediation; 2003-030514; GeoRef; English; Includes appendix References: 516; illus. |
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Call Number  |
CBU @ c.wolke @ 16504 |
Serial |
196 |
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Author |
Aube, B.C.; Zinck, J.M. |
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Title |
Comparison of AMD treatment processes and their impact on sludge characteristics |
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Journal Article |
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Year |
1999 |
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Keywords |
acid mine drainage cost decontamination density discharge geochemistry hydrochemistry leaching lime metals mine dewatering neutralization pH pollution remediation sludge stability tailings toxicity viscosity waste disposal water treatment 22, Environmental geology |
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Abstract |
Lime neutralisation for the treatment of acid mine drainage is one of the oldest water pollution control techniques practised by the mineral industry. Several advances have been made in the process in the last thirty years, particularly with respect to discharge concentrations and sludge density. However, the impact of different treatment processes on metal leachability and sludge handling properties has not been investigated. A study of treatment sludges sampled from various water treatment plants has shown that substantial differences can be related to the treatment process and raw water composition. This study suggests that sludge densities, excess alkalinity, long-term compaction properties, metal leachability, crystallinity and cost efficiency can be affected by the neutralisation process and specific process parameters. The study also showed that the sludge density and dewatering ability is not positively correlated with particle size as previously suggested in numerous studies. The treatment process comparisons include sludge samples from basic lime treatment, the conventional High Density Sludge (HDS) Process, and the Geco HDS Process. |
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Sudbury |
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Series Title |
Mining and the Environment II |
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2002-060865; Sudbury '99; Mining and the environment II--Sudbury '99; L'exploitation miniere et l'environnement, Sudbury, ON, Canada, Sept. 13-17, 1999 References: 10; illus. incl. 6 tables; GeoRef; English |
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no |
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Call Number |
CBU @ c.wolke @ 16574 |
Serial |
473 |
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Author |
Mitchell, P.; Wheaton, A. |
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Title |
From environmental burden to natural resource; new reagents for cost-effective treatment of, and metal recovery from, acid rock drainage |
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Book Chapter |
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Year |
1999 |
Publication |
Sudbury '99; Mining and the environment II; Conference proceedings |
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Keywords |
acid mine drainage Bunker Hill Mine cost decontamination Idaho metal ores mines mitigation natural resources pollution reagents recovery Shoshone County Idaho sludge United States zinc ores 22 Environmental geology 27A Economic geology, geology of ore deposits |
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Abstract |
Acid rock drainage remains the greatest environmental issue faced by the mining sector and as the new millennium approaches, low capital/operating cost treatments remain elusive. Therefore as part of an ongoing process to develop a leading edge, innovative and cost-effective approach, pilot trials were conducted by KEECO in collaboration with the New Bunker Hill Mining Company on a substantial and problematic metal-contaminated acid flow, emanating from underground workings at the Bunker Hill Mine, Idaho. The aims of the work were fourfold. First to assess the capacity of KEECO's unique Silica Micro Encapsulation (SME) reagents and associated dosing systems to cost-effectively decontaminate the acid flow to stringent standards set by the U.S. Environmental Protection Agency (USEPA), where alternative and standard technologies had failed. Second, to demonstrate that treatment using a compact system suitable for underground installation. Third, to demonstrate that the treatment sludge had enhanced chemical stability in absolute terms and relative to standard approaches. Fourth, to examine the potential for resource recovery via sequential precipitation. Although the focus to date has been the development of a cost-effective treatment technology, the latter aim was considered essential in light of the growing pressure on all industrial sectors to develop tools for environmentally sustainable economic growth and the growing demands of stakeholders for improved resource usage and recycling. Two phases of work were undertaken: a laboratory-based scoping exercise followed by installation within the mine workings of a compact reagent delivery/shear mixing unit capable of treating the full flow of 31 L s (super -1) . At a dose rate of 2.0 g L (super -1) (equivalent to a final treated water pH range of 7-9), the SME reagent KB-1 reduced metal concentrations to levels approaching the U.S. Drinking Water Standards, which no other treatment piloted at the site had achieved. Based on the USEPA's Toxicity Characteristic Leaching Procedure, the sludge arising from the treatment was classified as non-hazardous. Operating costs compared favourably with those of lime use, while estimated capital costs were considerably lower due to the compact nature of the reagent delivery system and the rapid settling characteristics of the treatment sediment. Resource recovery was attempted using a two-stage selective precipitation approach. The first stage involved pH adjustment to 5.5 (by addition of 1.5 g L (super -1) of KB-1) to produce a sludge enriched in aluminium, iron and manganese, with lesser amounts of arsenic, nickel, lead and zinc. Further KB-1 addition to a total of 2.1 g L (super -1) generated sludge enriched in zinc (33% by dry weight), demonstrating that resource recovery is theoretically feasible. Further work on downstream processing is required, although it is considered that the most likely route for zinc metal recovery will be high temperature/pressure due to the chemically inert nature of the zinc-rich sediment. |
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Goldsack, D.E.; Belzile, N.; Yearwood, P.; Hall, G.J. |
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0886670470 |
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Notes |
From environmental burden to natural resource; new reagents for cost-effective treatment of, and metal recovery from, acid rock drainage; GeoRef; English; 2000-048642; Sudbury '99; Mining and the environment II, Sudbury, ON, Canada, Sept. 13-17, 1999 References: 3; illus. incl. 5 tables |
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no |
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Call Number |
CBU @ c.wolke @ 16593 |
Serial |
296 |
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Author |
Okuda, T.; Ema, S.; Ishizaki, C.; Fujimoto, J. |
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Title |
Mine drainage treatment and ferrite sludge application |
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Journal Article |
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Year |
1991 |
Publication |
NEC Technical Journal |
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44 |
Issue |
5 |
Pages |
4-16 |
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Keywords |
ferrite applications mining water treatment mine drainage treatment waste water treatment ions metal recovery catalysts environmental problems solution ferrite sludge application iron oxidation bacteria ferrite formation process mine drainage Matsuo Mine magnetic marking materials magnetic fluid metal separation semiactive magnetic damper batteries fish gathering cement tracer Electrical and Electronic Engineering Manufacturing and Production |
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Abstract |
The `ferrite process' is an excellent method for treating waste water containing iron and arsenic, but cannot be directly applied to mine drainage where silicon and aluminum ions are present, because they strongly inhibit ferrite formation. As a result of the development of related technologies such as the elimination of silicon, the concentration of iron, and the oxidation of ferrous ions using iron-oxidation bacteria, a new ferrite formation process has been developed and applied to the mine drainage of the Matsuo Mine. The paper discusses the application of the ferrite sludge to magnetic marking materials, magnetic fluid for metal separation and recovery, and the semiactive magnetic damper is described. The related technologies which will be expected to play an important role in solving the environmental problems are also described. These technologies will change the ferrite sludge to beneficial materials, which can be used for carbon dioxide decomposing catalysts, reuse of dry batteries, fish gathering blocks, and cement tracer for ground improvement |
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0285-4139 |
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Notes |
Mine drainage treatment and ferrite sludge application; 3991072; Journal Paper; SilverPlatter; Ovid Technologies |
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no |
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Call Number |
CBU @ c.wolke @ 16787 |
Serial |
279 |
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Author |
Heal, K.V.; Salt, C.A. |
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Title |
Treatment of acidic metal-rich drainage from reclaimed ironstone mine spoil |
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Journal Article |
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Year |
1999 |
Publication |
Water Sci. Technol. |
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39 |
Issue |
12 |
Pages |
141-148 |
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Keywords |
Acid mine drainage constructed wetland mine waste reclamation sewage sludge |
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Abstract |
Ironstone mine spoil leaves a legacy of land contamination and diffuse water pollution with acidic, metal-rich drainage. Reclamation for woodland may exacerbate water pollution due to spoil amendment and disturbance. Constructed wetland systems (CWS) are increasingly used for treating acid mine drainage but their performance is poorly understood. A combined approach was used to reclaim the Benhar ironstone spoil heap in Central Scotland. Trees have been planted in spoil treated with dried pelleted sewage sludge, limestone and peat. Spoil drainage (pH 2.7, 247 mg l-1 total Fe) passes through a CWS. Spoil throughflow, surface water chemistry and CWS performance were monitored for 12 months after reclamation. Acidity, Fe, Mn and Al concentrations declined in throughflow after reclamation, although this effect was not uniform. Soluble reactive P has been mobilised from the sewage sludge in residual areas of spoil acidity, but losses of other nutrients were short-lived. The CWS removes on average 33 % and 20-40 % of acidity and metal inputs but removal rates decrease in winter. Spoil reclamation has been successful in enabling vegetation establishment but has also increased Fe and Mn concentrations in surface drainage from the site, even after passage through the CWS. |
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Treatment of acidic metal-rich drainage from reclaimed ironstone mine spoil; Science Direct |
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no |
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Call Number |
CBU @ c.wolke @ 17272 |
Serial |
45 |
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