| Records |
| Author |
Hulshof, A.H.M.; Blowes, D.W.; Douglas Gould, W. |
| Title |
Evaluation of in situ layers for treatment of acid mine drainage: A field comparison |
Type |
Journal Article |
Year  |
2006 |
Publication |
Water Res |
Abbreviated Journal |
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| Volume |
40 |
Issue |
9 |
Pages |
1816-1826 |
| Keywords |
mine water Pollution and waste management non radioactive Groundwater problems and environmental effects acid mine drainage organic carbon oxidation microbial activity drainage groundwater pollution Bacteria microorganisms Contamination Groundwater Barriers Drainage Treatment |
| Abstract |
Reactive treatment layers, containing labile organic carbon, were evaluated to determine their ability to promote sulfate reduction and metal sulfide precipitation within a tailings impoundment, thereby treating tailings effluent prior to discharge. Organic carbon materials, including woodchips and pulp waste, were mixed with the upper meter of tailings in two separate test cells, a third control cell contained only tailings. In the woodchip cell sulfate reduction rates were 500 mg L-1 a-1, (5.2 mmol L-1 a-1) this was coupled with the gradual removal of 350 mg L-1 Zn (5.4 mmol L-1). Decreased δ13CDIC values from -3‰ to as low as -12‰ indicated that sulfate reduction was coupled with organic carbon oxidation. In the pulp waste cell the most dramatic change was observed near the interface between the pulp waste amended tailings and the underlying undisturbed tailings. Sulfate reduction rates were 5000 mg L-1 a-1 (52 mmol L-1 a-1), Fe concentrations decreased by 80–99.5% (148 mmol L-1) and Zn was consistently <5 mg L-1. Rates of sulfate reduction and metal removal decreased as the pore water migrated upward into the shallower tailings. Increased rates of sulfate reduction in the pulp waste cell were consistent with decreased δ13CDIC values, to as low as -22‰, and increased populations of sulfate reducing bacteria. Lower concentrations of the nutrients, phosphorus, organic carbon and nitrogen in the woodchip material contribute to the lower sulfate reduction rates observed in the woodchip cell. |
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0043-1354 |
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May; Evaluation of in situ layers for treatment of acid mine drainage: A field comparison; file:///C:/Dokumente%20und%20Einstellungen/Stefan/Eigene%20Dateien/Artikel/10040.pdf; Science Direct |
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CBU @ c.wolke @ 10040 |
Serial |
49 |
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| Author |
Sasaki, K. |
| Title |
Immobilization of Mn(II) ions by a Mn-oxidizing fungus – Paraconiothyrium sp.-like strain at neutral pHs |
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Journal Article |
| Year |
2006 |
Publication |
Mater. Trans. |
Abbreviated Journal |
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| Volume |
47 |
Issue |
10 |
Pages |
2457-2461 |
| Keywords |
mine water treatment |
| Abstract |
A Mn-oxidizing fungus was isolated from a constructed wetland of Hokkaido (Japan), which is receiving the Mn-impacted drainage, and genetically and morphologically identified as Paraconiothyrium sp.-like strain. The optimum pHs were 6.45-6.64, where is more acidic than those of previously reported Mn-oxidizing fungi. Too much nutrient inhibited fungal Mn-oxidation, and too little nutrient also delayed Mn oxidation even at optimum pH. In order to achieve the oxidation of high concentrations of Mn like mine drainage containing several hundreds g-m(-3) of Mn, it is important to find the best mix ratio among the initial Mn concentrations, inocolumn size and nutrient concentration. The strain has still Mn-tolerance with more than 380 g-m(-3) of Mn, but high Mn(II) oxidation was limited by pH control and supplied nutrient amounts. The biogenic Mn deposit was poorly crystallized birnessite. The strain is an unique Mn-oxidizing fungus having a high Mn tolerance and weakly acidic tolerance, since there has been no record about the property of the strain. There is a potentiality to apply the strain to the environmental bioremediation. |
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Immobilization of Mn(II) ions by a Mn-oxidizing fungus – Paraconiothyrium sp.-like strain at neutral pHs; Wos:000242429300002; Times Cited: 0; ISI Web of Science |
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CBU @ c.wolke @ 16940 |
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103 |
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Bearcock, J.M. |
| Title |
Accelerated precipitation of ochre for mine water remediation |
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Journal Article |
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2006 |
Publication |
Geochim. Cosmochim. Acta |
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70 |
Issue |
18 |
Pages |
A42-A42 |
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mine water treatment |
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Accelerated precipitation of ochre for mine water remediation; Wos:000241374200094; Times Cited: 0; ISI Web of Science |
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CBU @ c.wolke @ 16919 |
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104 |
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Macklin, M.G. |
| Title |
A geomorphological approach to the management of rivers contaminated by metal mining |
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Journal Article |
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2006 |
Publication |
Geomorphology |
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79 |
Issue |
3-4 |
Pages |
423-447 |
| Keywords |
mine water treatment |
| Abstract |
As the result of current and historical metal mining, river channels and floodplains in many parts of the world have become contaminated by metal-rich waste in concentrations that may pose a hazard to human livelihoods and sustainable development. Environmental and human health impacts commonly arise because of the prolonged residence time of heavy metals in river sediments and alluvial soils and their bioaccumulatory nature in plants and animals. This paper considers how an understanding of the processes of sediment-associated metal dispersion in rivers, and the space and timescales over which they operate, can be used in a practical way to help river basin managers more effectively control and remediate catchments affected by current and historical metal mining. A geomorphological approach to the management of rivers contaminated by metals is outlined and four emerging research themes are highlighted and critically reviewed. These are: (1) response and recovery of river systems following the failures of major tailings dams; (2) effects of flooding on river contamination and the sustainable use of floodplains; (3) new developments in isotopic fingerprinting, remote sensing and numerical modelling for identifying the sources of contaminant metals and for mapping the spatial distribution of contaminants in river channels and floodplains; and (4) current approaches to the remediation of river basins affected by mining, appraised in light of the European Union's Water Framework Directive (2000/60/EC). Future opportunities for geomorphologically-based assessments of mining-affected catchments are also identified. (c) 2006 Elsevier B.V. All rights reserved. |
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A geomorphological approach to the management of rivers contaminated by metal mining; Wos:000241084500014; Times Cited: 1; ISI Web of Science |
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CBU @ c.wolke @ 16934 |
Serial |
105 |
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Sierra-Alvarez, R. |
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Biological treatment of heavy metals in acid mine drainage using sulfate reducing bioreactors |
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Journal Article |
| Year |
2006 |
Publication |
Water Sci. Technol. |
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| Volume |
54 |
Issue |
2 |
Pages |
179-185 |
| Keywords |
mine water treatment |
| Abstract |
The uncontrolled release of acid mine drainage (AMD) from abandoned mines and tailing piles threatens water resources in many sites worldwide. AMD introduces elevated concentrations of sulfate ions and dissolved heavy metals as well as high acidity levels to groundwater and receiving surface water. Anaerobic biological processes relying on the activity of sulfate reducing bacteria are being considered for the treatment of AMD and other heavy metal containing effluents. Biogenic sulfides form insoluble complexes with heavy metals resulting in their precipitation. The objective of this study was to investigate the remediation of AMD in sulfate reducing bioreactors inoculated with anaerobic granular sludge and fed V with an influent containing ethanol. Biological treatment of an acidic (pH 4.0) synthetic AMD containing high concentrations of heavy metals (100 Mg Cu2+vertical bar(-1); 10 mg Ni2+vertical bar(-1), 10 mg Zn2+vertical bar(-1)) increased the effluent pH level to 7.0-7.2 and resulted in metal removal efficiencies exceeding 99.2%. The highest metal precipitation Cn rates attained for Cu, Ni and Zn averaged 92.5, 14.6 and 15.8 mg metal l(-1) of reactor d(-1). The results of this work demonstrate that an ethanol-fed sulfidogenic reactor was highly effective to remove heavy metal contamination and neutralized the acidity of the synthetic wastewater. |
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Biological treatment of heavy metals in acid mine drainage using sulfate reducing bioreactors; Wos:000240449300024; Times Cited: 0; ISI Web of Science |
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no |
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CBU @ c.wolke @ 16943 |
Serial |
106 |
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