| Records |
| Author |
Sierra-Alvarez, R. |
| Title |
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. |
Abbreviated Journal |
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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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| Call Number |
CBU @ c.wolke @ 16943 |
Serial |
106 |
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| Author |
Whitehead, P.G. |
| Title |
Bioremediation of acid mine drainage: an introduction to the Wheal Jane wetlands project |
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Journal Article |
| Year |
2005 |
Publication |
Science of the Total Environment |
Abbreviated Journal |
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| Volume |
338 |
Issue |
1-2 |
Pages |
15-21 |
| Keywords |
mine water treatment |
| Abstract |
Acid mine drainage (AMD) is a widespread environmental problem associated with both working and abandoned mining operations. As part of an overall strategy to determine a long-term treatment option for AMD, a pilot passive treatment plant was constructed in 1994 at Wheat Jane Mine in Cornwall, UK. The plant consists of three separate systems; each containing aerobic reed beds, anaerobic cell and rock filters, and represents the largest European experimental facility of its kind. The systems only differ by the type of pre-treatment utilised to increase the pH of the influent minewater (pH<4): lime-dosed (LD), anoxic limestone drain (ALD) and lime free (LF), which receives no form of pre-treatment. The Wheal Jane pilot plant offered a unique facility and a major research project was established to evaluate the pilot plant and study in detail the biological mechanisms and the geochemical and physical processes that control passive treatment systems. The project has led to data, knowledge, models and design criteria for the future design, planning and sustainable management of passive treatment systems. A multidisciplinary team of scientists and managers from the U.K. universities, the Environment Agency and the Mining Industry has been put together to obtain the maximum advantage from the excellent facilities facility at Wheal Jane. (C) 2004 Elseaier B.V All rights reserved. |
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Bioremediation of acid mine drainage: an introduction to the Wheal Jane wetlands project; Wos:000227130400003; Times Cited: 1; ISI Web of Science |
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CBU @ c.wolke @ 16972 |
Serial |
116 |
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Olaniran, A.O. |
| Title |
Biostimulation and bioaugmentation enhances aerobic biodegradation of dichloroethenes |
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Journal Article |
| Year |
2006 |
Publication |
Chemosphere |
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63 |
Issue |
4 |
Pages |
600-608 |
| Keywords |
mine water treatment |
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The accumulation of dichloroethenes (DCEs) as dominant products of microbial reductive dechlorination activity in soil and water represent a significant obstacle to the application of bioremediation as a remedial option for chloroethenes in many contaminated systems. In this study, the effects of biostimulation and/or bioaugmentation on the biodegradation of cis- and trans-DCE in soil and water samples collected from contaminated sites in South Africa were evaluated in order to deter-mine the possible bioremediation option for these compounds in the contaminated sites. Results from this study indicate that cis- and trans-DCE were readily degraded to varying degrees by natural microbial populations in all the soil and water samples tested, with up to 44% of cis-DCE and 41% of trans-DCE degraded in the untreated soil and water samples in two weeks. The degradation rate constants ranged significantly (P < 0.05) between 0.0938 and 0.560 wk(-1) and 0.182 and 0.401 wk(-1), for cis- and trans-DCE, respectively, for the various treatments employed. A combination of biostimulation and bioaugmentation significantly increased the biodegradation of both compounds within two weeks; 14% for cis-DCE and 18% for trans-DCE degradation, above those observed in untreated soil and water samples. These findings support the use of a combination of biostimulation and bioaugmentation for the efficient biodegradation of these compounds in contaminated soil and water. In addition, the results clearly demonstrate that while naturally occurring microorganisms are capable of aerobic biodegradation of cis- and trans-DCE, biotransformation may be affected by several factors, including isomer structure, soil type, and the amount of nutrients available in the water and soil. (c) 2005 Elsevier Ltd. All rights reserved. |
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Biostimulation and bioaugmentation enhances aerobic biodegradation of dichloroethenes; Wos:000237379500007; Times Cited: 0; ISI Web of Science |
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CBU @ c.wolke @ 16936 |
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111 |
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| Author |
Fricke, J.; Blickwedel, R.; Hagerty, P. |
| Title |
Biotreatment of metal mine waste waters; case histories |
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Journal Article |
| Year |
1997 |
Publication |
Open-File Report – US Geological Survey |
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Of 97-0496 |
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25 |
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abandoned mines acid mine drainage bacteria bioremediation chemical composition concentration efficiency geochemistry metals mines pollution remediation USGS waste water water quality water treatment |
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0196-1497 |
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Biotreatment of metal mine waste waters; case histories; 1; GeoRef: 98-68755 160101 / € 0; AMD ISI | Wolkersdorfer |
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CBU @ c.wolke @ 9627 |
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375 |
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Botha, G.R.; Sanderson, R.D.; Buckley, C.A. |
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Brief Historical Review of Membrane-development and Membrane Applications in Waste-water Treatment in Southern Africa |
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Journal Article |
| Year |
1992 |
Publication |
Water Sci. Technol. |
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25 |
Issue |
10 |
Pages |
1-4 |
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membranes reverse osmosis ultrafiltration microfiltration desalination waste-water treatment industrial effluents |
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Away back in 1953 few people in the world, let alone South Africa, knew or had heard about membrane desalination, but there was an increasing awareness that electrodialysis had considerable potential for the desalination of brackish water.In South Africa the development of the new gold fields in the northern Orange Free State and the problems posed by the presence of excessive volumes of very saline mine waters stimulated interest in desalination and the CSIR* in collaboration with the mining industry became involved in the development of the electrodialysis process. By 1959 the largest brackish desalination plant in the world had been built and commissioned. South Africans were thus in the forefront of this technology, even to the extent of making the required membranes locally.Our historical review of membrane development and the applications of membrane technology in Southern Africa encompasses both pressure- and voltage-driven processes. Examples of the pressure processes are microfiltration, ultrafiltration and charged membrane ultrafiltration or nanofiltration, and finally reverse osmosis with fixed and dynamically formed membranes. The voltage-drive processes considered are electrodialysis and electrodialysis reversal. |
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0273-1223 |
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Brief Historical Review of Membrane-development and Membrane Applications in Waste-water Treatment in Southern Africa; Isi:A1992kc89700002; AMD ISI | Wolkersdorfer |
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CBU @ c.wolke @ 17314 |
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441 |
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