| Records |
| Author |
Van Hille, R.P.; Boshoff, G.A.; Rose, P.D.; Duncan, J.R. |
| Title |
A continuous process for the biological treatment of heavy metal contaminated acid mine water |
Type |
Journal Article |
Year  |
1999 |
Publication |
Resour. Conserv. Recycl. |
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27 |
Issue |
1-2 |
Pages |
157-167 |
| Keywords |
mine water treatment biological treatment heavy metal acid mine water alkaline precipitation green-algae chlorella |
| Abstract |
Alkaline precipitation of heavy metals from acidic water streams is a popular and long standing treatment process. While this process is efficient it requires the continuous addition of an alkaline material, such as lime. In the long term or when treating large volumes of effluent this process becomes expensive, with costs in the mining sector routinely exceeding millions of rands annually. The process described below utilises alkalinity generated by the alga Spirulina sp., in a continuous system to precipitate heavy metals. The design of the system separates the algal component from the metal containing stream to overcome metal toxicity. The primary treatment process consistently removed over 99% of the iron (98.9 mg/l) and between 80 and 95% of the zinc (7.16 mg/l) and lead (2.35 mg/l) over a 14-day period (20 l effluent treated). In addition the pH of the raw effluent was increased from 1.8 to over 7 in the post-treatment stream. Secondary treatment and polishing steps depend on the nature of the effluent treated. In the case of the high sulphate effluent the treated stream was passed into an anaerobic digester at a rate of 4 l/day. The combination of the primary and secondary treatments effected a removal of over 95% of all metals tested for as well as a 90% reduction in the sulphate load. The running cost of such a process would be low as the salinity and nutrient requirements for the algal culture could be provided by using tannery effluent or a combination of saline water and sewage. This would have the additional benefit of treating either a tannery or sewage effluent as part of an integrated process. |
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0921-3449 |
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Jul; A continuous process for the biological treatment of heavy metal contaminated acid mine water; Isi:000081142100017; file:///C:/Dokumente%20und%20Einstellungen/Stefan/Eigene%20Dateien/Artikel/9937.pdf; AMD ISI | Wolkersdorfer |
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CBU @ c.wolke @ 9937 |
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26 |
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Schwartz, M.O.; Ploethner, D. |
| Title |
From mine water to drinking water; heavy-metal removal by carbonate precipitation in the Grootfontein-Omatako Canal, Namibia |
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Book Chapter |
| Year |
1999 |
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Africa; aluminum; cadmium; canals; carbonates; copper; drinking water; geochemistry; Grootfontein-Omatako Canal; heavy metals; hydrochemistry; iron; lead; manganese; metallogenic provinces; metals; mine drainage; mineral deposits, genesis; mines; Namibia; policy; precipitation; purification; Southern Africa; transport; water management; water treatment 22, Environmental geology |
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Bundesanst. fuer Geowiss. und Rohstoffe |
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Hanover |
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From mine water to drinking water; heavy-metal removal by carbonate precipitation in the Grootfontein-Omatako Canal, Namibia; GeoRef; English; 2002-033925; International congress on Mine, water and environment, Seville, Spain, Sept. 13, 1999 References: 7; 2 tables, sketch maps |
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CBU @ c.wolke @ 5929 |
Serial |
250 |
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Rammlmair, D.; Grissemann, C. |
| Title |
Natural attenuation in slag heaps versus remediation |
Type |
Book Chapter |
| Year |
2000 |
Publication |
Applied mineralogy in research, economy, technology, ecology and culture |
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645-648 |
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acid mine drainage; alteration; concentration; concepts; crust; deposition; design; development; diagenesis; exhalative processes; fines; fluvial features; ground water; leaching; metallurgy; mining; mining geology; mobilization; natural attenuation; physicochemical properties; Plantae; pollution; precipitation; remediation; rivers; slag; time scales; toxic materials; transportation; volatiles; wind transport 22, Environmental geology |
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Rammlmair, D.; Mederer, J.; Oberthuer, T.; Heimann, R.B.; Pentinghaus, H.J. |
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9058091643 |
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Natural attenuation in slag heaps versus remediation; GeoRef; English; 2007-039910; Sixth international congress on Applied mineralogy in research, economy, technology, ecology, and culture, Gottingen, Federal Republic of Germany, July 17-19, 2000 References: 5; illus. |
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CBU @ c.wolke @ 5864 |
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266 |
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Dillard, G. |
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A win-win way to clean up by changing ionic state, new process can precipitate heavy metals |
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Journal Article |
| Year |
2000 |
Publication |
Pay Dirt |
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734 |
Issue |
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Pages |
10-11 |
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acid mine drainage; California; chemical composition; companies; environmental analysis; environmental management; heavy metals; ion exchange; ions; metal ores; metals; mining; pollutants; pollution; precipitation; processes; remediation; soils; surface water; United States; water treatment 22, Environmental geology |
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A win-win way to clean up by changing ionic state, new process can precipitate heavy metals; 2004-029026; illus. United States (USA); GeoRef; English |
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CBU @ c.wolke @ 5822 |
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401 |
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| Author |
Bowell, R.J. |
| Title |
Sulphate and salt minerals; the problem of treating mine waste |
Type |
Journal Article |
| Year |
2000 |
Publication |
Mining Environmental Management |
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8 |
Issue |
3 |
Pages |
11-13 |
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acid mine drainage; acidification; decontamination; discharge; dissolved materials; ecology; effluents; geomembranes; lime; mines; pollution; precipitation; protection; recycling; reverse osmosis; soils; surface water; suspended materials; toxic materials; waste disposal; waste management 22, Environmental geology |
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0969-4218 |
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Sulphate and salt minerals; the problem of treating mine waste; 2000-062783; illus. incl. 4 tables United Kingdom (GBR); GeoRef; English |
Approved |
no |
| Call Number |
CBU @ c.wolke @ 5834 |
Serial |
440 |
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