| Records |
| Author |
Totsche, O.; Fyson, A.; Kalin, M.; Steinberg Christian, E.W. |
| Title |
Titration curves: A useful instrument for assessing the buffer systems of acidic mining waters |
Type |
Journal Article |
| Year |
2006 |
Publication |
ESPR Environmental Science and Pollution Research |
Abbreviated Journal |
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| Volume |
13 |
Issue |
4 |
Pages  |
215-224 |
| Keywords |
Abwasseraufbereitung Bergbau Titration Säuregehalt Grundwasser Pufferlösung Neutralisation Titrationskurve Bergbauabwasser |
| Abstract |
The acidification of mine waters is generally caused by metal sulfide oxidation, related to mining activities. These waters are characterized by low pH and high acidity due to strong buffering systems. The standard acidity parameter, the BNC (Base Neutralization Capacity), is determined by endpoint titration, and reflects a cumulative parameter of both hydrogen ions and all buffering systems, but does not give information on the individual buffer systems. It is demonstrated that a detailed interpretation of titration curves can provide information about the strength of the buffering systems. The buffering systems are of importance for environmental studies and treatment of acidic mining waters. Titrations were carried out by means of an automatic titrator using acidic mining waters from Germany and Canada. The curves were interpreted, compared with each other, to endpoint titration results and to elemental concentrations contained therein. The titration curves were highly reproducible, and contained information about the strength of the buffer systems present. Interpretations are given, and the classification and comparison of acidic mining waters, by the nature and strength of their buffering systems derived from titration curves are discussed. The BNC-values calculated from the curves were more precise than the ones determined by the standard endpoint titration method. Due to the complex buffer mechanisms in acidic mining waters, the calculation of major metal concentrations from the shape of the titration curve resulted in estimates, which should not be confused with precise elemental analysis results. Conclusion. Titration curves provide an inexpensive, valuable and versatile tool, by which to obtain sophisticated information of the acidity in acidic water. The information about the strength of the present buffer systems can help to understand and document the complex nature of acidic mining water buffer systems. Finally, the interpretation of titration curves could help to improve treatment measurements and the ecological understanding of these acidic waters. |
| Address |
Leibniz-Institut für Gewässerökologie und Binnenfischerei, Berlin, DE; Boojum Research, Toronto, CA; Humboldt-Universität Berlin, DE |
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0944-1344 |
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| Notes |
Titration curves: A useful instrument for assessing the buffer systems of acidic mining waters; 39481, BERG , 13.11.06; Words: 519; 200610 05282; 10 Seiten, 15 Bilder, 2 Tabellen, 39 Quellen 3UXX *Belastung von Wasser, Wasserreinhaltung, Abwasser* 3BX *chemische Grundlagen* 3IFC *Messung und Prüfung chemischer Größen, chemische Analytik* 3MZ *Bergbau, Tunnelbau, Erdöl /Erdgasförderung, Bohrtechnik*; BERG, Copyright FIZ Technik e.V.; EN Englisch |
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CBU @ c.wolke @ 17580 |
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224 |
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| Author |
Edraki, M. |
| Title |
Post closure management of the Mt Leyshon Gold Mine – Water the integrator |
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Journal Article |
| Year |
2006 |
Publication |
Water in Mining 2006, Proceedings |
Abbreviated Journal |
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Issue |
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Pages |
233-242 |
| Keywords |
mine water treatment |
| Abstract |
Mining at the Mt Leyshon Gold Mine in semi-arid north Queensland stopped in 2002. Newmont Australia has recently initiated a thorough post-closure water management study of the site by revisiting the existing information and conducting new water-related investigations. The focus of this paper. which is the first publication on post-closure environmental management of the site. is an overview of the site water quality in view of the sources and spatial distribution of polluted mine water, and also the performance of cover systems in controlling water flux though mine wastes. |
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Post closure management of the Mt Leyshon Gold Mine – Water the integrator; Isip:000243724400032; Times Cited: 0; ISI Web of Science |
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CBU @ c.wolke @ 16925 |
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150 |
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Simmons, J.A.; Andrew, T.; Arnold, A.; Bee, N.; Bennett, J.; Grundman, M.; Johnson, K.; Shepherd, R. |
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Small-Scale Chemical Changes Caused by In-stream Limestone Sand Additions to Streams |
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Journal Article |
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2006 |
Publication |
Mine Water Env. |
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25 |
Issue |
4 |
Pages |
241-245 |
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acid mine drainage aluminum calcium limestone sand sediment stream liming West Virginia |
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In-stream limestone sand addition (ILSA) has been employed as the final treatment for acid mine drainage discharges at Swamp Run in central West Virginia for six years. To determine the small-scale longitudinal variation in stream water and sediment chemistry and stream biota, we sampled one to three locations upstream of the ILSA site and six locations downstream. Addition of limestone sand significantly increased calcium and aluminum concentrations in sediment and increased the pH, calcium, and total suspended solids of the stream water. Increases in alkalinity were not significant. The number of benthic macroinvertebrate taxa was significantly reduced but there was no effect on periphyton biomass. Dissolved aluminum concentration in stream water was reduced, apparently by precipitation into the stream sediment. |
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1025-9112 |
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Small-Scale Chemical Changes Caused by In-stream Limestone Sand Additions to Streams; 1; FG 4 Abb., 2 Tab.; AMD ISI | Wolkersdorfer |
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CBU @ c.wolke @ 17420 |
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248 |
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Jarvis, A.P. |
| Title |
Effective remediation of grossly polluted acidic, and metal-rich, spoil heap drainage using a novel, low-cost, permeable reactive barrier in Northumberland, UK |
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Journal Article |
| Year |
2006 |
Publication |
Environmental Pollution |
Abbreviated Journal |
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| Volume |
143 |
Issue |
2 |
Pages |
261-268 |
| Keywords |
mine water treatment |
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A permeable reactive barrier (PRB) for remediation of coal spoil heap drainage in Northumberland, UK, is described. The drainage has typical chemical characteristics of pH < 4, [acidity] > 1400 mg/L as CaCO3, [Fe] > 300 mg/L, [Mn] > 165 mg/L, [Al] > 100 mg/L and IS041 > 6500 mg/L. During 2 years of operation the PRB has typically removed 50% of the iron and 40% of the sulphate from this subsurface spoil drainage. Bacterial sulphate reduction appears to be a key process of this remediation. Treatment of the effluent from the PRB results in further attenuation; overall reductions in iron and sulphate concentrations are 95% and 67% respectively, and acidity concentration is reduced by an order of magnitude. The mechanisms of attenuation of these, and other, contaminants in the drainage are discussed. Future research and operational objectives for this novel, low-cost, treatment system are also outlined. (c) 2005 Elsevier Ltd. All rights reserved. |
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Effective remediation of grossly polluted acidic, and metal-rich, spoil heap drainage using a novel, low-cost, permeable reactive barrier in Northumberland, UK; Wos:000238277500010; Times Cited: 0; ISI Web of Science |
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CBU @ c.wolke @ 16928 |
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109 |
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| Author |
Lee, B.H. |
| Title |
Constructed wetlands: Treatment of concentrated storm water runoff (Part A) |
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Journal Article |
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2006 |
Publication |
Environmental Engineering Science |
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23 |
Issue |
2 |
Pages |
320-331 |
| Keywords |
mine water treatment |
| Abstract |
The aim of this research was to assess the treatment efficiencies for gully pot liquor of experimental vertical-flow constructed wetland filters containing Phragmites australis (Cav.) Trin. ex Steud. (common reed) and filter media of different adsorption capacities. Six out of 12 filters received inflow water spiked with metals. For 2 years, hydrated nickel and copper nitrate were added to sieved gully pot liquor to simulate contaminated primary treated storm runoff. For those six constructed wetland filters receiving heavy metals, an obvious breakthrough of dissolved nickel was recorded after road salting during the first winter. However, a breakthrough of nickel was not observed, since the inflow pH was raised to eight after the first year of operation. High pH facilitated the formation of particulate metal compounds such as nickel hydroxide. During the second year, reduction efficiencies of heavy metal, 5-days at 20 degrees C N-Allylthiourea biochemical oxygen demand (BOD) and suspended solids (SS) improved considerably. Concentrations of BOD were frequently < 20 mg/L. However, concentrations for SS were frequently > 30 mg/L. These are the two international thresholds for secondary wastewater treatment. The BOD removal increased over time due to biomass maturation, and the increase of pH. An analysis of the findings with case-based reasoning can be found in the corresponding follow-up paper (Part B). |
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Constructed wetlands: Treatment of concentrated storm water runoff (Part A); Wos:000236600700007; Times Cited: 0; ISI Web of Science |
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CBU @ c.wolke @ 16932 |
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112 |
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