Carlson, L., & Kumpulainen, S. (2001). Retention of harmful elements by ochreous precipitates of iron. Tutkimusraportti Geologian Tutkimuskeskus, -(154), 30–33.
Abstract: The capability of soil fines to fix harmful elements, e.g. heavy metals and arsenic, depends on specific surface area and other characteristics, such as surface charge. In the pH-range typical of natural waters (pH 5,5-7,5), the surfaces of fine-grained silicate particles and manganese oxides are negatively charged; consequently cations, such as heavy metals, fix effectively to them. The iron oxide surfaces are usually positively charged and typically fix anions, such as sulphate and arsenate. Retention of anions is especially extensive to precipitates formed from acid mine drainage (pH 2,5-5,0). For example, precipitates found at Paroistenjarvi mine, Finland, contain more than 70 g/kg of arsenic (dry matter). Adsorbed anions, e.g. sulphate, enhance the capacity of precipitate to fix heavy metal cations in low-pH environments.
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Chalaturnyk, R. J., Scott, J. D., & Ozum, B. (2002). Management of Oil Sands Tailings. Pet. Sci. Technol., 20(9-10), 1025–1046.
Abstract: In Alberta, oil sands bitumen is utilized for synthetic crude oil (SCO) production by surface mining, bitumen extraction followed by primary (coking) and secondary (catalytic hydro-treating) upgrading processes. SCO is further refined in specially designed or slightly modified conventional refineries into transportation fuels. Oil sands tailings, composed of water, sands, silt, clay and residual bitumen, is produced as a byproduct of the bitumen extraction process. The tailings have poor consolidation and Water release characteristics. For twenty years, significant research has been performed to improve the consolidation and water release characteristics of the tailings. Several processes were developed for the management of oil sands tailings, resulting in different recovered water characteristics, consolidation rates and consolidated solid characteristics. These processes may affect the performance of the overall plant operations. Apex Engineering Inc. (AEI) has been developing a process for, thesame purpose. In this process oil sands tailings are treated with Ca(OH)(2) lime and CO2 and thickened using a suitable thickener. The combination of chemical treatment and the use of a thickener results in the release of process water in short retention times without accumulation of any ions in the recovered water. This makes it possible to recycle the recovered water, probably after a chemical treatment, as warm as possible, which improves the thermal efficiency of the extraction process. The AEI Process can be applied in many different fashions for the management of different fractions of the tailings effluent, depending on the overall plant operating priorities.
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Cheng, S. - Y. (1976). Reclamation of acid mine water by coupled ion exchange-reverse osmosis. Ph.D. thesis, West Virginia University,, .
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Chironis, N. P. (1987). Mine-built ponds economically clear acid mine waters. Coal Age, (1), 58–61.
Abstract: Bestimmte Wasserpflanzen in Teichen können Metalle aus sauren Grubenwässern binden durch Adsorption, Filtration und Einlagerung in Wurzeln und Blättern. Algen und oxydierende Bakterien unterstützen diesen Reinigungsprozeß. Angaben zur Anlage der Teiche: Durchflußkapazität 20 l/min bis 38 l/min, Spülung von 18 m(exp 2) pro 4 l Durchflußmenge, Wasserhöhe 5 cm bis 10 cm, der pH-Wert des austretenden Wassers ist größer als 4,0.
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Chua, A. S. M., Takabatake, H., Satoh, H., & Mino, T. (2003). Production of polyhydroxyalkanoates (PHA) by activated sludge treating municipal wastewater: effect of pH, sludge retention time (SRT), and acetate concentration in influent. Water Res, 37(15), 3602–3611.
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