Abstract
Several non-ferrous metal ores and concentrates contain significant amounts of arsenic that upon mobilization during hydrometallurgical processing necessitates its effective removal and disposal in environmentally stable tailings. The most common method to accomplish this operation involves lime neutralization in the presence of excess iron. It is known that for its effective co-precipitation, arsenic must be in its pentavalent state and iron as ferric at a molar ratio Fe(III)/As(V)>3. Upon selection of the right pH profile the precipitates produced in this way are stable under oxic conditions. This may be not true however under sub-oxic or anoxic conditions that might develop in tailings ponds. In this context the potential stabilizing role of other co-ions becomes important. As such, this paper investigates the removal and redox stability of arsenic with ferric and various co-ions, Fe(II), Al(III), Ni(II), in a 2-stage continuous co-precipitation process.
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Literature
E. Krause, V.A. Ettel, “Solubilities and Stabilities of Ferric Arsenate Compounds,” Hydrometallurgy, 22 (1989), 311–337.
Y. Jia, G.P. Demopoulos, “Coprecipitation of arsenate with iron(III) in aqueous sulfate media: effect of time, lime as base and co-ions on arsenic retention,” Water Research 42 (2008), 661–668.
D. Langmuir et al., “Predicting arsenic concentrations in the porewaters of buried uranium mill tailings,” Geochimica et Cosmochimica Acta, 63 (1999), 3379–3394
N. Chen et al., “Structural characterization of poorly-crystalline scorodite, iron(III)-arsenate co-precipitates and uranium mill neutralized raffinate solids using X-ray absorption fine structure spectroscopy,” Geochimica et Cosmochimica Acta, 73 (2009), 3260–3276.
L.G. Twidwell, R.G. Robins, J.W. Hohn, “The Removal of Arsenic From Aqueous Solution by Coprecipitation with iron(II),” Arsenic Metallurgy: Fundamentals and Applications, ed. R.G. Reddy and V. Ramachandran, (Warrendale, PA, The Minerals, Metals & Materials Society, 2005), 3–24.
R.J. de Klerk et al., “Continuous circuit coprecipitation of arsenic(V) with ferric iron by lime neutralization: Process parameter effects on arsenic removal and precipitate quality,” Hydrometallurgy, 111–112 (2012), 65–72.
D. Langmuir, J. Mahoney, J. Rowson, |Solubility products of amorphous ferric arsenate and crystalline scorodite (FeAs04·2H20) and their application to arsenic behavior in buried mine tailings,” Geochimica et Cosmochimica Acta, 70 (2006), 2942–2956.
R.G. Ford, “Rates of hydrous ferric oxide crystallization and the influence on coprecipitated arsenate,” Environmental Science & Technology, 36 (2002), 2459–63.
G.B. Harris and E. Krause, “The Disposal of Arsenic from Metallurgical Processes: Its Status Regarding Ferric Arsenate”, Extractive Metallurgy of Copper, Nickel and Cobalt, vol. I (Fundamental Aspects), ed. R.G. Reddy and R.N Weizenbach (Warrendale, PA: The Minerals, Metals and Materials Society, 1993), 1221–1237.
G.B. Harris, “The Removal and Stabilization of Arsenic from Aqueous Process Solutions: Past, Present and Future,” Minor Elements 2000, ed. C.A. Young, (Littletown, CO, 2000), 3–20.
A.P.D. Wilmot et al., “Kinetics of Sulfide Oxidation by Dissolved Oxygen,” Water Pollution Control Federation, 60 (1988), 1264–1270.
J.J. Erbs et al. “Reductive dissolution of arsenic-bearing ferrihydrite,” Geochimica et Cosmochimica Acta, 74 (2010), 3382–3395.
E.A. Rochette, G.C. Li, S.E. Fendorf, “Stability of Arsenate Minerals in Soil under Biotically Generated Reducing Conditions,” Soil Science Society of America Journal, 62 (1998), 1530–1537.
R. Daenzer, “Investigating the role of ferrous iron in the arsenic (V) -iron(II, III) coprecipitation process system,” (M.Eng. thesis, McGill University, 2011).
R.J. de Klerk, G. P. Demopoulos, “Continuous Circuit Production and Accelerated Ageing of Iron(III)-Arsenic(V) Coprecipitates — Probing Process-Stability Relationships”, EPD Congress 2008: Proceedings of Sessions and Symposia Sponsored by the Extraction and Processing Division (EPD), ed. S.M. Howard, (Warrendale, PA: The Minerals, Metals and Materials Society, 2008), 3–10
R.J. de Klerk, |Investigating the Continuous Circuit Coprecipitation of Arsenic (V) with Ferric Iron in Sulphate Media,” (M.Eng. thesis, McGill University, 2008).
R. Daenzer, R.J. De Klerk, G.P. Demopoulos, “Arsenic Control in Process Tailings: Continuous Co-Precipitation of As(V) with Iron Sulphate Media”, in Proc. Uranium 2010, Eds. E.K. Lam et. al., (CIM, 2010), Vol. 2, 365–375
N. Chen et al., “XAFS Study of Arsenical Nickel Hydroxide,” (Paper presented at the 15th International Conference on X-ray Absorption Fine Structure, Beijing, China, 22–28 July 2012)
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Doerfelt, C., Demopoulos, G.P. (2013). Continuous Co-Precipitation Behaviour and Stability of Arsenic(V) from Fe(II,III)-Al(III)-Ni(II) Sulphate Effluent Solutions. In: Battle, T., et al. Ni-Co 2013. Springer, Cham. https://doi.org/10.1007/978-3-319-48147-0_30
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DOI: https://doi.org/10.1007/978-3-319-48147-0_30
Publisher Name: Springer, Cham
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