Abstract Jarosites are known to be potential compounds for the Fe(III), SO4 2− and impurities control in hydrometallurgical processes. Due to inherent association of Na, K, Fe, Al with the oxidic and sulphidic ores, these metal ions dissolve during sulphuric acid leaching and subsequently reprecipitate as varieties of ferric hydroxysulphates. The formation of jarosites is favoured in the temperature range of 80- 100°C and pH < 2.5. The presence of mono- and tri-valent cations and suitable counter anions such as sulphate, arsenate, phosphate, silicates etc. stabilise these compounds even at very high acid concentration and temperature >200°C. In this paper, various aspects related to jarosites are briefly reviewed emphasising mineralogy, structure, precipitation, formation at elevated temperatures, stability and utilization.

Ferric ion

10.1080/08827509608914135

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Sorption behavior of Pb(II) and Cd(II) on iron ore slime and characterization of metal ion loaded sorbent

Journal of Hazardous Materials (2008)

Mamata Mohapatra K. Rout B. K. MOHAPATRA S. Anand

10.1016/j.jhazmat.2008.12.081

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Citations (76)

Studies on sorption of some geomaterials for fluoride removal from aqueous solutions

Journal of Hazardous Materials (2008)

M.G. Sujana Harapriya Pradhan S. Anand

Chromite

Fugacity

10.1016/j.jhazmat.2008.03.062

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Citations (145)

Kinetics of Ammonia Leaching of Multimetal Sulphides

Mineral Processing and Extractive Metallurgy Review (1992)

K. SARVESWARA RAO S. Anand R.P. Das H. S. Ray

This paper briefly describes the studies carried out on oxidative ammonia leaching of Cu-Zn-Pb multimetal sulphides. Kinetics of zinc and copper dissolution were studied with − 200 + 300 mesh BSS fraction and 1% solids in the slurry. It is observed that the dissolution of sphalerite proceeds by a phase boundary reaction model and that of copper via diffusion through product layer in the temperature range of 70-100°C. The rate equations for zinc and copper dissolution are given by: 1 − (1 − α)1/3 = k Zn[NH3][pO2]1/2 1 − 2/3α − (1 2/3α )2/3 = kCu[NH3]2[pO2]1/2 where the symbols have the usual meanings. Activation energies for zinc and copper dissolution reactions are estimated to be 66.5 and 55.4 kJ/mole, respectively. Activation energy values thus obtained are also comparable to those obtained using a differential approach. The leaching results obtained with 10% solids using a wide range of particle size (− 140 + 500 mesh) indicate that copper dissolution is chemically controlled in ammonia as well as ammonia-ammonium sulphate medium in the temperature range of 115-135°C. However, at lower temperature (˜55°C). the leaching reaction follows a diffusion model. Zinc dissolution data show deviations from the shrinking core model due to high extractions in the initial stages.

Hydrometallurgy

Selective leaching

10.1080/08827509208914072

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Separation of entrained fine titania particles from iron chloride solution

International Journal of Mineral Processing (1995)

I.N. Bhattacharya S. Anand

Separation (statistics)

10.1016/0301-7516(94)00039-3

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