Selective removal of arsenic(V) from a molybdate plant liquor by precipitation of magnesium arsenate

Y.Y. Park; T. Tran; Y.H. Lee; Y.I. Nam; G. Senanayake; M.J. Kim

doi:10.1016/j.hydromet.2010.07.002

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Selective removal of arsenic(V) from a molybdate plant liquor by precipitation of magnesium arsenate

Journal article

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Selective removal of arsenic(V) from a molybdate plant liquor by precipitation of magnesium arsenate

Y.Y. Park, T. Tran, Y.H. Lee, Y.I. Nam, G. Senanayake and M.J. Kim

Hydrometallurgy, Vol.104(2), pp.290-297

2010

DOI: https://doi.org/10.1016/j.hydromet.2010.07.002

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Abstract

Precipitation of Mg-3(AsO4)(2) for the removal of arsenic (As) from a molybdenum oxide processing plant liquor containing 70.9 g/L Mo(VI) and 469 mg/L As(V) was performed. The Stabcal software was used to model the speciation and solubility equilibria, and to identify the pH conditions at which optimum precipitation can be carried out. The optimum pH range for As(V) removal is between pH 7.5 and 10.2. This avoids the need to adjust the liquor pH to affect the precipitation. By adding magnesium chloride or sulphate at a Mg:As molar ratio of at least 2:1, As(V) could be removed to less than 5 mg/L at pH 10.2 resulting in a pure Mo(VI) liquor from which a high purity product of 99.9% MoO3 could be produced by acidification.

Details

Title: Selective removal of arsenic(V) from a molybdate plant liquor by precipitation of magnesium arsenate
Authors/Creators: Y.Y. Park (Author/Creator)
T. Tran (Author/Creator)
Y.H. Lee (Author/Creator)
Y.I. Nam (Author/Creator)
G. Senanayake (Author/Creator)
M.J. Kim (Author/Creator)
Publication Details: Hydrometallurgy, Vol.104(2), pp.290-297
Publisher: Elsevier BV
Identifiers: 991005543836307891
Copyright: (C) 2010 Elsevier B.V
Murdoch Affiliation: School of Chemical and Mathematical Science; Parker Cooperative Research Centre for Integrated Hydrometallurgy Solutions
Language: English
Resource Type: Journal article

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Collaboration types: Domestic collaboration; International collaboration
Citation topics: 3 Agriculture, Environment & Ecology; 3.91 Contamination & Phytoremediation; 3.91.660 Arsenic Biogeochemistry
Web Of Science research areas: Metallurgy & Metallurgical Engineering
ESI research areas: Materials Science