Flotation of molybdate oxyanions from dilute solutions Part II. Selective separation from phosphates, arsenates and silicates

 
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Flotation of molybdate oxyanions from dilute solutions Part II. Selective separation from phosphates, arsenates and silicates

Matis, Konstantinos
Zhao, Y.-C.
Zoumpoulis, Anastasios

Adsorbing colloid flotation was found to be an efficient method for selective separation of phosphates or silicates from aqueous solutions of molybdate oxyanions (binary mixtures); tertiary and quaternary mixtures of molybdates and arsenate, phosphate and silicate anions have been also separated effectively. The main parameters affecting this process, namely the concentrations of Fe(III) (used as co-precipitant), dodecylamine (used as surfactant or collector), molybdates, phosphates, arsenates and silicates, the pH of the solutions studied, as well as the addition of foreign ions (Cl− and SO4−) were investigated in detail. It was found that over 95% of the impurities (usually 15 mg/1 each) can be selectively removed from aqueous solutions containing molybdates (at concentrations exceeding 200 mg Mo/1), when the solution pH was around 9 (±0.2), while the simultaneous co-removal (i.e. loss) of molybdates was around 20%, almost regardless of the initial concentrations of the other co-existing components

Article / Άρθρο
info:eu-repo/semantics/article

Separation
Silicate
Arsenate
Molybdate
Phosphate
Oxyanions

Αριστοτέλειο Πανεπιστήμιο Θεσσαλονίκης (EL)
Aristotle University of Thessaloniki (EN)

1996
2009-06-29T17:00:26Z


Αριστοτέλειο Πανεπιστήμιο Θεσσαλονίκης, Σχολή Θετικών Επιστημών, Τμήμα Χημείας

urn:ISSN:0304386X
Hydrometallurgy, vol.43 [1996] p.155-167 [Published Version]

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info:eu-repo/semantics/openAccess



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