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RARE METALS, SEMICONDUCTORS
ArticleName Adsorption recovery of vanadium from sulphate solutions with complex composition
DOI 10.17580/tsm.2017.01.07
ArticleAuthor Moskalyuk E. V., Blokhin A. A., Murashkin Yu. V., Mikhaylenko M. A.
ArticleAuthorData

Saint Petersburg State Technological Institute (Technical University), Saint Petersburg, Russia:

E. V. Moskalyuk, Student of a Chair “Technology of Rare Elements and Nanomaterials on their Basis”
A. A. Blokhin, Professor of a Chair “Technology of Rare Elements and Nanomaterials on their Basis”, e-mail: blokhin@list.ru
Yu. V. Murashkin, Assistant Professor of a Chair “Technology of Rare Elements and Nanomaterials on their Basis”

 

Representation of Purolite Ltd in CIS, Moscow, Russia:
M. A. Mikhaylenko, Head of Hydrometallurgy Line

Abstract

We investigated the sorption of vanadium (V) and vanadium (IV) from 0,4 M solution of sodium sulfate at different pH values. The following anion exchange resins were used in the work: strong base anion exchange resins Purolite A500/2788 and Purolite PFA600/4740, weak base anion exchange resins Purolite A111 with tertiary, Purolite S984 with secondary and primary amino groups and Purolite S108 with the N-glutamine groups. All the tested anion exchange resins showed ability to uptake vanadium (V); and dependence of loading rate on the pH of solutions had a dome shape. The maximum loading of vanadium (V) was achieved at pH = 3.0–3.5. The sorption behavior of vanadium (IV) in regards of pH variation was similar to the behavior of vanadium (V). The main differences between vanadium (V) and vanadium (IV) at sorption on anion exchange resins consisted in the fact that vanadium (IV) was absorbed in a more narrow range of pH solutions and less completely than vanadium (V). We proposed the preoxidation of vanadium (IV) to vanadium (V) before its sorption from real solutions. Isotherms of sorption of vanadium (V) on A500 and A111 resins were investigated. Both anion exchangers have similar vanadium capacities. Iron (III) (in the range of its concentrations) from 1 to 5 g/L has no significant effects on the anion exchange sorption of vanadium (V). Vanadium (V) can be effectively eluted from the weak base A111 resin by solutions of sodium or ammonia hydroxide, but elution of vanadium from strong base A500 resin requires application of alkaline solutions of salts, such as sodium or ammonia chloride, or nitrate. Vanadium capacity of the A111 resin in dynamic experiment reaches 121.7 g/L of swollen resin at sorption from the modeling solution comprising of 0.3 mol/L Na2SO4, 1.6 g/L vanadium (V), 2.2 g/L iron (III), 2.1 g/L aluminum, having pH = 2.0. At least 99% of vanadium can be stripped from the loaded resin by aqueous ammonia.

keywords Recovery, adsorption, stripping, anion exchange resins, functional groups, vanadium (V), vanadium (IV)
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