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Separation of Co from Ni and Li from chloride media using polymer inclusion membrane system with thiosalicylate based ionic liquid

Pospiech Beata

Physicochemical Problems of Mineral Processing

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2022

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Vol. 58, iss. 6

art. no. 152997

EN

The selective removal of cobalt(II) from aqueous chloride solutions containing nickel(II) and lithium(I) was studied. The facilitated transport of metal ions through polymer inclusion membranes (PIMs) with trihexyl(tetradecyl)phosphonium thiosalicylate [PR4][TS] under various conditions was analyzed. In order to optimize the separation process, several factors such as the ion carrier concentration in the membrane as well as of the effect of the concentration of the acids in the source/receiving phases were investigated. The results show that PIM containing 25% CTA as the polymer support, 40% NPOE as the plasticizer and 35% [PR4][TS] allow the selective recovery of more than 90% of cobalt(II) from 6 mol/dm3 hydrochloric acid into 0.5 mol/dm3 sulfuric acid.

2

Application of Plasticized Cellulose Triacetate Membranes for Recovery and Separation of Cerium(III) and Lanthanum(III)

Pospiech Beata, Makowka Adam

Autex Research Journal

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2022

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Vol. 22, no. 3

312--317

EN

This work explains the application of plasticized cellulose triacetate (CTA) membranes with Cyanex 272 di(2,4,4-(trimethylpentyl)phosphinic acid) and Cyanex 301 (di(2,4,4-trimethylpentyl)dithiophosphinic acid) as the ion carriers of lanthanum(III) and cerium(III). CTA is used as a support for the preparation of polymer inclusion membrane (PIM). This membrane separates the aqueous source phase containing metal ions and the receiving phase. 1M H2SO4 is applied as the receiving phase in this process. The separation properties of the plasticized membranes with Cyanex 272 and Cyanex 301 are compared. The results show that the transport of cerium(III) through PIM with Cyanex 272 is more efficient and selective than lanthanum(III).

3

Application of oxalic acid as an efficient leaching agent of aluminum from industrial waste

Pospiech Beata, Warzecha Marek

Physicochemical Problems of Mineral Processing

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2020

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Vol. 56, iss. 2

264--270

EN

The leaching with acids is one of many methods used for recovery of valuable components from industrial wastes. The processing and neutralization of this type of waste is very difficult due to toxic properties. This work shows the results of aluminum leaching from industrial black dross with oxalic acid depending on temperature, acid concentration, effect of liquid to solid ratio (L/S) and time process. The oxalic acid has not been used so far for processing of aluminum black dross. The main purpose of this work was to determine the optimal conditions of this process. The results show that the maximum leaching efficiency of aluminum (75.2 %) was obtained with a liquid to solid ratio of 20:1 using 0.5 mol·dm-3 oxalic acid at 75 °C for 3 h.

4

Synthesis of Polymer Inclusion Membranes based on Cellulose Triacetate for Recovery of Lanthanum(III) from Aqueous Solutions

Makowka Adam, Pospiech Beata

Autex Research Journal

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2019

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Vol. 19, no. 3

288--292

EN

Polymer inclusion membrane (PIM) containing cellulose triacetate (CTA) as a polymer matrix and 2-nitrophenyl octyl ether (NPOE) as a plasticizer was developed. This membrane also contained di(2-ethylhexyl)phosphoric acid (D2EHPA) and tributyl phosphate (TBP) as the carriers of metal ions. The facilitated transport of lanthanum(III) from aqueous nitrate(V) solutions across PIM was studied. It was observed that metal ions were transported from the source phase into 2M H2SO4 as the receiving phase. The transport through PIM with D2EHPA as the ion carrier was found as the more effective method of lanthanum(III) removal from the aqueous solution than transport through PIM with TBP as the ion carrier.