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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.

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Extraction of zinc(II) from contaminated its sulphate and chloride solutions

Gotfryd L., Szymanowski J.

Polish Journal of Chemical Technology

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2004

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Vol. 6, nr 2

14-18

EN

A full sequence of investigations was performed with a purpose to develop adequate extraction technologies for the purification of a few typical industrial, both sulphate and chloride, heavily contaminated zinc(II) solutions. These covered: i) independent measurements of individual cation extraction versus pH and extraction isotherms with commercially available extractants, ii) the design of individual extraction systems for the chosen extractants, iii) the counter-current batch-wise full process imitations in a laboratory glass with the use of di(2-ethylhexyl)phosphoric acid (DEHPA) and di(2,4,4-trimethylpentyl)phosphinic acid (Cyanex 272), iv) pilot trial with the use of DEHPA, executed on train of mixer-settler type extractors, working continuously.

3

Recovery of zinc(II) from acidic sulfate solutions. Simulation of counter-current extraction-stripping process

Gotfryd L., Szymanowski J.

Physicochemical Problems of Mineral Processing

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2004

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Vol. 38

113-120

EN

Cyanex 272 and di(2-ethylhexyl)phosphoric acid (DEHPA) were used for extraction of zinc(II) from sulphate solutions. Counter-current extraction-stripping process was simulated. The simulation enabled CYANEX 272 to be selected for the recovery of zinc(II) from acidic sulphate solutions. A higher selectivity of zinc(II) extraction was the main benefit of using CYANEX 272. Technologically significant conclusions could be arrived at only when process solutions with metal contaminants were used for the studies and several extraction-washing-stripping cycles were carried out. The studies of individual extraction and/or stripping using model solutions could be only considered as an initial step and were of a limited technological value.

PL

Cyanex 272 oraz kwas di(2-etyloheksylo)fosforowy (DEHPA) zastosowano do ekstrakcji cynku(II) z procesowych roztworów siarczanowych zawierających dodatkowo Cu(II), Cd(II), Na(I), K(I), Mg(II), Ca(II) i As(V). Symulowano przeciwprądowy proces ekstrakcyjno-reekstrakcyjny. Symulacja pozwoliła wytypować Cyanex 272 jako odpowiedni ekstrahent do selektywnej ekstrakcji cynku(II) wobec występujących zanieczyszczeń. Tylko zastosowanie prawdziwych roztworów technologicznych i prowadzenie pełnego cyklu ekstrakcji - przemywania i reekstrakcji umożliwia wyprowadzenie technologicznie rozsądnych wniosków. Badanie indywidualnego etapu ekstrakcji lub reekstrakcji posiada ograniczone technologiczne znaczenie.