Authors:
W. Walkowiak Wroclaw University of Technology Institute of Inorganic Chemistry and Metallurgy of Rare Elements 50-370 Wroclaw Poland

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R. Bartsch Texas Tech University Department of Chemistry and Biochemistry Lubbock TX 79409-1061 USA

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C. Kozlowski Technical University of Czestochowa Department of Chemistry 42-200 Czestochowa Poland

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J. Gega Technical University of Czestochowa Department of Chemistry 42-200 Czestochowa Poland

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W. Charewicz Wroclaw University of Technology Institute of Inorganic Chemistry and Metallurgy of Rare Elements 50-370 Wroclaw Poland

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B. Amiri-Eliasi Texas Tech University Department of Chemistry and Biochemistry Lubbock TX 79409-1061 USA

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Abstract  

Competitive alkali metal cation transport across polymer inclusion membranes (PIMs) containing sym-(alkyl)dibenzo-16-crown-5-oxyacetic acid carriers provides excellent selectivity for Na+ transport with the total fluxes being strongly influenced by the length of the alkyl chain that is attached geminal to the functional side arm in the lariat ether. Removal of chromium(VI) anions by PIMs from acidic aqueous phases was also investigated. Using tri-n-octylamine (TOA) as the ion carrier, Cr(VI) was removed by a PIM to decrease the source phase metal concentration from 1.0 to 0.010 ppm after 30 hours of transport. Competitive transport of Cr(VI) and Cr(III) ions from acidic source phases through PIMs and supported liquid membranes (SLMs) containing TOA and tri-n-octylphosphine oxide (TOPO) as carriers was evaluated and a very high Cr(VI)/Cr(III) separation ratio of 4800 was achieved with a PIM containing TOA. Competitive transport of Zn(II), Cd(II), and Cr(VI) from acidic aqueous solutions through PIMs containing TOA was investigated. The selectivity order for metal ion transport was: HCrO4>CdCl42–+CdCl3>ZnCl42–+ ZnCl3. Non-contact atomic force microscopy was used to obtain images of the pores in cellulose triacetate membranes containing a plasticizer.

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Journal of Radionalytical and Nuclear Chemistry
Language English
Size A4
Year of
Foundation
1968
Volumes
per Year
1
Issues
per Year
12
Founder Akadémiai Kiadó
Founder's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher Akadémiai Kiadó
Springer Nature Switzerland AG
Publisher's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible
Publisher
Chief Executive Officer, Akadémiai Kiadó
ISSN 0236-5731 (Print)
ISSN 1588-2780 (Online)