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AMBIENTUM BIOETHICA BIOLOGIA CHEMIA DIGITALIA DRAMATICA EDUCATIO ARTIS GYMNAST. ENGINEERING EPHEMERIDES EUROPAEA GEOGRAPHIA GEOLOGIA HISTORIA HISTORIA ARTIUM INFORMATICA IURISPRUDENTIA MATHEMATICA MUSICA NEGOTIA OECONOMICA PHILOLOGIA PHILOSOPHIA PHYSICA POLITICA PSYCHOLOGIA-PAEDAGOGIA SOCIOLOGIA THEOLOGIA CATHOLICA THEOLOGIA CATHOLICA LATIN THEOLOGIA GR.-CATH. VARAD THEOLOGIA ORTHODOXA THEOLOGIA REF. TRANSYLVAN
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The STUDIA UNIVERSITATIS BABEŞ-BOLYAI issue article summary The summary of the selected article appears at the bottom of the page. In order to get back to the contents of the issue this article belongs to you have to access the link from the title. In order to see all the articles of the archive which have as author/co-author one of the authors mentioned below, you have to access the link from the author's name. |
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STUDIA CHEMIA - Issue no. 4(II) / 2009 | |||||||
Article: |
USE AQUEOUS PEG-INORGANIC SALT TWO-PHASE SYSTEMS FOR Bi(III) EXTRACTION IN THE PRESENCE OF INORGANIC EXTRACTANTS. Authors: DUMITRU BULGARIU, LAURA BULGARIU. |
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Abstract: The Bi(III) extraction behaviour was studied in aqueous polyethylene glycol (PEG) – (NH4)2SO4 two-phase system, using inorganic anions (I-, Br-, Cl- and SCN-), as extractants. The aqueous two-phase systems were prepared using aqueous solutions of phase-forming components (PEG and (NH4)2SO4) in water or in 1N H2SO4. The experimental results show that more adequate for Bi(III) extraction is the aqueous two-phase systems, where the aqueous solutions of phase-forming components are prepared in 1N H2SO4. Under these conditions, the addition of inorganic extractants determined the partitioning of Bi(III) into PEG-rich phase, easy observable at extractants concentration higher than 0.06 mol/dm3. The efficiency of extractants follows the order: I- >> Br- > Cl- >> SCN-. Using the Bi(III) distribution coefficients calculated as a function of inorganic extractants concentration, the extracted species were assumed. Keywords: aqueous PEG-based two-phase system, Bi(III) extraction, inorganic extractants |
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