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- Title
EFFICIENCY OF NONIONIC TENSIDES AS TRANSPORT AGENTS FOR METAL CATIONS.
- Authors
Suljkanović, M.; Nurković, E.; Nikolić, Ž.
- Abstract
In this paper, interactions between cations and non-ionic tensides were investigated. Spectrometric measurements on model-systems (cation+counter ion+tenside) were applied. Interactions were explained based on the position and intensity of absorption maxima. Investigated model-systems were also applied in liquid membrane preparation. Nonionic tensides dissolved in nonpolar organic solvents were tested as possible carriers in liquid membranes for metal cation transport. The effect of their application reflects in decreasing the level of cation transport, caused by strong metal-tenside interactions within the membrane. Nonionic tensides: TX-100, TX-45, Brij 35, Brij 58 and Brij 78 were used in experiments. Interactions with metal cations Pb(II) and Cd(II) and competitive ligands: 18-crown-6 and dibenzo-18-crown-6 dissolved in organic solvents (1,2-dichloroethane, dichloromethane and chloroform) were investigated. The results showed that the strongest interactions occurred between cations and tensides with longer chains, i.e. a higher number of electron-donor centers (TX-100 compared to TX-45). Atomic absorption spectrometry was applied for metal cation concentration measurements, after 3 hours of experiment: lower transport efficiency actually proved the efficiency of nonionic tensides as carriers in liquid membranes.
- Publication
Technologica Acta, 2016, Vol 9, Issue 2, p29
- ISSN
1840-0426
- Publication type
Article