SZIDONIA-KATALIN TANCZOS, ALEXANDRA RALUCA MIRON, ANDREEA DINU,  ANDREEA RADUCU, ALINA CRISTEA, AURELIA CRISTINA NECHIFOR<br>Emulsion Membranes Iodine Separation<br>Iodine Separation with Emulsion Membranes Based on Cyclohexanol II

SZIDONIA-KATALIN TANCZOS, ALEXANDRA RALUCA MIRON, ANDREEA DINU, ANDREEA RADUCU, ALINA CRISTEA, AURELIA CRISTINA NECHIFOR
Emulsion Membranes Iodine Separation
Iodine Separation with Emulsion Membranes Based on Cyclohexanol II

Abstract:

Among non-metals, iodine, as molecular iodine but also as iodide anion, is of particular importance for regenerative separations, justified by the technological importance, but especially by the biological importance, including the nuclear accidents (radioactive aerosol generation). In this paper is presented the regenerative separation of iodine from dilute aqueous solutions using emulsion liquid membranes based on cyclohexanol. For the study, a technical variant of emulsified liquid membranes was approached, with a membrane (M) less dense than water, based on cyclohexanol, in which the aqueous and receiving phase were dispersed. Synthetic feed solution (FS) simulates the composition of aerosols generated by: borehole water or seawater and has an iodine content of 20-200ppm. For the amplification of mass transfer through cyclohexanol based membranes the iodide ion conversion to molecular iodine was investigated using two available oxidants: hydrogen peroxide and molecular chlorine.The comparative results of iodine separation from low concentrations solutions (50 ppm iodine ion) by transforming iodide ion into molecular iodine as a result of an oxidation reaction taking place in the source phase, indicates a significant increase of iodine separation with increasing the amount of oxidant dosed in the source phase up to 50-60 ppm, followed by a slow, but significant decrease. Keywords: iodine separation, emulsion membranes, hydrogen peroxide, molecular chlorine, oxidant

Issue: 2014, Volume 65, Issue 7

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