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Capture of volatile iodine by aromatic amines solutions

  • Ourida Ait Ahmed EMAIL logo und Ali Hassoon Al Taiar
Veröffentlicht/Copyright: 14. Mai 2024

Abstract

The presence of an excessive amount of iodine, especially radioactive iodine, is dangerous to the environment. Amine solutions are the most common and technically mature class of chemical sorption used for the capture of the pollutants. The iodine vapor diffusion and release capabilities of the aromatic amine solutions have been investigated. The iodine diffusion and release experiments were examined by UV-visible spectroscopy. Many electronic spectrophotometric studies have been reported in the coordination chemistry field on complexes. Generally, these complexes were obtained by using different electron donors with various organic or metallic electron acceptors in polar and non-polar solvents. The absorption spectra of the donor, acceptors, and the resulted complexes were carried out in methanol in the region of 200–600 nm. The correlation between the spectral characteristics of molecular complexes of iodine with various aromatic amines and the ionization potentials of the donor molecules is discussed. The concentrations of the diffused iodine and the formed complex were calculated using mathematical models and calibration curves. The values of the formation constant (k AD), molar extinction coefficient (ε AD), and absorption band energy of complexes were estimated. The ionization potential of the donor I D was calculated from the complex band energies. The kinetic of the above association and reverse reactions was studied, and some kinetic parameters have been estimated.


Corresponding author: Ourida Ait Ahmed, Chemical Physics Department, Faculty of Chemistry, Université des Sciences et de la Technologie d’Oran – USTOMB, BP 1505 ORAN – El-MNOUER-31035, Bir El Djir, Algérie; and Laboratoire de Chimie des Matériaux Inorganiques et Applications LCMI, Université des Sciences et de la Technologie d’Oran – USTOMB, BP 1505 ORAN – El-MNOUER-31035, Bir El Djir, Algérie, e-mail:

Acknowledgments

This paper is dedicated to the memory of the late Professor Ali Hassoun Al-Taiar.

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Supplementary Material

This article contains supplementary material (https://doi.org/10.1515/pac-2024-0205).


Published Online: 2024-05-14
Published in Print: 2024-11-26

© 2024 IUPAC & De Gruyter

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