European Journal of Chemistry

Simultaneous removal of chromotrope 2B and radionuclides from mixed radioactive process wastewater using organo-bentonite

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Published: Mar 28, 2011
DOI: https://doi.org/10.5155/eurjchem.2.1.83-93.191
Keywords:
CTAB-bentonite, Chromotrope 2B, Radionuclides, Adsorption, Radioactive wastewater, Wastewater treatment
Section
Research Article
Issue
Vol. 2 No. 1 (2011): March 2011
Dates
Received 2010-06-30
Accepted 2010-09-29
Published 2011-03-28


Main Article Content

Kamal Shakir
Nuclear Chemistry Department, Hot Laboratories Center, Atomic Energy Authority, Cairo, Nasr City, EG-13759, Egypt
Hussein Fouad Ghoneimy
Nuclear Chemistry Department, Hot Laboratories Center, Atomic Energy Authority, Cairo, Nasr City, EG-13759, Egypt
Ibtisam Tadros Hennawy
Organo-metallic and Organo-metalloid Chemistry Department, National Research Center, Cairo, Dokki, EG-12622, Egypt
Ahmed Faouzy Elkafrawy
Department of Chemistry, Faculty of Science, Ain Shams University, Cairo, Abbassia, EG-11655, Egypt
Shokry Gad Elrab Beheir
Nuclear Chemistry Department, Hot Laboratories Center, Atomic Energy Authority, Cairo, Nasr City, EG-13759, Egypt
Mamdoh Refaat
Nuclear Chemistry Department, Hot Laboratories Center, Atomic Energy Authority, Cairo, Nasr City, EG-13759, Egypt

Abstract

The simultaneous removal of cationic radionuclides, 137Cs(I), 60Co(II) and 152+154Eu(III), and a chemically toxic anionic pollutant, the analytical reagent chromotrope 2B (C2B), from simulated mixed radioactive process wastewater (MRPWW) has been investigated using bentonite modified with cetyltrimethylammonium bromide. Modification was confirmed by elemental analysis, X-ray diffraction and infrared spectroscopy. Bentonite partially modified to 78% of the cation exchange capacity (PMB) was found capable to adsorb adequately both C2B and the radionuclides from aqueous solutions. Detailed batch kinetics and isotherm studies for removal of C2B singly and the radionuclides simultaneously were performed. The C2B and radionuclides kinetics conform to pseudo-first-order rate equation and the adsorption isotherms are treated with Freundlich and Langmuir models. Thermodynamic parameters were evaluated. Results suggest physisorption and ion-exchange as the principal uptake mechanism for C2B and the radionuclides, respectively. High simultaneous removal was obtained for C2B (≈ 100%) and each of the test radionuclides (>99%) from the simulated MRPWW.

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Shakir, K.; Ghoneimy, H. F.; Hennawy, I. T.; Elkafrawy, A. F.; Beheir, S. G. E.; Refaat, M. Simultaneous Removal of Chromotrope 2B and Radionuclides from Mixed Radioactive Process Wastewater Using Organo-Bentonite. Eur. J. Chem. 2011, 2, 83-93.

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