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Abstract Four soil samples were collected from EI-Dabaa site and denoted as ONS/ A, DNS/C, ONS/QHM and ONS/QHMA. They were characterized using X-Ray Fluorescence (XRF) analyses, Fourier transform infrared spectroscopy (FT -IR) analysis, X-Ray diffractometer (XRD) analysis and scanning electron microscope. Results clarify that samples are crystalline in nature. The soil samples were successfully applied as solid phases for retention of 134CS, 60CO and 152+154Eu radionuclides from their aqueous solutions. The effect .L of different parameters (e.g. pH, contact time, solid to liquid ratio, initial metal ion concentration and temperature) on sorption behavior was studied. Effect of competitive univalent (Na +), bivalent (Ca2+), (Mg2+), (Mn2+) and trivalent (AI3+) cations on retention of the soil samples for 134CS, 60CO and 152+154Eu radionuclides was studied. Maximum sorption capacity (Qmax, mg/g) was in the order of 152+154E 60C 134C O•f’l’. kineti d I I• d u > 0 > s. I rerent metre mo e s were app le to assess the sorption of 134CS, 60CO and 152+154Eu ions from their aqueous solutions by soil samples. Pseudo-first order and pseudo- second were used to clarify the suitable sorption pathway. The sorption process followed pseudo-second order kinetics confirmed that chemisorption could be regarded as controlling step. Desorption study was applied for soil samples using different eluents include NaOH, H20, HCI, FeCb, EDTA and HN03. Diffusion study was applied using film diffusion model and intra-particle diffusion model that shows sorption behavior was related by two straight lines this will illustrates that two steps influence the sorption process .. Sorption study has been illustrated in terms of both Freundlich and Langmuir xxiii |