Sodium boro-phosphate glasses containing different amounts of mill scale (65% FeO and 35% Fe2O3) [an iron industry waste formed during the rolling process to produce steel plates] were prepared by the melt quenching technique. The structure and some physical properties of the prepared glasses were investigated using different tools. The amorphous phase of the prepared glass samples was confirmed from their X-ray diffraction. The experimental and empirical densities were found to increase, while the experimental and empirical molar volumes were found to decrease, as mill scale content was increased. By comparing both the experimental and empirical values of density and molar volume, the amorphous nature and short range order character of the studied glasses was confirmed. It was found also that all glass samples behave like semiconductor and both electronic and ionic conductivities were present in these glasses. The correlated barrier hopping model is the appropriate conduction mechanism. The conductivity was found to increase as mill scale content was increased from 10 to 25 mol%, then decreased at sample contains 30 mol% of mill scale, The IR analysis indicated that the iron cations occupy the glass network modifier positions, while the iron cations occupies the glass network former positions only in the sample containing 30 mol% of mill scale. It indicated also that phosphorous cations occupy mainly the tetrahedral coordination state. The volume, mass and molar magnetic susceptibility measurements exhibited gradual increase as mill scale content was increased in the sample composition and all the samples exhibit paramagnetic character. (C) 2020 NIODC. All rights reserved

Surface-protected activated aluminium oxide was synthesized using solution combustion technique and characterized, as inorganic sorbent material, for the removal of Eu152+154 and Cs-134 radionuclides from wastewater. The synthesis aluminium oxide showed construction of protective organic species at the aluminium oxide surface. The structural and thermal analysis investigations of the prepared material revealed presence of oxygen in interstitial position with a stable amorphous phase of aluminium oxide. Different experiments were conducted to investigate the sorption ability of the material to radioactive europium and cesium ions including the effect of pH, initial concentration of radionuclides and temperature. Various kinetic models have been applied and also different isotherm models were studied. The results show that the pseudo-second-order model was applicable for the adsorption process and the monolayer capacity equal 133.16 and 109.78 mg/g for Eu152+154 and Cs-134, respectively. Activated amorphous alumina was found to be cost effective and of high uptake capacity for cesium and europium from aqueous solutions.

The thermoluminescent properties of K-Feldspar from Gattar mountain area at Eastern Desert of Egypt show variation in intensity of characteristic glow curves with respect to exposure dose. The sensitivity of the sample under investigation is very low (with a clear fading portion) compared to that of high sensitivity TL dosimeters. The observed peak in the glow curve corresponds to the summation of five or more overlapping peaks. Such summation behavior of these approximately low temperature peaks increases the fading percentage in shallower traps. However, the fading of peaks in the deep traps indicates the existence of partial electron transfer in these overlapping peaks.

Natural CaF2 shows four main glow peaks. The third one (P-3) at 453K is considered as the dosimetry peak. By deconvolution (CGCD) technique this peak could be analysed into 3 simple overlapping peaks at 440, 455 and 482K. The kinetic parameters of these peaks have been calculated, like its activation energy (E), frequency factor (s), mean life time (tau) and the resonance escape probability (P). The chemical composition of CaF2 has been analysed specially the major elements as well as the trace elements. The photo-transfer phenomenon has been studied in some details. This transfer due to P-3 with UV exposure increase with increasing time till 120 seconds then shows saturation. The rate of photo-transfer is increased by increasing the pre-gamma exposure. From the experimental results and theoretical calculations, it could be evaluated that the first part of P-3 will be decayed after 5.05 years while the last part of the same peak could be disappear after 88.73 years when the irradiated TL material is stored at 25 degrees C.