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Hassan H. S. Imam D. M. Kenawy S. H. El-Bassyouni G. T. Hamzawy E. M. A. 《Journal of Radioanalytical and Nuclear Chemistry》2019,321(2):403-404
Journal of Radioanalytical and Nuclear Chemistry - In the original publication of the article, Figs. 8, 9 and 10 were published incorrectly as linear regression. 相似文献
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Hassan H. S. Imam D. M. Kenawy S. H. El-Bassyouni G. T. Hamzawy E. M. A. 《Journal of Radioanalytical and Nuclear Chemistry》2019,321(2):391-401
The sorption process of Co(II) onto nanoparticles of calcium silicate doped with 5% CuO treated by humic acid was evaluated using batch technique. This process follows the second order kinetic model. Equilibrium isotherm models of Co(II) sorption onto the modified composite was 208.91 mg/g. Negative value of free energy change (ΔG0), confirms the spontaneous sorption of Co(II) ions onto the modified composite. The removal efficiency (R%) reached 96.9% using 0.5 g of the modified composite. Therefore, the composite could be used for treatment of radioactive waste containing 60Co.
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Gehan T. El-Bassyouni Osiris W. Guirguis Wafa I. Abdel-Fattah 《Current Applied Physics》2013,13(5):864-874
Strong and weak acids were chosen for the bone decalcification process. Demineralization of dog cranial bone was carried out using 0.6 M concentration of either of hydrochloric, lactic or citric acid. Consequent morphologic changes were correlated with the developed chemistry, porosity and structure through XRD and FT-IR of the matrices. The dielectric permittivity, loss angle, relaxation dielectric loss as well as a.c. electrical conductivity as functions of frequency and temperature were measured. Zeta potential was evaluated at physiologic pH and temperature and correlated with the developed structures.The results prove lower dielectric properties of demineralized matrices compared to control and exhibited high dissipation of electric energy with more than one relaxation mechanism. This variation proves that the spectral behavior depended on the nature of the bone matrix which resulted from the phase compositions of bone and its crystallite size. The behavior of the obtained results is attributed to the differences of the demineralizing acids and their consequent actions on the matrices, i.e., the differences in the materials. 相似文献
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