当前位置:
X-MOL 学术
›
Phys. Part. Nuclei Lett.
›
论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
The Significance of Mobilization and Immobilization of Specific Radionuclides for Optimum Bioleaching Conditions Using Aspergillus lentulus
Physics of Particles and Nuclei Letters Pub Date : 2020-04-08 , DOI: 10.1134/s1547477120020077 Nareman Harpy , Mohamed A. E. Abdel-Rahman , Abdelsattar M. Sallam , Sameh El Dabour
中文翻译:
动员和固定化特定的放射性核素对于使用小曲霉的最佳生物浸出条件的意义
更新日期:2020-04-08
Physics of Particles and Nuclei Letters Pub Date : 2020-04-08 , DOI: 10.1134/s1547477120020077 Nareman Harpy , Mohamed A. E. Abdel-Rahman , Abdelsattar M. Sallam , Sameh El Dabour
Abstract
Gamma spectrometry is applied for measurement of natural radioactivity by Hyper-pure germanium (HPGe) systems during the application of bioleaching optimum conditions in ore and waste samples. The bioleaching of the ore sample using isolated fungus A. lentulus indicate that the bioleaching efficiency of 234U, 232Th are higher than 238U, 230Th and 235U which may attributed to the effect α-recoil rate for 234U, organic matter, clays or iron oxide and or/lower activity concentration of 232Th. The immobilization of 238U, 235U, 230Th, 214Pb, and 214Bi in ore and waste samples could be result from high organic matter content, iron, and manganese oxides, in addition to the role of microbes that can resist leaching by their cellular compounds. The high mobility of some radionuclides in waste samples may be resulted from the leaching process of the original rocks using acid solution that clean the grain surfaces leaving spaces around the grains and this permit the organic acids to reach the inner parts of the grains during bioleaching processes leading to the high mobility 234U, 232Th and to lesser extent 238U and 235U. The radionuclides 226Ra, 214Pb and 214Bi were found almost totally in the residue of two sample (Q and W) indicating to be associated with radium sulphate or relatively insoluble mineral phases like alumina silicates and refractory oxides.中文翻译:
动员和固定化特定的放射性核素对于使用小曲霉的最佳生物浸出条件的意义