|
|||||
|
|
Validation of a Monte Carlo HPGe detector model against irradiated foil gamma-ray spectroscopy measurements |
|
| Authors: | Goodell John J Egnatuk Christine M Padgett Stephen W Bandong Bryan B Roberts Kevin E Mignerey Alice C |
| Institution: | 1.School of Nuclear Science and Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, People’s Republic of China ;2.Guangxi University, 100 Daxue East Road, Nanning, People’s Republic of China ;3.Shanghai Institute of Measurement and Testing Technology, 1500 Zhang Heng Road, Shanghai, 201203, China ; |
| Abstract: | In order to separate and pre-concentrate uranium from aqueous phase, a novel silica-based adsorbent was prepared by impregnating nalidixic acid (HNA) into a macroreticular silica/polymer composite support (SiO2-P) with a mean diameter of 60 μm. Adsorption behavior of uranium from aqueous solution onto the adsorbent was studied. Experimental results indicated that HNA/SiO2-P showed strong adsorption for uranium in a wide range of pH from 3.5 to 10.0, and the maximum adsorption capacity was 35.4 mg g?1. In addition, HNA/SiO2-P exhibited good selectivity for U(VI) and showed weak or bare adsorption affinity to foreign ions. Kinetic and isotherm of uranium adsorption were in accordance with the pseudo-second-order kinetic model and Langmuir isotherm adsorption model, respectively. Moreover, U(VI) sorption was found to be an endothermic reaction and spontaneous under experimental state. The synthesized adsorbent showed an admirable stability at lower pH values in aqueous solution. |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ | |