PDF
Full
Outline
For the salicylic acid chelating resin, the specific surface area and pore size were determined using low temperature nitrogen adsorption-desorption method; and its thermodynamic stability was examined. The effects of solution pH and ρ(Cl-) on its uranium adsorption performance were studied, and its adsorption isotherms, adsorption kinetics, and desorption performance were also investigated. The results show that the specific surface area of salicylic acid chelating resin is 32.34 m2/g, and the pore size is 32.08 nm, The salicylic acid chelated resin has good thermal stability when the temperature is below 180 ℃. When the pH is in the range of 7~9, the resin has good adsorption performance, and the uranium adsorption capacity can reach 14.1 mg/g dry resin. The presence of Cl- can reduce the adsorption capacity for uranium. When the ρ(Cl-) is 3.0 g/L, the uranium adsorption capacity decrease by about 9.2%. When the equilibrium ρ(U) in solution is 400 mg/L, the uranium adsorption capacity of the resin reach its maximum, at 153 mg/g dry resin. After 20 h adsorption, the adsorption process reach equilibrium. Both acidic and alkaline desorption agents show good desorption performance for resins, with desorption rates both above 94%. For the real uranium leaching solution with ρ(U) of 21.2 mg/L and ρ(Cl-) of 3.36 g/L, the uranium adsorption capacity of the salicylic acid chelating resin can reach 14.7 mg/g dry resin after 24 h adsorption, indicating good uranium adsorption performance.
PDF
289
128
| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
关闭全屏
No. 86 Xueyuan South Road, Haidian District, Beijing
010-62199257
qkjq@cast.org.cn
Copyright © 2025 China Association for Science and Technology. All rights reserved. For all open access content, the relevant licensing terms apply.
Sponsored by the Office of the Leading Group for Cybersecurity and Informatization of CAST, and supported by Science and Technology Review Publishing House
