|
| Experimental Study on Adsorption of Uranium by Surrounding Rock of Sandstone Uranium Deposit under Neutral Conditions |
|
Received:April 29, 2019
Revised:April 30, 2019
Accepted:May 05, 2019
Published Online:July 15, 2019
|
| View Full Text View/Add Comment Download reader |
| DOI：doi：10.3969/j.issn.1007-7545.2019.08.013 |
| KeyWord:in-situ leaching uranium; surrounding rock; adsorption property; particle size; ratio of liquid to solid |
| Author | Institution |
| LI Heng |
东华理工大学 核资源与环境国家重点实验室 |
| ZHOU Yi-peng |
东华理工大学 核资源与环境国家重点实验室 |
| ZHOU Wei-yu |
东华理工大学 核资源与环境国家重点实验室 |
| WEN Xu-xiang |
东华理工大学 核资源与环境国家重点实验室 |
|
| Hits: 1740 |
| Download times: 1800 |
| Abstract: |
| In water-rock system of in-situ leaching of sandstone-type uranium deposit, adsorption of dissolved uranium at solid-liquid interface has effect on uranium migration. In order to investigate adsorption characteristics of dissolved uranium by ore-bearing layer sandstone medium under CO2+O2 neutral leaching condition, adsorption tests with different particle size media and different ratio of solid to liquid (L/S) were conducted in laboratory with uranium bearing leaching solution and surrounding rock of uranium deposit in Mengqiguer, Xinjiang. The results show that equilibrium concentration of adsorbed uranium on different sizes of rocks is between 11.62~20.28 mg/g. Both equilibrium adsorbed concentration and adsorption rate of uranium inversely correlate with particle size. Equilibrium adsorbed concentration of uranium under different L/S condition is between 10.07~18.23 mg/g, and equilibrium adsorbed concentration of uranium positively correlate with L/S, but adsorption rate of uranium negatively correlate with L/S. Adsorption kinetic characteristics of uranium by rocks is consistent with intragranular diffusion mode. The results can provide a basis for determination of adsorption model and calibration of parameters in simulation process of in-situ leaching uranium solute transport. |
| Close |