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Effect of various environmental factors on the adsorption of U(VI) onto biochar derived from rice straw |
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| Authors: | Dong Lijia Yang Jianxia Mou Yinyan Sheng Guodong Wang Linxia Linghu Wensheng Asiri Abdullah M Alamry Khalid A |
| Institution: | 1.School of Life Sciences, Shaoxing University, Huancheng West Road 508, Shaoxing, 312000, Zhejiang, People’s Republic of China ;2.State Key Laboratory of Vegetation and Environmental Change, Institute of Botany, Chinese Academy of Sciences, Beijing, 100093, China ;3.School of Chemistry and Chemical Engineering, Shaoxing University, Huancheng West Road 508, Shaoxing, 312000, Zhejiang, People’s Republic of China ;4.Chemistry Department, Faculty of Science, King Abdulaziz University, Jeddah, 21589, Saudi Arabia ; |
| Abstract: | Herein, we used biochar pyrolyzed from rice straw to adsorb uranium (U) from aqueous solutions. The adsorption of U(VI) on biochar was strongly dependent on pH but independent on ionic strength. HA/FA enhanced the sorption at pH <6.8 while inhibited the sorption at pH >6.8. The sorption reached equilibrium within 3 h, which was not mediated by pH. The adsorption process was spontaneous and endothermic, and enhanced at higher temperature. However, the influence of temperature was negligible at low initial U(VI) concentrations. Therefore, biochar derived from rice straw may be a promising adsorbent for the removal of U(VI). |
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