作者机构：
[Xia, Yiqun; Zheng, Weina; Li, Reirei; Xia, Liangshu] Univ South China, Sch Nucl Sci & Technol, Hengyang 421001, Peoples R China.;[Xia, Yiqun] China Inst Atom Energy, Dept Radiochem, POB 275-26, Beijing 102413, Peoples R China.;[Tans, Kaixuan] Univ South China, Sch Nucl Resource & Nucl Fuel Engn, Hengyang 421001, Peoples R China.
通讯机构：
[Xia, Liangshu] U;Univ South China, Sch Nucl Sci & Technol, Hengyang 421001, Peoples R China.
摘要：
Basic aspects of uranium adsorption by rice husk have been investigated. The influences of various experimental parameters such as pH, time, adsorbent dosage, rice husk size, temperature and various concentrations of uranium on uptake were evaluated. The thermodynamics and kinetics of adsorption were analyzed by FT-IR and SEM. The adsorption capacity for uranium on rice husk increased upon increasing initial concentration of uranium and temperature, while decreased with the increase of the amount of rice husk. Maximum uranium adsorption was observed at pH = 3 and particle size between 120 μm and 150 μm. Adsorption equilibrium was achieved within 60 min. At 25 °C, the saturated adsorption capacity qmax was up to 15.14 mg/g when the initial concentration of uranium ranged from 10 to 400 mg/dm3. The adsorption of uranium followed Langmuir adsorption isotherm and according to quasi-second order kinetic equation. The calculated values of δHo, δS0, and δGo indicated that the biosorption process was endothermic and spontaneous. Based on FT-IR spectra it may be concluded that hydroxyl, carbonyl, P-O and Si=O groups are the main active sites.
作者机构：
[李广悦; 刘玉龙; 丁德馨; 王有团; 胡南] Key Discipline Laboratory for National Defence for Biotechnology in Uranium Mining and Hydrometallurgy, University of South China, Hengyang, 421001, China;[马亮; 刘玉龙] CGNPC Uranium Resources Co., Ltd., Beijing, 100029, China
通讯机构：
Key Discipline Laboratory for National Defence for Biotechnology in Uranium Mining and Hydrometallurgy, University of South China, Hengyang, China
作者机构：
[王李管; 朱忠华; 涂小腾; 毕林] School of Resources and Safety Engineering, Central South University, Changsha, 410083, China;[朱忠华] Nuclear Resources Engineering College, University of South China, Hengyang, 421001, China
通讯机构：
[Zhu, Z.-H.] S;School of Resources and Safety Engineering, Central South University, Changsha, China
作者机构：
[王清良; 李乾; 胡鄂明; 李中; 冯志刚] School of Nuclear Resource Engineering, University of South China, Hengyang, China;[成泉辉] No. 6 Smelting Plant, Hunan Shuikoushan Nonferrous Metals Group Co., Ltd., Hengyang, China
作者机构：
[黄振江; 肖佳辉; 付志国; 孙冰; 梁展平] School of Civil Engineering, University of South China, Hengyang, 421001, China;[Zeng, Sheng] Nuclear Resources Engineering College, University of South China, Hengyang, 421001, China
通讯机构：
Nuclear Resources Engineering College, University of South China, Hengyang, China
作者机构：
[Zeng, Tao-Tao] Postdoctoral Research Centre of Mining Engineering, University of South China, Hengyang, China;[谢水波] Key Discipline Laboratory for National Defence for Biotechnology in Uranium Mining and Hydrometallurgy, University of south China, Hengyang, China;[马华龙; 刘迎九; 谢水波; 鲁慧珍; Zeng, Tao-Tao; 荣丽杉; 刘金香] Hunan Province Key Laboratory of Pollution Control and Resources Reuse Technology, University of South China, Hengyang, China
通讯机构：
Hunan Province Key Laboratory of Pollution Control and Resources Reuse Technology, University of South China, Hengyang, China
通讯机构：
Key Discipline Laboratory for National Defense for Biotechnology in Uranium Mining and Hydrometallurgy, University of South China, Hengyang, China
作者机构：
[谢水波; 刘迎九; 荣丽杉; 杨金辉; 杨瑞丽; 唐海琼] Hunan Provincial Key Laboratory of Pollution Control and Resources Technology, University of South China, Hengyang, 421001, China;[谢水波] Key Discipline Laboratory for National Defence for Biotechnology in Uranium Mining and Hydrometallurgy, University of South China, Hengyang, 421001, China
通讯机构：
Hunan Provincial Key Laboratory of Pollution Control and Resources Technology, University of South China, Hengyang, China
作者机构：
[潘伟] Key Laboratory of Mine Thermo-Motive Disaster and Prevention of Ministry of Education, Fuxin, 123000, China;[杨月平] School of Nuclear Resources Engineering, University of South China, Hengyang, 421001, China;[潘伟; 吴超; 李孜军] School of Resources and Safety Engineering, Central South University, Changsha, 410083, China
通讯机构：
School of Resources and Safety Engineering, Central South University, Changsha, China
作者机构：
[杨雨山; 喻清] School of Resources and Safety Engineering, Central South University, Changsha, China;[杨雨山; 丁德馨; 喻清; 胡南] Key Discipline Laboratory for National Defense for Biotechnology in Uranium Mining and Hydrometallurgy, University of South China, Hengyang, China
通讯机构：
Key Discipline Laboratory for National Defense for Biotechnology in Uranium Mining and Hydrometallurgy, University of South China, Hengyang, China
作者机构：
[叶勇军] School of Environment Protection and Safety Engineering, University of South China, Hengyang, 421001, China;[叶勇军; 代鑫涛; 张运峰; 郭倩; 赵娅利; 冯胜洋] Key Discipline Laboratory for National Defence for Biotechnology in Uranium Mining and Hydrometallurgy, University of South China, Hengyang, 421001, China
作者机构：
[唐振平; 谢水波; 史冬峰; 黄华勇; Zeng, Tao-Tao] Hunan Provincial Key Laboratory of Pollution Control and Resources Technology, University of South China, Hengyang, 421001, China;[谢水波] Key Discipline Laboratory for National Defence for Biotechnology in Uranium Mining and Hydrometallurgy, University of South China, Hengyang, 421001, China
通讯机构：
Hunan Provincial Key Laboratory of Pollution Control and Resources Technology, University of South China, Hengyang, China
通讯机构：
[Feng, Zhi-Gang] U;Univ South China, Sch Nucl Resource Engn, Hengyang 421001, Peoples R China.
摘要：
Five soil profiles were sampled around a uranium waste rock dump in South China, which included two unpolluted and three potentially uranium-polluted profiles. Through the comparison of the uranium distribution characteristics and the analysis of the uranium chemical forms of these profiles, the following conclusions can be drawn: (1) significant uranium pollution to the surrounding soils was caused by the dump, and the average uranium in these soils, such as the profiles WP1, WP2 and WP3, was 633.6, 9 and 2.7 times more enriched than the background value; (2) the exotic uranium, which was preferentially aggregated in the upper layer of the soils near the pollution source, would be gradually precipitated in the lower layer of the soils away from the pollution source; (3) the input flux of the exotic uranium of each chemical form would be larger in the soils closer to the pollution source.
作者机构：
[Zeng, Taotao] Postdoctoral Research Centre of Mining Engineering, University of South China, Hengyang, Hunan, 421001, China;[谢水波] Key Discipline Laboratory for National Defence for Biotechnology in Uranium Mining and Hydromentallurgy, University of South China, Hengyang, Hunan, 421001, China;[谢水波; 马华龙; 廖伟; 荣丽杉; 李仕友; 蒋小梅; Zeng, Taotao] Hunan Province Key Laboratory of Pollution Control and Resources Reuse Technology, University of South China, Hengyang, 421001, China
通讯机构：
[Xie, S.] H;Hunan Province Key Laboratory of Pollution Control and Resources Reuse Technology, University of South China, Hengyang, China
