摘要：
Anthraquinone-2-sulfonate (AQS) was employed in humus substitutes to evaluate the effects and influencing factors of U(VI) reduction-by Shewanella oneidensis MR-1 (S. oneidensis MR-1) under anaerobic-condition. The removal rate of U(VI) at 30 ℃ reaches 99.0% afterd 96 h with the pH value of 7.0 and AQS concentration of 1.0 mmol/L. The effective concentrations of AQS as the accelerator for U(VI) bioreduction are approximately 0.5-1.0 mmol/L. The bioreduction of U(VI) is inhibited when the concentration of AQS exceeds 2.0 mmol/L. The coexistence of ions, such as Cu~(2+), Cr~(6+), Mn~(2+), shows a remarkable negative effect on the U(VI) reduction, and Zn~(2+) shows less influence on the process compared with other tested ions. The U(VI) reduction is remarkably inhibited when the concentration of nitrate ion exceeds 1.0-mmol/L. Otherwise, no difference is found when the nitrate ion concentration is less than 0.5 mmol/L. Sulfate ion (<5.0 mmol/L) slightly promotes the U(VI) reduction. Zero-valent iron (ZVI) promotes the U(VI) reduction by S. oneidensis, and the reduction rate improves with increasing the amount of ZVI in the range of 0-2.0 g/L. The XPS result indicates that uranium deposits on the cell surface are in U(VI) and U(IV) forms, and the majority of uranium in the solution is stable UO_2.
作者：
Feng, Z. G.*;Zhang, B.;Duan, X. Z.;Chen, R.;Wang, X. L.;...
期刊：
Journal of Residuals Science & Technology,2015年12(SUPPL-1):S159-S163 ISSN：1544-8053
通讯作者：
Feng, Z. G.
作者机构：
[Ma, Q.; Han, S. L.; Zhang, B.; Duan, X. Z.; Chen, R.; Feng, Z. G.; Wang, X. L.] Univ South China, Sch Nucl Resource Engn, Hengyang 421001, Peoples R China.;[Zhang, B.; Chen, R.; Wang, X. L.] Univ South China, Key Discipline Lab Natl Def Biotechnol Uranium &, Hengyang 421001, Peoples R China.
通讯机构：
[Feng, Z. G.] U;Univ South China, Sch Nucl Resource Engn, Hengyang 421001, Peoples R China.
摘要：
Six uranium tailings samples from the shallow depth of two large-scale uranium tailings ponds in South China, which were affected by pedogenesis, were analyzed to determine the occurrence modes of uranium. The results demonstrated that an average of nearly 80% of the uranium in the samples was mobile and potentially mobile, indicating that this type of uranium tailings could significantly threaten their ambient environment when their contents of uranium were relatively high. In this sense, the possibility of the in-situ immobilization of active uranium in the uranium tailings was discussed. The experimental data indicated that the active uranium could be immobilized through its reaction with phosphate, which was theoretically feasible and promising in curbing uranium pollution.
作者机构：
[谢焱石; 尹建文; 谭凯旋; 唐振平; 段先哲; 胡杨; 王正庆; 李春光; 王昭昭; 冯志刚] School of Nuclear Resources Engineering, Hunan Provincial Cooperative Innovation Center for Nuclear Fuel Cycle Technology and Equipment, University of South China, Hengyang;Hunan;421001, China;[谢焱石; 尹建文; 谭凯旋; 唐振平; 段先哲; 胡杨; 王正庆; 李春光; 王昭昭; 冯志刚] Hunan;[谢焱石; 尹建文; 谭凯旋; 唐振平; 段先哲; 胡杨; 王正庆; 李春光; 王昭昭; 冯志刚] 421001, China
通讯机构：
[Tan, K.] S;School of Nuclear Resources Engineering, Hunan Provincial Cooperative Innovation Center for Nuclear Fuel Cycle Technology and Equipment, University of South China, Hengyang, Hunan, China
作者机构：
[刘明学; 聂小琴; 董发勤] Fundamental Science on Nuclear Wastes and Environmental Safety Laboratory, Southwest of Science and Technology, Mianyang, China;[张东] Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics, Mianyang, China;[Liu, Ning] Key Laboratory of Radiation Physics and Technology, Institute of Nuclear Science and Technology, Sichuan University, Chengdu, China;[丁德馨; 刘宁] Fundamental Science on Biotechnology in Uranium Mining and Hydrometallurgy, University of South China, Hengyang, China
通讯机构：
Fundamental Science on Nuclear Wastes and Environmental Safety Laboratory, Southwest of Science and Technology, Mianyang, China
作者机构：
[刘金香; 王永华; 谢水波; 马华龙; 陈华柏; 李标] Hunan Provincial Key Laboratory of Pollution Control and Resources Reuse Technology, 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
通讯机构：
Hunan Provincial Key Laboratory of Pollution Control and Resources Reuse Technology, University of South China, Hengyang, China
作者机构：
[董发勤; 刘明学; 聂小琴] Fundamental Science on Nuclear Wastes and Environmental Safety Laboratory, Southwest University of Science and Technology, Mianyang, China;[张东] Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics, Mianyang, China;[刘宁] Key Laboratory of Radiation Physics and Technology, Institute of Nuclear Science and Technology, Sichuan University, Chengdu, China;[丁德馨; 李广悦] Fundamental Science on Biotechnology in Uranium Mining and Hydrometallurgy Laboratory, University of South China, Hengyang, China
通讯机构：
Fundamental Science on Nuclear Wastes and Environmental Safety Laboratory, Southwest University of Science and Technology, Mianyang, China
作者机构：
[蒲成志] School of Nuclear Resources Engineering, University of South China, Hengyang, Hunan, 421001, China;[付宗智] Changsha Engineering and Research Institute Ltd. of Nonferrous Metallurgy, Changsha, Hunan, 411201, China;[张春阳] School of Resources and Environment Engineering, Wuhan University of Technology, Wuhan, Hubei, 430070, China;[蒲成志; 付宗智; 张春阳; 曹平] School of Resources and Safety Engineering, Central South University, Changsha, Hunan, 410083, China
通讯机构：
[Ding, De-xin] U;Univ South China, Key Discipline Lab Natl Def Biotechnol Uranium Mi, 28 West Changsheng Rd, Hengyang 421001, Hunan, Peoples R China.
关键词：
In situ leaching;Groundwater;Bioreduction;U(VI);Anaerobic zone
摘要：
To determine whether the U(VI) in groundwater under anoxic conditions at a decommissioned in situ leaching (ISL) uranium mine could be bioreduced, groundwater samples containing suspended sediments were taken from the mine, experimental setup was fabricated, and the jar containing the groundwater in the setup was amended with ethanol and incubated under anoxic conditions. The variations of pH, chemical oxygen demand, nitrate, sulfate, U(VI), and dissolved oxygen (DO) concentrations were monitored during the incubation. U(VI) concentration dropped to 0.043 mg/L when the stimulated microorganisms were active, and it then increased to 0.835 mg/L within 10 days after the metabolism of the stimulated microorganisms was inhibited. The DO variation was observed in the amended jar during the incubation, and the metabolism of the stimulated microorganisms was found to affect the DO concentration. Firmicutes were found to be dominant in the sediments in the amended jar through the 16S rRNA pyrosequencing. The results indicate that it is possible to bioreduce U(VI) in the groundwater under anoxic conditions at the decommissioned ISL uranium mine by adding carbon source into it without removing the oxygen from it.
作者机构：
[马华龙; 唐振平; 陈胜; Zeng, Tao-Tao; 谢水波; 凌辉; 王劲松] Hunan Provincial Key Laboratory of Pollution Control and Resources Technology, 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
作者机构：
[李峰; 陈伟; 丁德馨] School of Nuclear Resource Engineering, University of South China, Hengyang, China;[李峰; 陈伟; 胡南; 丁德馨] Key Discipline Laboratory for National Defence for Biotechnology in Uranium Mining and Hydrometallurgy, University of South China, Hengyang, China
通讯机构：
School of Nuclear Resource Engineering, University of South China, Hengyang, China
关键词：
含金硫精矿;金;微波焙烧;预处理;浸出率;表面形貌
摘要：
对难浸含金硫精矿进行微波焙烧,考察微波功率、矿量（即样品质量）和焙烧时间对样品质量损失率和浸出率的影响。结果表明:当微波功率为16 k W、焙烧时间为50 min、矿量为900 g时,样品质量损失率可达28.12%,浸出率可达71.56%,较原矿直接碘化浸出率（9.82%）有了大幅提高。利用XRD和SEM技术分析焙烧前后样品的成分和表面形貌,微波焙烧后的样品较原矿更为松散、多孔,更利于浸出。
作者机构：
[潘伟] Key Laboratory of Mine Thermo-motive Disaster and Prevention, Ministry of Education, Liaoning Technical University, Fuxin, China;[杨月平] School of Nuclear Resources Engineering, University of South China, Hengyang, China;[潘伟; 李孜军; 吴超] School of Resources and Safety Engineering, Central South University, Changsha, China
通讯机构：
Key Laboratory of Mine Thermo-motive Disaster and Prevention, Ministry of Education, Liaoning Technical University, Fuxin, China
摘要：
In order to reveal the nonlinear dynamics characteristics of unsteady self-heating process of sulfide ores, nine different kinds of sulfide ore samples from a pyrite mine in China were taken as experimental materials and their self-heating characteristics were measured in laboratory. Furthermore, the measured temperature was studied by integrating wavelet transform, nonlinear characteristic parameters extraction and fuzzy comprehensive evaluation. The results indicate that only the ore samples 1, 2, 6 and 9 have obvious self-heating phenomenon, and their self-heating initiative temperatures are 220 ℃, 239 ℃, 220 ℃ and 220 ℃,respectively, which means that they are difficult to produce self-heating under normal mining conditions. The correlation dimension of self-heating process is fraction and the maximum Lyapunov exponent is positive, which means that it is feasible to study the self-heating process based on chaotic dynamics theory. The nonlinearities of self-heating process of these four samples (ore samples 1, 2, 6 and 9) are 0.8227, 0.7521, 0.9401 and 0.8827 respectively and the order of the samples according to these results is: sample 6,sample 9, sample 1, sample 2, which is consistent with the measured results of self-heating characteristics. Therefore, the nonlinearity method can be used to evaluate the self-heating tendency of sulfide ores, and it is an effective verification of the reliability of measured results.
期刊：
Journal of Engineering and Technological Sciences,2015年47(6):623-632 ISSN：2337-5779
通讯作者：
Sun, Bing(sunbingzs@126.com)
作者机构：
[Ma, Aiyang; Zeng, Sheng; Zhang, Jing] School of Nuclear Resources Engineering, University of South China, NO28, West Changsheng Road, Hengyang, China;[Sun, Bing] Institute of Urban Construction, University of South China, Hengyang, China
通讯机构：
Institute of Urban Construction, University of South China, Hengyang, China
作者机构：
[戴剑勇; 孟令聪] School of Engineering of Nuclear Resources, University of South China, Hengyang;Hunan;421001, China;[邹树梁] Key Laboratory of Emergency Safety Technology and Equipment of Nuclear Facilities in Hunan Province, Hengyang;[戴剑勇; 孟令聪; 邹树梁] Hunan
作者机构：
[叶勇军; 赵娅利; 谢东; 李向阳; 钟永明; 王立恒] School of Environment Protection and Safety Engineering, University of South China, Hengyang, China;[叶勇军; 丁德馨] 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; 王立恒; 曹雅琴; 赵娅利; 范楠彬] School of Environmental Protection and Safety Engineering, University of South China, Hengyang, China;[丁德馨] 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：
[杜雪明; Zeng, Sheng; 谭凯旋] School of Nuclear Resources Engineering, University of South China, Hengyang, China;[孙冰] School of Urban Construction, University of South China, Hengyang, China
通讯机构：
School of Urban Construction, University of South China, Hengyang, China
作者机构：
[马华龙; 吴宇琦; 陈胜; 唐振平; Zeng, Tao-Tao; 谢水波; 凌辉] Hunan Provincial Key Laboratory of Pollution Control and Resources Technology, University of South China, Hengyang, China;[谢水波] Key Discipline Laboratory of National Defence for Biotechnology in Uranium Mining and Hydrometallurgy, University of South China, Hengyang, China
通讯机构：
Hunan Provincial Key Laboratory of Pollution Control and Resources Technology, University of South China, Hengyang, China
