作者机构：
[Xie, Shuibo; Gao, Xiang; Zeng, Taotao; Wang, Guohua; Zhang, Shiqi] Univ South China, Hunan Prov Key Lab Pollut Control & Resources Reu, Hengyang, Peoples R China.;[Zeng, Taotao; Lens, Piet N. L.] UNESCO, IHE Inst Water Educ, Delft, Netherlands.;[Xie, Shuibo] Univ South China, Key Discipline Lab Natl Def Biotechnol Uranium Mi, Hengyang, Peoples R China.
通讯机构：
[Zeng, Taotao] U;Univ South China, Hunan Prov Key Lab Pollut Control & Resources Reu, Hengyang, Peoples R China.;UNESCO, IHE Inst Water Educ, Delft, Netherlands.
关键词：
Uranium;Anaerobic granular sludge;Bacterial community composition;High-throughput sequencing
作者机构：
[郭韵恬] School of Urban and Environmental, Hunan University of Technology, Zhuzhou;412007, China;[王汉青] School of Civil Engineering, University of South China, Hengyang;421000, China;[郭韵恬] 412007, China
通讯机构：
[Wang, H.] S;School of Civil Engineering, University of South China, Hengyang, China
摘要：
To improve the oxidation rate of high-sulfur and high-arsenic refractory gold concentrate (HGC), a two-stage chemical-biological oxidation approach, which contained a high-temperature chemical oxidation stage (ferric leaching stage) and a subsequent biological oxidation stage with mesophiles, was used in this experiment. The surface analysis of pure arsenopyrite using scanning electron microscope (SEM), Energy Dispersive X-ray Spectroscopy (EDX) and X-ray photoelectron spectroscopy (XPS) indicated that the surface lattice structure was partly disrupted after chemical oxidation; as a result, the subsequent biological oxidation rate during the second stage improved significantly. The extraction levels of Fe, As and S were 49.8%, 50.4% and 51.0%, respectively, in the normal biological oxidation system, while the values increased to 63.3%, 64.2% and 63.3%, respectively, following the two-stage process. Accordingly, the recovery rate of gold increased by 16.8% using the two-stage process compared to that of the one-stage biological oxidation approach.
期刊：
GREEN BUILDING, ENVIRONMENT, ENERGY AND CIVIL ENGINEERING,2017年:159-162
通讯作者：
Sun, Bing
作者机构：
[Zhang, Song-qiu-yang; Deng, Xian-shi; Xie, Jie-hui; Sun, Bing] Univ South China, Inst Urban Construct, Hengyang, Peoples R China.
通讯机构：
[Sun, Bing] U;Univ South China, Inst Urban Construct, Hengyang, Peoples R China.
会议名称：
5th International Conference on Green Building, Materials and Civil Engineering (GBMCE)
会议时间：
APR 17-18, 2016
会议地点：
Hong Kong, PEOPLES R CHINA
会议主办单位：
[Sun, Bing;Deng, Xian-shi;Xie, Jie-hui;Zhang, Song-qiu-yang] Univ South China, Inst Urban Construct, Hengyang, Peoples R China.
关键词：
rock mechanics;jointed rock mass;cyclic shock;damage law
摘要：
In order to study the accumulative damage laws on the jointed rock mass under the impact of cyclic and dynamic loading, one to three specimens, including layered and jointed rock mass, were precast separately, which are made of cement-mortar used as similar material. Ultrasonic wave velocity of each specimen could be measured every time by conducting shock loading one to five times separately. On the basis of ultrasonic wave velocity, the damage variable of the specimen is defined. Meanwhile, both the effect of shock damage degree on rock mass under the shock frequency and sets of joint could be obtained. The results show that under the same shock energy, the damage degree is closely related to sets of joint and shock frequency. In addition, when the shock frequency was small, the specimen only produced microcracks and gradually formed macro-destruction with the increase of accumulative shock frequency.
期刊：
IOP Conference Series: Earth and Environmental Science,2017年64(1) ISSN：1755-1307
通讯作者：
Zhou, Shukui
作者机构：
[Chang, Zhe; Zhou, Shukui] Univ South China, Sch Civil Engn, Hengyang, Peoples R China.
通讯机构：
[Zhou, Shukui] U;Univ South China, Sch Civil Engn, Hengyang, Peoples R China.
会议名称：
International Symposium on Resource Exploration and Environmental Science (REES)
会议时间：
APR 14-16, 2017
会议地点：
Ordos, PEOPLES R CHINA
会议主办单位：
[Chang, Zhe;Zhou, Shukui] Univ South China, Sch Civil Engn, Hengyang, Peoples R China.
会议论文集名称：
IOP Conference Series-Earth and Environmental Science
摘要：
The uranium tailings in southern China was used as the object of study to study the fixation and migration characteristics of nuclide U in shallow tailings. The results showed that the precipitation of tailings in the tailings soil was not linearly related to the depth during the acid rain leaching process. Tailings soil in the role of fixatives, when the lime as a fixative, the tailings of different soil uranium in 20 days after the re-precipitation. However, when lime and ammonium phosphate were used as fixing agents, the cumulative precipitation of U had a significant effect, and the migration of uranium was inhibited.
