会议论文集名称：
Natural Resources and Sustainable Development II. Part 1
关键词：
Ecological security;Sustainable development;Uranium mining industry
摘要：
Ecological security is an important issue for sustainable development of mining industry. Uranium mining industry is the base for development of nuclear industry and nuclear power. But uranium mining and processing has larger effect on ecological environment which mainly include tailings, waste rock, waste water, and radiation effects. This paper probes into the role that ecological safety plays in the sustainable development of uranium mining based on analysis of restricting factors on uranium mining in China from the perspective of ecological security. The uranium mining industry in China to achieve sustainable development, we must establish ecological security ideas.
作者机构：
[Xie Yanshi; Tan Kaixuan; Chen Liang] Univ South China, Sch Nucl Resource & Nucl Fuel Engn, Hengyang 421001, Hunan, Peoples R China.;[Tu Cairong] Univ South China, Design & Arts Coll, Hengyang 421001, Hunan, Peoples R China.
通讯机构：
[Xie Yanshi] U;Univ South China, Sch Nucl Resource & Nucl Fuel Engn, Hengyang 421001, Hunan, Peoples R China.
会议名称：
International Conference on Chemical Engineering and Advanced Materials
会议时间：
MAY 28-30, 2011
会议地点：
Changsha, PEOPLES R CHINA
会议主办单位：
[Xie Yanshi;Tan Kaixuan;Chen Liang] Univ South China, Sch Nucl Resource & Nucl Fuel Engn, Hengyang 421001, Hunan, Peoples R China.^[Tu Cairong] Univ South China, Design & Arts Coll, Hengyang 421001, Hunan, Peoples R China.
会议论文集名称：
Advanced Materials Research
关键词：
Modified DLA model;Minerals;Fractal growth
摘要：
A modified fractal growth model of minerals was considered in the square lattice 300 × 300. One seed is placed at the center of the square lattice as a growth focus and the attraction domain is set to diamond. Three main parameters are considered in this model which probability of the surface adhesion is Pg with the range of 0 to 99% to eliminate the noise impact and adsorption distance d varies from 0 to 9 units on behalf of the gravitational field strength between particles and fill gaps s varied from 0.00 to 5.00 units distance to perform the influence of environmental temperature on the minerals growth system. Three model sets are carried out with two fixed parameters and the other changed parameter. The results show the fractal dimension of DLA group increase with the decrease of Pg and the increases of d and s, as well as the structure of minerals from disseminated, star or radial gradual transition to agglomerate. The model is a two-dimensional simulation for three-dimensional fractal growth and can not fully reflect the complex growth dynamics of mineral aggregate in three-dimensional confined space.
作者机构：
[王晓; 郑伟娜] School of Chemistry and Chemical Engineering, University of South China, Hengyang 421001, China;[谭凯旋; 夏良树] School of Nuclear Resources and Nuclear Fuel Engineering, University of South China, Hengyang 421001, China
通讯机构：
School of Nuclear Resources and Nuclear Fuel Engineering, University of South China, China
会议名称：
International Mining Forum 2010(2010年国际采矿论坛 IMF 2010)
会议时间：
2010-09-20
会议地点：
合肥
会议主办单位：
[Zeng Sheng;Tan Kai-xuan;Qu Hui-qiong] Univ S China, Sch Nucl Resources & Nucl Fuel Engn, Hengyang 421001, Peoples R China.
会议论文集名称：
International Mining Forum 2010(2010年国际采矿论坛 IMF 2010)论文集
关键词：
in situ leaching uranium;green mining of ore deposits;structure of ore rock;fractal feature
摘要：
The in situ leaching uranium is environmentally friendly mining technique that contains mining, mineral processing and metallurgical technology, in which the leaching solution is directly injected into underground ore bed and the useful metal or compound is obtained through reaction between solutions and minerals. The ore-bearing strata pore structure feature and ore rock particle distribution directly affect the leaching rate of useful components. In order to study the ore-bearing strata ore rock structure feature and its effect on in situ leaching uranium, based on analysis of mercury penetration test data of a certain uranium deposit with rock samples, several relative parameters are determined including porous radius size and distribution, porosity distribution. Using fractal theory, porous structure characteristics and variation of this ore-bearing and strata was analyzed, fractal characteristics of porous structure was discussed, and pore structure characteristics of this ore-bearing strata was further studied with scanning electron microscope. The results show that fractal characteristics of porous structure is regional, the fractal dimension can quantitatively describe heterogeneity of pore structure, the more the fractal dimension, the stronger the heterogeneity of porosity distribution, the more complicated the pore structure, and the less the porosity of ore rock. This is harmful for uranium leaching.
作者机构：
[王晓; 郑伟娜] School of Chemistry and Chemical Engineering, University of South China, Hengyang, Hunan 421001, China;[夏良树; 谭凯旋] School of Nuclear Resources and Nuclear Fuel Engineering, University of South China, Hengyang, Hunan 421001, China
通讯机构：
[Xia, L.-S.] S;School of Nuclear Resources and Nuclear Fuel Engineering, University of South China, China
摘要：
The geological and hydrogeological conditions of some sandstone uranium deposit in Xinjiang are extremely complex, which exhibits especially in the high carbonate content of ore and the high salt concentration of groundwater. Two blocks in the deposit were selected for acidic in-situ leaching test and alkaline in-situ leaching test differently. On acidic in-situ leaching test field, a group of leaching well was constructed as a triangle pattern (four-spot well), 5-33g/L H(2)SO(4) and 5g/L H(2)O(2) was selected as lixiviant. The test results show that the uranium concentration in pregnant solution is lower, and a serious chemical precipitation and blocking occur in the ore-bearing layer, which cause a significant decreasing of pumping and injection rate. On alkaline in-situ leaching test field, a group of leaching well with a square pattern(five-spot well) was constructed, 0.54g/L H(2)O(2) solutions were injected at early stage and 550-600mg/L NH(4)HCO(3) solutions were injected at last stage. The test results show the maximum of the uranium content in pregnant solution reach 53.7ing/L, and the pumping and injection rate do not decrease significantly. So the alkaline in-situ leaching mining can be adopted in this deposit.
期刊：
2009 3RD INTERNATIONAL CONFERENCE ON BIOINFORMATICS AND BIOMEDICAL ENGINEERING, VOLS 1-11,2009年:4699-4703
通讯作者：
Tan, Kaixuan
作者机构：
[Zeng, Sheng; Tan, Kaixuan] Univ S China, Sch Nucl Resources & Safety Engn, Hengyang, Peoples R China.;[Yi, Zhengji] Hengyang Normal Univ, Dept Chem, Hengyang, Peoples R China.
通讯机构：
[Tan, Kaixuan] U;Univ S China, Sch Nucl Resources & Safety Engn, Hengyang, Peoples R China.
会议名称：
iCBBE 2009
会议时间：
2009-01-01
会议地点：
Beijing, China
会议论文集名称：
The 3rd International Conference on Bioinformatics and Biomedical Engineering (iCBBE 2009). [v.8]
关键词：
Sulfate reducing bacteria;Zero-valent iron;Treatment of uranium-bearing wastewater;Column experiment
摘要：
The treatment of uranium-bearing wastewater from uranium mine and using microorganism to treating wastewater is paid much attention to environmental researchers. Based on column experiments, the paper investigated the potential using sulfate reducing bacteria (SRB) and zero-valent iron (ZVI) to synergetic treat contamination in wastewater such as sulfate, uranium, etc. The results show that SRB+ZVI can effectively remove contamination U(VI) and SO4~(2-) in wastewater, the removal rate is 99.4% and 86.2% for U(VI) and (SO_4)~(2-) respectively, the pH value of wastewater can be basified to neutral. U(VI) and (SO_4)~(2-) as electron acceptor of sulfate reducing bacteria are removed by biological reduction. The corrosion of ZVI is benefit to enhance the pH value of wastewater and form anaerobic reducing environment, strengthen survival and metabolism reaction of SRB, and play a synergetic enhancement.
