会议主办单位：
[Huang, Tao;Liu, Longfei;Wu, Shilu] Changshu Inst Technol, Sch Chem & Mat Engn, Changshu 215500, Jiangsu, Peoples R China.^[Zhang, Shuwen] Univ South China, Nucl Resources Engn Coll, Hengyang 421001, Hunan, Peoples R China.^[Huang, Tao] Chongqing Univ, State Key Lab Coal Mine Disaster Dynam & Control, Chongqing 400044, Peoples R China.^[Huang, Tao] Chongqing Univ, Sch Resource & Environm Sci, Chongqing 400044, Peoples R China.
关键词：
Municipal solid waste incineration fly ash;Heavy metals;pH control;Electrokinetic remediation;Enhancement
摘要：
The high leachability of heavy metals and toxic organic components has severely discouraged the broader resource recycling of municipal solid waste incineration fly ashes. In this study, a recycling system combining water washing treatment, cationic buffer solution recovery, and electrokinetic remediation was designed based on pH controls and comprehensively explored in terms of strengthening the removal of heavy metals from samples and reducing the risk of environmental leaching of heavy metals in fly ashes. The water washing pretreatment removed a considerable amount of soluble minerals from the fly ash and lowered the initial pH of the electrochemical system to below 10. The dosing of buffer cations decreased the thickness of the diffuse double layer and ameliorated the mobility of the heavy metal species in the pore fluid. Cu was most sensitive to the changes in the operating factors during electrokinetics. The effects of the remediation times and voltage gradients were more significant on heavy metal removal than those of the nitric acid concentration in the electrokinetic optimization system. The leaching toxicities of zinc, lead, copper, and cadmium were reduced by 82.59%, 73.64%, 67.07%, and 93.13%, respectively. Generally, the recovery of the water washing leachate not only enhanced the performance of the electrokinetic remediation for the municipal solid waste incineration fly ash but also avoided downstream disposal of the effluent.
作者机构：
[Dai, Zhongran; Sun, Yusu; Zhang, Hui; Ding, Dexin; Li, Le] Univ South China, Key Discipline Lab Natl Def Biotechnol Uranium Mi, Hengyang 421001, Peoples R China
通讯机构：
[Ding, Dexin] U;Univ South China, Key Discipline Lab Natl Def Biotechnol Uranium Mi, Hengyang 421001, Peoples R China.
会议名称：
4th North American Symposium on Chemical Reaction Engineering (NASCRE)
会议时间：
MAR, 2019
会议地点：
Houston, TX
摘要：
Efficient removal of U(VT) from mine radioactive wastewater is important for environmental remediation and radiation protection. In this work, a new series of polyamidoxime/polydopamine-decorated graphene oxide (GO/PDA/PAO) composites were obtained by one-pot synthesis and used for the removal of U(VI) from mine radioactive wastewater. The as-synthesized GO/PDA/PAO composites (GO/PDA/PAO-0.2, GO/PDA/PAO-0.5, and GO/PDA/PAO-1) were examined by transmission electron microscopy, Fourier transform infrared (FT-IR), and X-ray photoelectron spectroscopy (XPS). The effects of pH, ionic strength, contact time, initial U(VI) concentration, and temperature on the adsorption behavior of U(VI) by GO/PDA/PAO were investigated. The maximum adsorption capacity of GO/PDA/PAO-0.2 was 502.5 m g/g at pH 6.0 and 298 K. The adsorption kinetics and isotherms can be well illustrated by the pseudo-second-order kinetics model and Langmuir isotherm model. The thermodynamic study indicated that the removal of U(VI) by GO/PDA/PAO-0.2 was an endothermic and spontaneous process. The interactions between GO/PDA/PAO-0.2 and U(VI) were explained based on the FT-IR and XPS analyses. Furthermore, GO/PDA/PAO was applied for U(VI) removal from mine radioactive wastewater. The concentration of U(Vl) in the wastewater can be reduced to 7.28 /mu g/L, which is below the allowable uranium concentration for drinking water stipulated in the standard by the World Health Organization (30 mu g/L).
作者机构：
[Yi, Zheng-ji] Hengyang Normal Univ, Key Lab Funct Organometall Mat, Sch Chem & Mat Sci, Coll Hunan Prov, Hengyang 421008, Peoples R China.;[Tan, Kai-xuan] Univ South China, Sch Nucl Resources & Nucl Fuel Engn, Hengyang 421001, Peoples R China.
会议名称：
2nd International Workshop on Renewable Energy and Development (IWRED)
会议时间：
APR 20-22, 2018
会议地点：
Guilin, PEOPLES R CHINA
会议主办单位：
[Yi, Zheng-ji] Hengyang Normal Univ, Key Lab Funct Organometall Mat, Sch Chem & Mat Sci, Coll Hunan Prov, Hengyang 421008, Peoples R China.^[Tan, Kai-xuan] Univ South China, Sch Nucl Resources & Nucl Fuel Engn, Hengyang 421001, Peoples R China.
会议论文集名称：
IOP Conference Series-Earth and Environmental Science
摘要：
The Xiangxi gold mine was taken as an example to illustrate the application of the finite element and updated Lagrangian approach in the simulation and prediction of the quality of tailings effluents. The numerical modeling results suggest that tailings-water interaction at the early stage leads to the acidification and release of heavy metals which are responsible for the persistent pollution to the environment for 30 years. Tailings pore water can be gradually neutralized and contents of polluted species tend to decline markedly with time. The gangue dissolution and organic matter reaction can stimulate acid neutralization and decrease the diffusion rate of oxygen in tailings impoundments. The contents of pore-water species in upper tailings are significantly higher than in lower part and change severely at 6 m depth. Therefore, the hydrological zoning phenomenon in tailings impoundments accounts for geochemical zonation. This model has the potential to predict drainage quality of sulfide mine tailing impoundments.
摘要：
In order to study the stress distribution and development of the empty pulp defects in anchor bolts, we carried out an experiment on an empty pulp defective bolt. The dynamic testing signals were obtained by non-destructive testing, and test signals under different loads were analyzed. Research shows that in the defective bolt, the strain and load show a linear trend before the empty pulp defect. In the empty pulp defective section, the strain will not have obvious change until the load reaches a certain value. After the empty pulp defect, stress redistribution occurs with the increase of load.
作者机构：
[Ye, Yong-jun; Ding, De-xin] Univ South China, Key Discipline Lab Natl Def Biotechnol Uranium Mi, Hengyang, Hunan, Peoples R China.;[Dai, Xin-tao; Ye, Yong-jun] Univ South China, Sch Environm Protect & Safety Engn, Hengyang, Hunan, Peoples R China.
会议名称：
2nd International Conference on Energy, Environment and Materials Science (EEMS)
会议时间：
JUL 29-31, 2016
会议地点：
Singapore, SINGAPORE
会议主办单位：
[Ye, Yong-jun;Ding, De-xin] Univ South China, Key Discipline Lab Natl Def Biotechnol Uranium Mi, Hengyang, Hunan, Peoples R China.^[Ye, Yong-jun;Dai, Xin-tao] Univ South China, Sch Environm Protect & Safety Engn, Hengyang, Hunan, Peoples R China.
摘要：
In underground uranium mines of China, there are many chamber stopes that can generate and accumulate radon and its daughters, the concentrations of which are about 3-5 times higher than other countries. Therefore, it is very urgent to improve the level of radiation protection of the chamber stopes in China. Ventilation is one of the effective ways to control the concentrations of radon and its daughters. First, this study established the mathematical models that calculated the concentration of radon and its daughters in the chamber stope for designing and optimizing ventilation systems by using the theories of turbulent mass transfer and radioactive decay. Second, the models were used to analyze radon and its daughters' concentrations with the change of airflow rate, air volume, and radon generation rate in chamber stope. Third, the ventilation conditions of chamber stopes of four typical uranium mines in China were investigated and the models to calculate radon and its daughters' concentrations were used to verify its accuracy. Finally, the difference is analyzed between the measured values and the theoretical values of the total Potential Alpha Energy Concentration (PAEC) of radon daughters and a linear correction formula was established.
作者：
Ye, Y. J.*;Liang, T.;Ding, D. X.;Lei, B.;Su, H.;...
期刊：
IOP Conference Series: Earth and Environmental Science,2017年73(1) ISSN：1755-1307
通讯作者：
Ye, Y. J.
作者机构：
[Ye, Y. J.; Ding, D. X.] Univ South China, Key Discipline Lab Natl Def Biotechnol Uranium Mi, Hengyang 421001, Peoples R China.;[Ye, Y. J.; Liang, T.; Zhang, Y. F.; Su, H.; Lei, B.] Univ South China, Sch Environm Protect & Safety Engn, Hengyang 421001, Hunan, Peoples R China.
通讯机构：
[Ye, Y. J.] U;Univ South China, Key Discipline Lab Natl Def Biotechnol Uranium Mi, Hengyang 421001, Peoples R China.;Univ South China, Sch Environm Protect & Safety Engn, Hengyang 421001, Hunan, Peoples R China.
会议名称：
International Conference on Sustainable Energy Engineering (ICSEE)
会议时间：
JUN 12-14, 2017
会议地点：
Perth, AUSTRALIA
会议主办单位：
[Ye, Y. J.;Ding, D. X.] Univ South China, Key Discipline Lab Natl Def Biotechnol Uranium Mi, Hengyang 421001, Peoples R China.^[Ye, Y. J.;Liang, T.;Lei, B.;Su, H.;Zhang, Y. F.] Univ South China, Sch Environm Protect & Safety Engn, Hengyang 421001, Hunan, Peoples R China.
会议论文集名称：
IOP Conference Series-Earth and Environmental Science
摘要：
A calculation model for radon concentration in shrinkage mining stopes under various ventilation conditions was established in this study. The model accounts for the influence of permeability and area of the blasted ore heap, ventilation air quantity, and airflow direction on radon concentration in a confined workspace; these factors work together to allow the engineer to optimize the ventilation design. The feasibility and effectiveness of the model was verified by applying it to mines with elevated radon radiation exposure. The model was found to accurately changes in radon concentration according to the array of influence factors in underground uranium mines.
摘要：
The effects of dosage, initial solution pH, adsorption time, initial U(VI)concentration and other factors on U(VI) removal rate by modified environmental protection activated carbon were studied. When the absorbent is 0.3g/L, the original U(VI) concentration is 10mg/L at pH 6, the equilibrium time of 120 min, The adsorption experimental results show the adsorption capability of modified environmental protection activated carbon is best, the adsorption removal rate reaches 97.61%, the adsorption capacity come to 32.54 mg/g.
作者：
Wang Fu-lin;Wang Zhong-kang;Yang Shi-jiao*;Tang Zi-an;Liu Jie
作者机构：
[Liu Jie; Wang Zhong-kang; Yang Shi-jiao; Wang Fu-lin] Univ South China, Sch Nucl Resources Engn, Hengyang 421001, Peoples R China.;[Tang Zi-an] Yiyang Cent Hosp, Yiyang 413000, Peoples R China.
会议名称：
5th International Conference on Civil Engineering and Transportation (ICCET)
会议时间：
NOV 28-29, 2015
会议地点：
Guangzhou, PEOPLES R CHINA
会议主办单位：
[Wang Fu-lin;Wang Zhong-kang;Yang Shi-jiao;Liu Jie] Univ South China, Sch Nucl Resources Engn, Hengyang 421001, Peoples R China.^[Tang Zi-an] Yiyang Cent Hosp, Yiyang 413000, Peoples R China.
会议论文集名称：
AER-Advances in Engineering Research
关键词：
High sulfur tailings;Blast furnace water quenching slag;Filling;Uniaxial compressive strength
摘要：
In order to solve the problem of low strength and disintegrate easily using ordinary Portland cement-high sulfur tailings filling, we used blast furnace water quenching slag instead of Portland cement which was regarded as cement material to manufacture whole tailings paste for underground filling. We manufactured filling with blast furnace water quenching slag-high sulfur tailings and ordinary Portland cement on the base of analyzing the physicochemical property of whole tailings and blast furnace water quenching slag. Then we manufactured the standard test blocks to cure, and studied the strength of filling with different cement materials in accordance with uniaxial compressive test by the application of the machine of DYE-300 single shaft material test. Compared with cement filling, experimental results show that the strength of blast furnace water quenching slag, early stage or late stage, has a higher strength. And, moreover, it can solve the disintegrating problem caused by ordinary Portland cement-high sulfur tailings filling in the late stage.
作者机构：
[Li, Shi-You; Xiong, Fan; Liu, Ying-Jiu] Univ South China, Hunan Prov High Sch, Key Lab Pollut Control & Utilizat Technol, Hengyang 421001, Hunan, Peoples R China.;[Xie, Shui-Bo] Univ South China, Key Discipline Lab Natl Def Biotechnol Uranium Mi, Hengyang 421001, Peoples R China.
会议名称：
International Conference on Environmental Science and Engineering (ESE)
会议时间：
APR 15-17, 2016
会议地点：
Guilin, PEOPLES R CHINA
会议主办单位：
[Li, Shi-You;Xiong, Fan;Liu, Ying-Jiu] Univ South China, Hunan Prov High Sch, Key Lab Pollut Control & Utilizat Technol, Hengyang 421001, Hunan, Peoples R China.^[Xie, Shui-Bo] Univ South China, Key Discipline Lab Natl Def Biotechnol Uranium Mi, Hengyang 421001, Peoples R China.
关键词：
Anaerobic sludge;Removal;U(VI)
摘要：
The microbial dosage (VSS), pH, U(VI) initial concentration, reuse of anaerobic sludge were studied by batch experiments, the mechanisms for U(VI) removal were discussed. The results show that in the proper pH range (5.2 to 6.6), anaerobic sludge removal efficiency of uranium can keep for a long time. U(VI) removal rate is proportional to the VSS dosage, the initial U(VI) concentration can be a little effect on the removal efficiency of the anaerobic sludge. The most critical influence factor on the removal is pH value. The anaerobic sludge can be reused and the mechanisms for U(VI) removal are redox and adsorption.
作者：
Rong, L. S.*;Yang, R. L.;Dong, C. Q.;Zhao, C.;Yan, Z.;...
作者机构：
[Dong, C. Q.; Xie, S. B.; Zhao, C.; Rong, L. S.; Yang, R. L.] Univ South China, Hunan Prov Key Lab Pollut Control & Resources Tec, Hengyang, Peoples R China.;[Xie, S. B.] Univ South China, Key Discipline Lab Natl Def Biotechnol Uranium Mi, Hengyang, Peoples R China.;[Yan, Z.] Huda Technol & Educ Dev Co Ltd, Changsha, Hunan, Peoples R China.
会议名称：
International Conference on Computer Science and Environmental Engineering (CSEE)
会议时间：
MAY 17-18, 2015
会议地点：
Beijing, PEOPLES R CHINA
会议主办单位：
[Rong, L. S.;Yang, R. L.;Dong, C. Q.;Zhao, C.;Xie, S. B.] Univ South China, Hunan Prov Key Lab Pollut Control & Resources Tec, Hengyang, Peoples R China.^[Xie, S. B.] Univ South China, Key Discipline Lab Natl Def Biotechnol Uranium Mi, Hengyang, Peoples R China.^[Yan, Z.] Huda Technol & Educ Dev Co Ltd, Changsha, Hunan, Peoples R China.
关键词：
uranium;enrichment;plant restoring
摘要：
By using hydroponics experiments,we observed the change of photosynthetic pigments and Malondialdehyde(MDA) content of Eichhornia crassipes,Pistia stratiotes,Vetiveria zizanioides and Acorus calamus L
作者机构：
[Zhang, Qiuyang; Zhang, Haifeng; Sun, Bing] Univ South China, Inst Urban Construct, Hengyang 421001, Peoples R China.;[Zeng, Sheng] Univ South China, Sch Nucl Resources Engn, Hengyang 421001, Peoples R China.
会议名称：
International Conference on Advances in Energy, Environment and Chemical Engineering (AEECE)
会议时间：
SEP 26-27, 2015
会议地点：
Changsha, PEOPLES R CHINA
会议主办单位：
[Sun, Bing;Zhang, Haifeng;Zhang, Qiuyang] Univ South China, Inst Urban Construct, Hengyang 421001, Peoples R China.^[Zeng, Sheng] Univ South China, Sch Nucl Resources Engn, Hengyang 421001, Peoples R China.
会议论文集名称：
AER-Advances in Engineering Research
关键词：
rock mechanics;crossover jointed rock;uniaxial compression;numerical simulation
摘要：
The rock structure is extremely complex, it is difficult to reflect the mechanical properties and the relevant failure mechanisms truly under loads whatever by the theoretical analysis or the laboratory test. In order to analyze the damage characteristics of the crossover jointed rock mass from the microscopic point, the discrete method PFC2D was used to simulate the damage mechanism in the assured jointed rock numerically under Axial compression. The results show that when the angle of the main joint is consistent with the direction of the load, the varying angle between the minor joint and the main joint has rarely influence on the stress-strain curve of the rock mass, the stress when the first fine crack comes up and the peak; when the angle between the minor joint and the main joint is not changing, the peak value gradually reduces as the direction angle between the main joint and the load varying from 0 degrees to 90 degrees; when the peak comes up, the direction angle between the main joint and the load is 45 degrees or 90 degrees, the varying angle between the minor joint and the main joint has rarely influence on the development of the number of new fine cracks, while the angle between the main crack and the load is 0 degrees, the impact on the development of the number of new fine cracks is obvious.
作者机构：
[Zheng Jian; Hu Yang; Wang Xiaoning; Song Jia; Duan Xianzhe; Yang Bifeng; Feng Zhigang] Univ South China, Sch Nucl Resources Engn, Hengyang 421001, Hunan, Peoples R China.;[Hu Yang] Univ South China, Post Doctoral Res Stn Min Engn, Hengyang 421001, Hunan, Peoples R China.;[Hu Yang] Univ South China, Cooperat Innovat Ctr Nucl Fuel Cycle Technol & Eq, Hengyang 421001, Hunan, Peoples R China.
会议名称：
3rd International Conference on Machinery, Materials Science and Energy Engineering (ICMMSEE)
会议时间：
JUL 18-19, 2015
会议地点：
Wuhan, PEOPLES R CHINA
会议主办单位：
[Duan Xianzhe;Zheng Jian;Wang Xiaoning;Yang Bifeng;Song Jia;Feng Zhigang;Hu Yang] Univ South China, Sch Nucl Resources Engn, Hengyang 421001, Hunan, Peoples R China.^[Hu Yang] Univ South China, Post Doctoral Res Stn Min Engn, Hengyang 421001, Hunan, Peoples R China.^[Hu Yang] Univ South China, Cooperat Innovat Ctr Nucl Fuel Cycle Technol & Eq, Hengyang 421001, Hunan, Peoples R China.
关键词：
Sandstone-type uranium deposit;Chemical speciation of uranium;Sequential chemical extraction;In-situ Leaching
摘要：
Sequential chemical extraction procedure was modified from Tessier process and demonstrates its application to sandstone uranium exploration. Use it to study uranium speciation with six different samples from in-situ leaching sandstone-type uranium deposits. The chemical speciation of uranium in samples was classified into six speciation: the exchangeable ion, carbonates bound, sulfide-organic matter speciation bound, amorphous Fe-Mn oxides bound, sparry Fe-Mn oxides bound and the residual state. Through the research, the uranium distribution characteristics were significantly different whether they were in different samples or in the same sample. Therefore, the research on chemical speciation of uranium Deposit before the production is essential to reasonable evaluation of Deposit and can guide the technology of in-situ leaching uranium Deposit. It also can rich the mineralization mechanism of sandstone-type uranium Deposit.
摘要：
Calix[6] arene hydroxamic derivatives were synthesized by two steps using calix[6] arene, ethyl bromoacetate and hydroxylamine hydrochloride as the main raw materials, and were characterized by infrared spectroscopy. The extraction of U(VI) by calix[6] arene and its hydroxamic derivatives on various experimental conditions were studied. The extraction results showed that pH played an important role in the extraction system. Maximum extraction was observed at a pH of 5.0 within 20 min, and the dynamic extraction model corresponded to a pseudo-second order model.
摘要：
The pot experiment was conducted to compare the Uranium tolerance and uptake U from the contaminated soil by two kinds of herbaceous species:Chinese cabbage and Leaf lettuce.Chinese cabbage can show g
作者机构：
[Wangzhengqing; Liushan; Huyang; Xieyanshi; Duanxianzhe; Fengzhigang; Chenliang] Univ South China, Sch Nucl Resources Engn, Hengyang 421001, Hunan, Peoples R China.;[Huyang] Univ South China, Postdoctoral Res Stn Min Engn, Hengyang 421001, Hunan, Peoples R China.;[Huyang] Cooperat Innovat Ctr Nucl Fuel Cycle Technol & Eq, Hengyang 421001, Hunan, Peoples R China.;[Jiazhikun] Sinochem Petr Explorat & Prod Co Ltd, Beijing 100031, Peoples R China.
会议名称：
4th International Conference on Energy and Environmental Protection (ICEEP)
会议时间：
JUN 02-04, 2015
会议地点：
Shenzhen, PEOPLES R CHINA
会议主办单位：
[Huyang;Fengzhigang;Xieyanshi;Chenliang;Duanxianzhe;Wangzhengqing;Liushan] Univ South China, Sch Nucl Resources Engn, Hengyang 421001, Hunan, Peoples R China.^[Huyang] Univ South China, Postdoctoral Res Stn Min Engn, Hengyang 421001, Hunan, Peoples R China.^[Huyang] Cooperat Innovat Ctr Nucl Fuel Cycle Technol & Eq, Hengyang 421001, Hunan, Peoples R China.^[Jiazhikun] Sinochem Petr Explorat & Prod Co Ltd, Beijing 100031, Peoples R China.
关键词：
sandstone-type uranium deposit;chemical speciation of uranium;sequential chemical extraction;in-situ Leaching
摘要：
This paper presents a method of studying uranium speciation with six different hole depth and numbers from in-situ leaching sandstone-type uranium deposits by a sequential extraction procedure and demonstrates its application to sandstone uranium exploration. The chemical extraction procedure was modified from Tessier. The chemical speciation of uranium in samples was classified into six speciation: exchangeable ions, bound to carbonates, bound to sulfide-organic matter, bound to amorphous Fe-Mn oxides/bound to hydroxide, bound to sparry Fe-Mn oxides/bound to hydroxide and residual speciation. Studying the chemical speciation of uranium by method of sequential extraction show that the uranium distribution characteristics were significantly different whether they were in different samples or in the same sample. Therefore, a research on chemical speciation of Deposit behind the production is essential to reasonable evaluation of Deposit and guide the technology of in-situ leaching uranium Deposit. It also can rich the mineralization mechanism of sandstone-type uranium Deposit. The average amounts of bound to carbonates, exchangeable ions, bound to amorphous Fe-Mn oxides, residual speciation, bound to sulfide-organic matter and bound to sparry Fe-Mn oxides in order as 58.9%, 22.6%, 13.3%, 2.3%, 1.4% and 1.4%.
关键词：
Leaching of uranium;Sandstone uranium ores;Supercritical CO2 fluid
摘要：
Uranium is an important fuel for nuclear power, so the mining and milling of uranium is the base for development of nuclear power. Our experiments study is about the supercritical CO2 fluid extraction of uranium in low grade uranium ore, and the influence of aqueous medium, oxidants, chelating agents and other factors on the uranium leaching. In aqueous media, Fe2 (SO4)3 as the oxidants, supercritical CO2 fluid extraction of uranium has the best effect, the uranium leaching rate reaches 90.44%, significantly higher than that of the conventional acid and alkaline leaching. In the process of extraction of uranium in supercritical CO2 fluid, the uranium in uranium ore is first oxidized to hexavalent uranium, and then forms high solubility of uranyl carbonate complexes. Supercritical CO2 fluid is expected to be used in in-situ leaching of uranium mining of the low grade sandstone uranium deposits.
