作者机构：
[谢水波; 周帅; 王文涛; 唐振平; 马华龙; 高媛媛] Hunan Provincial Key Laboratory of Pollution Control and Resources Technology, University of South China, Hengyang 421001, China;[谢水波] Key Discipline Lab of 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, China
通讯机构：
[Tan, Kaixuan] U;Univ South China, Sch Nucl Resources Engn, Hengyang 421001, Peoples R China.
关键词：
Complex surfactant;Leaching kinetics;Resin adsorption and elution;Low permeable sandstone uranium deposit;In-situ leaching of uranium mining
摘要：
Applications of a complex surfactant developed in-house to in-situ leaching of low permeable sandstone uranium deposits are described based on results from agitation leaching, column leaching, resin adsorption, and elution experiments using uranium containing solution from the in-situ leaching site. The results of agitation leaching experiments show that adding surfactant with different concentrations into leaching solution improves the leaching rate of uranium. The maximum leaching rate of uranium from agitation leaching reached 92.6% at an added surfactant concentration of 10 mg/l. Result of column leaching experiment shows that adding surfactant with varying concentrations into leaching solutions increased the permeability coefficient of ore-bearing layer by 42.7-86.8%. The leaching rate of uranium from column leaching increased by 58.0% and reached 85.8%. The result of kinetic analysis shows that for the extraction of uranium controlled by diffusion without surfactant the apparent rate constant 0.0023/d changed to 0.0077/d for the extraction with surfactant controlled by both diffusion and surface chemical reactions. Results from resin adsorption and elution experiments show that there was no influence on resin adsorption and elution of uranium with an addition of 50 mg/l surfactant to production solution from in-situ leaching. The adsorption curve, sorption capacity of resin, recycling of resin remained the same as without adding any surfactant. Introducing complex surfactant to leaching solution increased the peak concentration of uranium in eluents, reduced the residual uranium content in resin, and promoted the elution efficiency. The method of using a complex surfactant for in-situ leaching is useful for low permeable sandstone uranium deposits. (C) 2014 Elsevier B.V. All rights reserved.
摘要：
In order to investigate the mechanism of extracellular polymeric substances (EPS) influencing sludge characteristics, variations of extractable EPS from municipal sewage sludge by acid/alkaline pretreatment and gamma-ray irradiation were studied. The changes in constituents of EPS were analyzed by UV-vis spectra and SEM images. The effects of alkaline pretreatment and gamma-ray irradiation on the functional groups in EPS were investigated by Fourier transform infrared (FTIR) spectrometer. Results showed that the extractable EPS increased clearly with increasing irradiation dose from 0 to 15 kGy. UV-vis spectra indicated that a new absorption band from 240 nm to 300 nm existed in all irradiated samples, apart from acid condition. The results of FTIR spectroscopic analysis indicated that, irradiation influenced major functional groups in EPS, such as protein and polysaccharide, and these effects were clearer under alkaline condition. SEM images provided that after alkaline hydrolysis, gamma-ray irradiation was more effective in resulting in the sludge flocs and cells broken, compared with acid pretreatment (pH 2.50). (c) 2013 Published by Elsevier Ltd.
作者机构：
[贺永强; 杨仕教] School of Nuclear Resources Engineering, University of South China, Hengyang , China;[陈荣] School of Environment and Safety Engineering, University of South China, Hengyang , China;[罗辉] Geotechnical Engineering Research Center, Hunan Yanneng Design Studies Ltd., Hengyang , China
通讯机构：
School of Nuclear Resources Engineering, University of South China, Hengyang, China
作者机构：
[李乾; 张琪; 杨敬; 胡鄂明; 张洪灿; 王清良] School of Nuclear Resource Engineering, University of South China, Hengyang 421001, Hunan, China;[张琪] Shuidong Middle School, Nayong 553308, Guizhou, China
通讯机构：
School of Nuclear Resource Engineering, University of South China, China
期刊：
BioTechnology: An Indian Journal,2014年10(6):1640-1643 ISSN：0974-7435
通讯作者：
Xie, Shui-Bo
作者机构：
[Xie, Shui-Bo; Yang, Rui-Li; Zeng, Tao-Tao; Rong, Li-Shan] Hunan Provincial Key Laboratory of Pollution Control and Resources Technology, University of South China, Hengyang, China;[Wu, Wei-Lin] Hunan Sheng Long Project Management Ltd, Zhuzhou, China;[Xie, Shui-Bo] Key Discipline Lab. for National Defense for Biotechnology in Uranium Mining and Hydrometallurgy, University of South China, Hengyang, China
通讯机构：
[Xie, S.-B.] H;Hunan Provincial Key Laboratory of Pollution Control and Resources Technology, University of South ChinaChina
关键词：
Experiment;Gray relational analysis;Pseudomonas aeruginosa loaded by nano-Fe3O4 (NFPA);Uranium
作者机构：
[叶勇军; 李峰; 丁德馨] Key Discipline Lab. for National Defense for Biotechnology in Uranium Mining and Hydrometallurgy, University of South China, Hengyang 421001, China;[叶勇军; 钟永明] School of Environment Protection and Safety Engineering, University of South China, Hengyang 421001, China
通讯机构：
Key Discipline Lab. for National Defense for Biotechnology in Uranium Mining and Hydrometallurgy, University of South China, China
作者机构：
[贺桂成] School of Resources and Safety Engineering, Central South University, Changsha, Hunan 410083, China;[张志军; 刘永; 贺桂成; 丁德馨] School of Nuclear Resources and Nuclear Fuel Engineering, University of South China, Hengyang, Hunan 421001, China
通讯机构：
[Liu, Y.] S;School of Nuclear Resources and Nuclear Fuel Engineering, University of South China, China
作者机构：
[刘金香; 刘迎九; 王劲松; 段毅; 谢水波] Key Laboratory of Pollution Control and Resources Reuse Technology of Hunan Province, University of South China, Hengyang 421001, Hunan, China;[谢水波] Key Discipline Lab. of National Defence for Biotechnology in Uranium Mining and Hydrometallurgy, University of South China, Hengyang 421001, Hunan, China
通讯机构：
Key Laboratory of Pollution Control and Resources Reuse Technology of Hunan Province, University of South China, China
作者机构：
[叶勇军; 胡南; 李广悦; 宋键斌; 扶海鹰; 丁德馨] Key Discipline Lab. for National Defense for Biotechnology in Uranium Mining and Hydrometallurgy, University of South China, Hengyang 421001, China
通讯机构：
Key Discipline Lab. for National Defense for Biotechnology in Uranium Mining and Hydrometallurgy, University of South China, China
作者机构：
[叶勇军; 李广悦; 李峰; 宋键斌; 丁德馨] Key Discipline Lab. for National Defense for Biotechnology in Uranium Mining and Hydrometallurgy, University of South China, Hengyang, Hunan 421001, China
通讯机构：
Key Discipline Lab. for National Defense for Biotechnology in Uranium Mining and Hydrometallurgy, University of South China, China
作者机构：
[张洪灿; 张国奇; 胡鄂明; 胡南; 王清良; 丁德馨] Key Discipline Lab for National Defense for Biotechnology in Uranium Mining and Hydrometallurgy, University of South China, Hengyang 421001, China;[蒋晓辉; 阳奕汉] Tianshan Uranium Corporation, China National Nuclear Corporation, Yining 835000, China;[王清良] School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China
通讯机构：
Key Discipline Lab for National Defense for Biotechnology in Uranium Mining and Hydrometallurgy, University of South China, China
作者机构：
[刘玉龙; 丁德馨; 李广悦; 胡南] Key Discipline Lab. for National Defense for Biotechnology in Uranium Mining and Hydrometallurgy, University of South China, Hengyang, Hunan 421001, China
通讯机构：
[Liu, Y.-L.] K;Key Discipline Lab. for National Defense for Biotechnology in Uranium Mining and Hydrometallurgy, University of South China, China
摘要：
A uranium mill tailings, located in Guangdong, was selected for spatial distribution of the radon exhalation rates measured by local static method. The two-dimension surface of radon exhalation rates was established by Surfer using the data of spatial distribution of radon exhalation rates measured at August 14, 2007 to 19 and 21, which was analyzed by fractal method of projective covering. The results show that the two-dimension surface of radon exhalation rates is of fractal structure. The fractal dimension of surface of radon exhalation rates from August 14, 2007 to 19 and 21 are 2.0535, 2.0173, 2.0029, 2.0084, 2.0079, 2.0057 and 2.0034, respectively, which indicates that the complexity of spatial distribution of the radon exhalation rates at 14 and 15 are larger than that of the other days. The phenomenon results from the change of precipitation and temperature, as well as the features of uranium mill tailings, including mineral composition, particle size, radium content, porosity and pore connectivity, etc.
摘要：
According to the practical conditions of the island coal face in No.2 Coal Mine of Pingdingshan Coal Company Ltd., China, the strata behaviors and methane emission were monitored and their two relationships were analyzed. The results indicate that strata behavior at coal face affects its methane emission rates at coal wall and goaf, which the quantity of methane emission rate at coal face is largely increasing after main roof weighting. So through the monitor of periodic roof weighting time, larger methane emission rate at coal face can be predicted. Then the related methane control measures can be taken timely.
