干旱区生态环境知识资源中心(Arid): Leaching of El-Missikat low-grade fluoritized uranium ore by sulfuric acid: mechanism and kinetic

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DOI	10.1007/s10967-018-6289-z
	Leaching of El-Missikat low-grade fluoritized uranium ore by sulfuric acid: mechanism and kinetic
	Mohammed, Hesham Samir 1; Abdel-Monem, Yasser Kamal 2; El-Feky, Mohamed Galal 1; Omer, Sayed Ahmed 1; Ahmed, Mohammed Ramadan 1
通讯作者	Mohammed, Hesham Samir
来源期刊	JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
ISSN	0236-5731
EISSN	1588-2780
出版年	2019
卷号	319 期号:1 页码:245-255
英文摘要	A well-characterized low-grade fluoritized uranium samples from new occurrence in Gabal El-Missikat prospect, Eastern Desert, Egypt was subjected to sulfuric acid leaching. The effects of leaching parameters on uranium dissolution mechanism were investigated. The shrinking core model was used to model leaching reactions. The kinetics equations indicates that the reactions appear to be controlled by layer diffusion process. The activation energy for uranium dissolution was evaluated. Low activation energy value (2.54kJmol(-1)) confirm the diffusion layer mechanism. The presence of fluoride ions in the solution increases the dissolution of uranium. The optimum process operating parameters were: sulfuric acid concentration: 1.5M, solid-liquid ratio: 1:3, contact time 8h; agitation speed rate 200rpm; and ore particle size -75 mu m at temperature 60 degrees C, in the absence of an external oxidant. Under these experimental conditions, the extraction efficiency of uranium was about 91%.
英文关键词	El-Missikat Fluoritized Low-grade Diffusion layer
类型	Article
语种	英语
国家	Egypt
收录类别	SCI-E
WOS记录号	WOS:000458155900027
WOS关键词	DISSOLUTION
WOS类目	Chemistry, Analytical ; Chemistry, Inorganic & Nuclear ; Nuclear Science & Technology
WOS研究方向	Chemistry ; Nuclear Science & Technology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/217305
作者单位	1.Nucl Mat Author, POB 530, Cairo, Egypt; 2.Menoufia Univ, Dept Chem, Fac Sci, Shibin Al Kawm, Egypt
推荐引用方式 GB/T 7714	Mohammed, Hesham Samir,Abdel-Monem, Yasser Kamal,El-Feky, Mohamed Galal,et al. Leaching of El-Missikat low-grade fluoritized uranium ore by sulfuric acid: mechanism and kinetic[J],2019,319(1):245-255.
APA	Mohammed, Hesham Samir,Abdel-Monem, Yasser Kamal,El-Feky, Mohamed Galal,Omer, Sayed Ahmed,&Ahmed, Mohammed Ramadan.(2019).Leaching of El-Missikat low-grade fluoritized uranium ore by sulfuric acid: mechanism and kinetic.JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY,319(1),245-255.
MLA	Mohammed, Hesham Samir,et al."Leaching of El-Missikat low-grade fluoritized uranium ore by sulfuric acid: mechanism and kinetic".JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY 319.1(2019):245-255.