干旱区生态环境知识资源中心(Arid): Thermodynamic and Kinetic Studies of Uranium and REEs Leaching by Oxalic Acid from Abu-Tartur Phosphate Rock, Western Desert, Egypt

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DOI	10.1134/S106636222003008X
	Thermodynamic and Kinetic Studies of Uranium and REEs Leaching by Oxalic Acid from Abu-Tartur Phosphate Rock, Western Desert, Egypt
	Bakry, A. R.; Hashim, M. D.; Elwy, A. M.
通讯作者	Bakry, AR
来源期刊	RADIOCHEMISTRY
ISSN	1066-3622
EISSN	1608-3288
出版年	2020
卷号	62 期号:3 页码:359-367
英文摘要	Leaching of uranium and REEs with oxalic acid from the Egyptian Abu-Tartur phosphate rock (PR) was studied. The effect exerted on the leaching process by oxalic acid concentration, agitation time, solid to liquid ratio, and leaching temperature was determined. The leaching kinetics of uranium and REEs were evaluated by the shrinking core model. The uranium and REEs leaching kinetics is controlled by diffusion through the fluid film. The activation energy is 5.9 kJ/mol for U and 5.3 kJ/mol for REEs. Equations describing the leaching kinetics were obtained. The optimum conditions are oxalic acid concentration of 0.5 M, agitation time of 2 h, solid to liquid ratio of 1/4, and temperature of 70 degrees C. Under these conditions, the degree of leaching of uranium and REEs reached 92 and 81%, respectively.
英文关键词	uranium rare earth elements phosphate rocks oxalic acid leaching
类型	Article
语种	英语
收录类别	ESCI
WOS记录号	WOS:000546701000008
WOS关键词	RARE-EARTH-ELEMENTS ; PHOSPHORUS RELEASE ; BENEFICIATION ; CARBONATE ; ORES
WOS类目	Chemistry, Analytical ; Chemistry, Inorganic & Nuclear
WOS研究方向	Chemistry
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/334454
作者单位	[Bakry, A. R.; Hashim, M. D.; Elwy, A. M.] Nucl Mat Author, Cairo 11742, Egypt
推荐引用方式 GB/T 7714	Bakry, A. R.,Hashim, M. D.,Elwy, A. M.. Thermodynamic and Kinetic Studies of Uranium and REEs Leaching by Oxalic Acid from Abu-Tartur Phosphate Rock, Western Desert, Egypt[J],2020,62(3):359-367.
APA	Bakry, A. R.,Hashim, M. D.,&Elwy, A. M..(2020).Thermodynamic and Kinetic Studies of Uranium and REEs Leaching by Oxalic Acid from Abu-Tartur Phosphate Rock, Western Desert, Egypt.RADIOCHEMISTRY,62(3),359-367.
MLA	Bakry, A. R.,et al."Thermodynamic and Kinetic Studies of Uranium and REEs Leaching by Oxalic Acid from Abu-Tartur Phosphate Rock, Western Desert, Egypt".RADIOCHEMISTRY 62.3(2020):359-367.