干旱区生态环境知识资源中心(Arid): Gold Leaching Using Thiourea from Uranium Tailing Material, Gabal El-Missikat, Central Eastern Desert, Egypt

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DOI	10.1007/s40831-020-00295-2
	Gold Leaching Using Thiourea from Uranium Tailing Material, Gabal El-Missikat, Central Eastern Desert, Egypt
	Ahmed, Mohammed R.; Mohammed, Hesham S.; El-Feky, Mohamed G.; Abdel-Monem, Yasser K.
通讯作者	Mohammed, HS
来源期刊	JOURNAL OF SUSTAINABLE METALLURGY
ISSN	2199-3823
EISSN	2199-3831
出版年	2020
卷号	6 期号:4 页码:599-611
英文摘要	The objective of this study was to investigate thiourea leaching of gold present in the uranium tailings. Sulfuric acid treatment for raw material is important in order to dissolve uranium as well as to remove easily leachable metals. The acidic thiourea solution was proposed as a non-toxic possible alternative process route to cyanide in gold dissolution. The acidic system of thiourea-sodium sulfite was studied in the gold dissolution process. The presence of sodium sulfite can significantly reduce thiourea decomposition, accelerate the gold dissolution process, decrease the leaching time, and decrease the activation energy of gold dissolution. The activation energy for gold dissolution was evaluated. The activation energy solution with sodium sulfite is 7.62 kJ mol(-1) which is much lower than 9.32 kJ mol(-1) in the absence of sodium sulfite. Low activation energy confirms the surface reaction dissolution mechanism. This method demonstrates the possibility of extracting gold directly from low-grade ores without any physical or chemical pre-concentration method with a more environmentally friendly process.
英文关键词	Acidic pretreatment Waste as raw material Cyanide-free Formamidine disulfide Sodium sulfite FTIR
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000578800700001
WOS关键词	ORE ; EXTRACTION ; RECOVERY ; CYANIDE ; BIOOXIDATION ; ENHANCEMENT ; CONCENTRATE ; DISSOLUTION ; MECHANISM ; SILVER
WOS类目	Green & Sustainable Science & Technology ; Metallurgy & Metallurgical Engineering
WOS研究方向	Science & Technology - Other Topics ; Metallurgy & Metallurgical Engineering
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/328361
作者单位	[Ahmed, Mohammed R.; Mohammed, Hesham S.; El-Feky, Mohamed G.] Nucl Mat Author, POB 530, Cairo, Egypt; [Abdel-Monem, Yasser K.] Menoufia Univ, Fac Sci, Dept Chem, Shibin Al Kawm, Egypt
推荐引用方式 GB/T 7714	Ahmed, Mohammed R.,Mohammed, Hesham S.,El-Feky, Mohamed G.,et al. Gold Leaching Using Thiourea from Uranium Tailing Material, Gabal El-Missikat, Central Eastern Desert, Egypt[J],2020,6(4):599-611.
APA	Ahmed, Mohammed R.,Mohammed, Hesham S.,El-Feky, Mohamed G.,&Abdel-Monem, Yasser K..(2020).Gold Leaching Using Thiourea from Uranium Tailing Material, Gabal El-Missikat, Central Eastern Desert, Egypt.JOURNAL OF SUSTAINABLE METALLURGY,6(4),599-611.
MLA	Ahmed, Mohammed R.,et al."Gold Leaching Using Thiourea from Uranium Tailing Material, Gabal El-Missikat, Central Eastern Desert, Egypt".JOURNAL OF SUSTAINABLE METALLURGY 6.4(2020):599-611.