The crud formation during the long-term operation of the V(V) and Cr(VI) extraction

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	The crud formation during the long-term operation of the V(V) and Cr(VI) extraction
	Ning, Pengge ; Cao, Hongbin 1; Lin, Xiao ; Zhang, Yi
刊名	HYDROMETALLURGY
	2013-05-01
卷号	137 期号:0 页码:133-139
关键词	Extraction V(V) and Cr(VI) Interfacial crud Stabilization mechanism
英文摘要	The roles of the emulsifiers in the crud formation during the long-term operation during the vanadium and chromium extraction were studied. The crud produced in the long-term operation of extraction was determined by GC-MS for organic phase and XPS for solid particles. The results indicate that the redox reaction occurs between Cr(VI) and organic compounds, and the reduction products of Cr(VI) induce more stable emulsion. Additionally, the roles of other types of solid particles and organic compounds confirmed before were carried out by thermodynamic calculation and experiments combined with discussion. Three-dimensional network structure of silica and precipitation of various cations act as the major incentives to stimulate the emulsion. Whereafter, crystallization of sodium sulfate and the reduction of Cr(VI) take place at the surface of emulsion droplet, and the organic compounds are prone to be adsorbed by these fine solids which subsequently consolidate the newly formed surface of droplet. The interactions between emulsion droplets were calculated according to the extended DLVO theory. The comprehensive stabilization mechanisms were also proposed, including the composite interfacial film mechanism, the steric hindrance mechanism and the double electric layer mechanism. (C) 2013 Elsevier B.V. All rights reserved.
WOS标题词	Science & Technology ; Technology
类目[WOS]	Metallurgy & Metallurgical Engineering
研究领域[WOS]	Metallurgy & Metallurgical Engineering
关键词[WOS]	SOLVENT-EXTRACTION ; STABILIZED EMULSIONS ; CHROMIUM ; VANADIUM ; PARTICLES ; WATER
收录类别	SCI
语种	英语
WOS记录号	WOS:000322926600019
公开日期	2015-05-27
内容类型	期刊论文
源URL	[http://ir.ipe.ac.cn/handle/122111/13764]
专题	过程工程研究所_研究所（批量导入）
作者单位	1.Chinese Acad Sci, Res Ctr Proc Pollut Control, Inst Proc Engn, Beijing 100190, Peoples R China 2.Chinese Acad Sci, Inst Proc Engn, Key Lab Green Proc & Engn, Beijing 100190, Peoples R China 3.Natl Engn Lab Hydromet Cleaner Prod Technol, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	Ning, Pengge,Cao, Hongbin,Lin, Xiao,et al. The crud formation during the long-term operation of the V(V) and Cr(VI) extraction[J]. HYDROMETALLURGY,2013,137(0):133-139.
APA	Ning, Pengge,Cao, Hongbin,Lin, Xiao,&Zhang, Yi.(2013).The crud formation during the long-term operation of the V(V) and Cr(VI) extraction.HYDROMETALLURGY,137(0),133-139.
MLA	Ning, Pengge,et al."The crud formation during the long-term operation of the V(V) and Cr(VI) extraction".HYDROMETALLURGY 137.0(2013):133-139.