Efficient separation of vanadium from chromium by a novel ionic liquid-based synergistic extraction strategy

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	Efficient separation of vanadium from chromium by a novel ionic liquid-based synergistic extraction strategy
	Zhao, Junmei; Hu, Qiaoyu; Li, Yingbo; Liu, Huizhou
刊名	CHEMICAL ENGINEERING JOURNAL
	2015-03-15
卷号	264 期号:MAR 页码:487-496
关键词	[A336][NO3] Acidified N1923 Vanadium(V) Chromium(IV) IL-based extraction
ISSN号	1385-8947
通讯作者	Zhao, JM (reprint author), Chinese Acad Sci, Inst Proc Engn, Key Lab Green Proc & Engn, 1 Bei Er Tiao, Beijing 100190, Peoples R China.
英文摘要	Ionic liquid (IL)-based extraction is a promising and environmentally benign separation technology. To develop sustainable extraction technologies, quaternary ammonium-based IL extraction strategy is attractable. In this work, the separation of vanadium(V) from chromium(VI) by pure tricaprylmethylammonium nitrate ([A336][NO3]) and organic acidified primary amine N1923 ([RNH3][NO3]) was systematically investigated. The optimal proportion of [A336][NO3] and [RNH3][NO3] was studied and results showed that the mixed [A336][NO3] and [RNH3][NO3] exhibited an obvious synergistic-effect for V(V). The extraction of V(V) was strongly dependent on the acidity of the aqueous phase and reaches maximum at pH 2.5-3, while the maximum separation coefficient (beta(v/cr)) was located at about pH 9.0. Moreover, beta(v/cr) could be improved through adjusting the molar concentration ratio of V/Cr. The interference of coexisting anions (nitrates, chlorides, sulfate and phosphate) on the extraction of V(V) was examined and the results showed that PO43-, NO3- and Cl- had negative effects at various degrees except for SO42-. The V(V) extraction behaviors could be properly described by Langmuir and pseudo-second-order rate equations. The maximum extraction capacity for V(V) was estimated as 1.877 mmol/g at 303 K. Increased temperature had little effect on the extraction capacity, but greatly improved the extraction rate. The typical anion exchange mechanism between NO3- and V4O124- (or V3O93-) was proposed for the current extraction system. The IL phase could be renewed through stripping the loaded vanadium by a 0.5 M NaNO3 solution. This work demonstrated that quaternary ammonium IL containing a commercial organic extractant is an efficient and sustainable IL-based extraction strategy for the separation of vanadium from chromium, and as a result, the development of an IL-based extraction process is straightforwardly envisaged. (C) 2014 Elsevier B.V. All rights reserved.
学科主题	Engineering
WOS标题词	Science & Technology ; Technology
类目[WOS]	Engineering, Environmental ; Engineering, Chemical
研究领域[WOS]	Engineering
关键词[WOS]	SOLVENT-EXTRACTION ; SELECTIVE EXTRACTION ; AQUEOUS-SOLUTIONS ; TEMPERATURE ; ACID ; OXIDATION ; MEDIA ; WATER ; IMIDAZOLIUM ; RECOVERY
收录类别	SCI
语种	英语
WOS记录号	WOS:000350191800054
内容类型	期刊论文
源URL	[http://ir.ipe.ac.cn/handle/122111/13809]
专题	过程工程研究所_研究所（批量导入）
作者单位	Chinese Acad Sci, Inst Proc Engn, Key Lab Green Proc & Engn, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	Zhao, Junmei,Hu, Qiaoyu,Li, Yingbo,et al. Efficient separation of vanadium from chromium by a novel ionic liquid-based synergistic extraction strategy[J]. CHEMICAL ENGINEERING JOURNAL,2015,264(MAR):487-496.
APA	Zhao, Junmei,Hu, Qiaoyu,Li, Yingbo,&Liu, Huizhou.(2015).Efficient separation of vanadium from chromium by a novel ionic liquid-based synergistic extraction strategy.CHEMICAL ENGINEERING JOURNAL,264(MAR),487-496.
MLA	Zhao, Junmei,et al."Efficient separation of vanadium from chromium by a novel ionic liquid-based synergistic extraction strategy".CHEMICAL ENGINEERING JOURNAL 264.MAR(2015):487-496.