Highly selective dissolution and synchronous extraction of zinc from zinc-cobalt slag by an ionic liquid [Hbet][Tf2N]-H2O system: A novel method for separating zinc and cobalt

doi:10.1016/j.jclepro.2021.128301

	Highly selective dissolution and synchronous extraction of zinc from zinc-cobalt slag by an ionic liquid [Hbet][Tf2N]-H2O system: A novel method for separating zinc and cobalt
	Huang, Yukun 1,3; Duan, Zhuo 1; Bai, Ningning 1; Wang, Huijuan 1; Cao, Yijun 1; Song, Xiangyu 1; Peng, Weijun 1; Zhu, Xiaofeng 2
刊名	JOURNAL OF CLEANER PRODUCTION
	2021-09-15
卷号	315
关键词	Zinc-cobalt slag [Hbet][Tf2N] Selective dissolution Extraction Separation
ISSN号	0959-6526
DOI	10.1016/j.jclepro.2021.128301
英文摘要	Zinc-cobalt slag produced from zinc hydrometallurgical process is a hazardous solid waste containing heavy metal ions; it is a secondary source of cobalt. Separating zinc and cobalt is the key problem in the comprehensive recovery. Here, a novel clean method for separating zinc and cobalt using a carboxyl-functionalized ionic liquid, ([Hbet][Tf2N]), is proposed. This innovative method provides a dual separation mode with selective dissolution and extraction during the heating and cooling of the [Hbet][Tf2N]-H2O system, and a higher separation effect on zinc and cobalt is obtained. The dissolution ratio of zinc oxide is 92.6% at 90 degrees C and 60 min, whereas the dissolution of cobalt and manganese is negligible (5.37% and 0.05%, respectively). The selective dissolution of metal oxide MxOy in [Hbet][Tf2N]-H2O is explained using a U/x value that correlates with the lattice energy, U, of metal oxide. In addition, the recovery of Zn and regeneration of the ionic liquid is implemented by back extraction of Zn-loaded [Hbet][Tf2N] using an oxalic acid solution. This study presents an efficient method for separating of zinc and cobalt using a dual-mode selective dissolution and synchronous extraction, which is a promising technique for separating similar metallic elements.
WOS研究方向	Science & Technology - Other Topics ; Engineering ; Environmental Sciences & Ecology
语种	英语
出版者	ELSEVIER SCI LTD
WOS记录号	WOS:000689721200002
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/148835]
专题	材料科学与工程学院
作者单位	1.Zhengzhou Univ, Sch Chem Engn, Zhengzhou 450001, Peoples R China; 2.Lanzhou Univ Technol, State Key Lab Adv Proc & Recycling Nonferrous Met, Lanzhou 730050, Peoples R China; 3.Zhengzhou Univ, Prov & Ministerial Coconstruct Collaborat Innovat, Zhengzhou 450001, Peoples R China
推荐引用方式 GB/T 7714	Huang, Yukun,Duan, Zhuo,Bai, Ningning,et al. Highly selective dissolution and synchronous extraction of zinc from zinc-cobalt slag by an ionic liquid [Hbet][Tf2N]-H2O system: A novel method for separating zinc and cobalt[J]. JOURNAL OF CLEANER PRODUCTION,2021,315.
APA	Huang, Yukun.,Duan, Zhuo.,Bai, Ningning.,Wang, Huijuan.,Cao, Yijun.,...&Zhu, Xiaofeng.(2021).Highly selective dissolution and synchronous extraction of zinc from zinc-cobalt slag by an ionic liquid [Hbet][Tf2N]-H2O system: A novel method for separating zinc and cobalt.JOURNAL OF CLEANER PRODUCTION,315.
MLA	Huang, Yukun,et al."Highly selective dissolution and synchronous extraction of zinc from zinc-cobalt slag by an ionic liquid [Hbet][Tf2N]-H2O system: A novel method for separating zinc and cobalt".JOURNAL OF CLEANER PRODUCTION 315(2021).