Efficient halide separation via ZnXn(n-2)- complexes: Influencing factors and mechanism

doi:10.1016/j.seppur.2019.116047

	Efficient halide separation via ZnXn(n-2)- complexes: Influencing factors and mechanism
	Li, Jian 1,2,3; Zhang, Hui 2,3; Zhang, Jingjing 1,2,3; Xiao, Qinggui 2,3; Du, Xuan 2,3; Qi, Tao 2,3
刊名	SEPARATION AND PURIFICATION TECHNOLOGY
	2020-03-01
卷号	234 页码:8
关键词	Halide Complexation extraction Alamine336 Separation
ISSN号	1383-5866
DOI	10.1016/j.seppur.2019.116047
英文摘要	In most chemical plants, it is hard to utilize/recycle the high-salinity wastewater containing chloride and sulfate because the separation of them is rarely cheap and waste-free. Herein, an efficient separation process was proposed via the complexation and the extraction of ZnXn(n-2)-. Because of the characteristics of different ions, halide ions exhibited regular complexation properties and extraction ratios. The extraction efficiencies of all halides were enhanced owing to the formation of ZnXn(n-2)-. More interestingly, 82.6% of F-, 88.6% of Br- and 99.6% of I- could be selectively extracted even in chloride-riched solution with a limited Zn2+ dosage and only about 16.3% of chloride was extracted at the same time. High selectivity would promise wide applications, such as removing fluoride ions from electrolyte solutions, recovering bromide and iodide ions from brine resources, and separating different halide ions, etc. As the model, the extraction of chloride was investigated to reveal the key factors and the mechanism. The extraction efficiency increased with increases in the phase volume ratio and the zinc/chloride molar ratio. After a two-stage counter-current extraction, the concentration of Cl in the raffinate could be reduced from 100 g/L to 10 g/L. Chloride was mainly extracted as ZnCl3-, as predicted by theoretical calculations and confirmed experimentally.
资助项目	Key Research Program of the Frontier Sciences of CAS[QYZDJ-SSW-JSCO21] ; Science and Technology Service Network Initiative of,CAS[KFJ-SW-STS-148] ; Science and Technology Service Network Initiative of,CAS[KFJ-STS-QYZD-011] ; National Natural Science Foundation of China[21506233] ; National Natural Science Foundation of China[51402303] ; National Natural Science Foundation of China[21606241] ; National Natural Science Foundation of China[21978304] ; National Natural Science Foundation of China[51374191]
WOS关键词	SOLVENT-EXTRACTION ; AQUEOUS-SOLUTIONS ; CHLORIDE SOLUTIONS ; BROMIDE REMOVAL ; ZINC-SULFATE ; IRON IONS ; RECOVERY ; EQUILIBRIUM ; IODIDE ; COPPER
WOS研究方向	Engineering
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000491627200064
资助机构	Key Research Program of the Frontier Sciences of CAS ; Science and Technology Service Network Initiative of,CAS ; National Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://ir.ipe.ac.cn/handle/122111/39082]
专题	中国科学院过程工程研究所
通讯作者	Zhang, Hui; Qi, Tao
作者单位	1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Inst Proc Engn, Natl Engn Lab Hydromet Cleaner Prod Technol, Beijing 100190, Peoples R China 3.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	Li, Jian,Zhang, Hui,Zhang, Jingjing,et al. Efficient halide separation via ZnXn(n-2)- complexes: Influencing factors and mechanism[J]. SEPARATION AND PURIFICATION TECHNOLOGY,2020,234:8.
APA	Li, Jian,Zhang, Hui,Zhang, Jingjing,Xiao, Qinggui,Du, Xuan,&Qi, Tao.(2020).Efficient halide separation via ZnXn(n-2)- complexes: Influencing factors and mechanism.SEPARATION AND PURIFICATION TECHNOLOGY,234,8.
MLA	Li, Jian,et al."Efficient halide separation via ZnXn(n-2)- complexes: Influencing factors and mechanism".SEPARATION AND PURIFICATION TECHNOLOGY 234(2020):8.