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Efficient halide separation via ZnXn(n-2)- complexes: Influencing factors and mechanism
Li, Jian1,2,3; Zhang, Hui1,2; Zhang, Jingjing1,2,3; Xiao, Qinggui1,2; Du, Xuan1,2; Qi, Tao1,2
2020-03-01
Source PublicationSEPARATION AND PURIFICATION TECHNOLOGY
ISSN1383-5866
Volume234Pages:8
AbstractIn 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.
KeywordHalide Complexation extraction Alamine336 Separation
DOI10.1016/j.seppur.2019.116047
Language英语
WOS KeywordSOLVENT-EXTRACTION ; AQUEOUS-SOLUTIONS ; CHLORIDE SOLUTIONS ; BROMIDE REMOVAL ; ZINC-SULFATE ; IRON IONS ; RECOVERY ; EQUILIBRIUM ; IODIDE ; COPPER
Funding ProjectKey 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 Research AreaEngineering
WOS SubjectEngineering, Chemical
Funding OrganizationKey Research Program of the Frontier Sciences of CAS ; Science and Technology Service Network Initiative of,CAS ; National Natural Science Foundation of China
WOS IDWOS:000491627200064
PublisherELSEVIER
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/39083
Collection中国科学院过程工程研究所
Corresponding AuthorZhang, Hui; Qi, Tao
Affiliation1.Chinese Acad Sci, Inst Proc Engn, Natl Engn Lab Hydromet Cleaner Prod Technol, Beijing 100190, Peoples R China
2.Chinese Acad Sci, Inst Proc Engn, Key Lab Green Proc & Engn, Beijing 100190, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
Recommended Citation
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.
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