Study on the extraction of dyes into a room-temperature ionic liquid and their mechanisms

Changping Li; Baoping Xin; Wenguo Xu; Qi Zhang

doi:10.1002/jctb.1656

Study on the extraction of dyes into a room-temperature ionic liquid and their mechanisms

Changping Li, Baoping Xin^*, Wenguo Xu, Qi Zhang

^*Corresponding author for this work

Beijing Institute of Technology

Research output: Contribution to journal › Article › peer-review

63 Citations (Scopus)

Abstract

The investigation of liquid-liquid extraction of dyes is carried out by using ionic liquid - 1-butyl-3-methylimidazolium hexafluorophosphate ([BMIM][PF₆]) - as extraction phase. The effects of its process parameters are studied in detail, such as extraction phase ratio, pH of the aqueous phase, and concentration of dicyclohexyl-18-crown-6 (DCH-18C6) in the organic phase. Important results are obtained as follows: acid dyes can be extracted with [BMIM][PF₆] quantitatively; the removal of reactive dyes is low; however, it can be greatly increased by the addition of DCH-18C6. The pH value has a great impact on the removal of the acid dye and the reactive dye. However, it does not influence the extraction of the weak acid dye. It is found that the extraction process of acid dyes adopts the form of anion exchange and the soluble part of the ionic liquid plays an important role as counter-ions.

Original language	English
Pages (from-to)	196-204
Number of pages	9
Journal	Journal of Chemical Technology and Biotechnology
Volume	82
Issue number	2
DOIs	https://doi.org/10.1002/jctb.1656
Publication status	Published - Feb 2007

Keywords

Dye wastewater
Extraction
Mechanisms
Room-temperature ionic liquids

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1002/jctb.1656

Cite this

@article{407f637509174f8d8b8dfdd298d45124,

title = "Study on the extraction of dyes into a room-temperature ionic liquid and their mechanisms",

abstract = "The investigation of liquid-liquid extraction of dyes is carried out by using ionic liquid - 1-butyl-3-methylimidazolium hexafluorophosphate ([BMIM][PF6]) - as extraction phase. The effects of its process parameters are studied in detail, such as extraction phase ratio, pH of the aqueous phase, and concentration of dicyclohexyl-18-crown-6 (DCH-18C6) in the organic phase. Important results are obtained as follows: acid dyes can be extracted with [BMIM][PF6] quantitatively; the removal of reactive dyes is low; however, it can be greatly increased by the addition of DCH-18C6. The pH value has a great impact on the removal of the acid dye and the reactive dye. However, it does not influence the extraction of the weak acid dye. It is found that the extraction process of acid dyes adopts the form of anion exchange and the soluble part of the ionic liquid plays an important role as counter-ions.",

keywords = "Dye wastewater, Extraction, Mechanisms, Room-temperature ionic liquids",

author = "Changping Li and Baoping Xin and Wenguo Xu and Qi Zhang",

year = "2007",

month = feb,

doi = "10.1002/jctb.1656",

language = "English",

volume = "82",

pages = "196--204",

journal = "Journal of Chemical Technology and Biotechnology",

issn = "0268-2575",

publisher = "John Wiley and Sons Ltd",

number = "2",

}

TY - JOUR

T1 - Study on the extraction of dyes into a room-temperature ionic liquid and their mechanisms

AU - Li, Changping

AU - Xin, Baoping

AU - Xu, Wenguo

AU - Zhang, Qi

PY - 2007/2

Y1 - 2007/2

N2 - The investigation of liquid-liquid extraction of dyes is carried out by using ionic liquid - 1-butyl-3-methylimidazolium hexafluorophosphate ([BMIM][PF6]) - as extraction phase. The effects of its process parameters are studied in detail, such as extraction phase ratio, pH of the aqueous phase, and concentration of dicyclohexyl-18-crown-6 (DCH-18C6) in the organic phase. Important results are obtained as follows: acid dyes can be extracted with [BMIM][PF6] quantitatively; the removal of reactive dyes is low; however, it can be greatly increased by the addition of DCH-18C6. The pH value has a great impact on the removal of the acid dye and the reactive dye. However, it does not influence the extraction of the weak acid dye. It is found that the extraction process of acid dyes adopts the form of anion exchange and the soluble part of the ionic liquid plays an important role as counter-ions.

AB - The investigation of liquid-liquid extraction of dyes is carried out by using ionic liquid - 1-butyl-3-methylimidazolium hexafluorophosphate ([BMIM][PF6]) - as extraction phase. The effects of its process parameters are studied in detail, such as extraction phase ratio, pH of the aqueous phase, and concentration of dicyclohexyl-18-crown-6 (DCH-18C6) in the organic phase. Important results are obtained as follows: acid dyes can be extracted with [BMIM][PF6] quantitatively; the removal of reactive dyes is low; however, it can be greatly increased by the addition of DCH-18C6. The pH value has a great impact on the removal of the acid dye and the reactive dye. However, it does not influence the extraction of the weak acid dye. It is found that the extraction process of acid dyes adopts the form of anion exchange and the soluble part of the ionic liquid plays an important role as counter-ions.

KW - Dye wastewater

KW - Extraction

KW - Mechanisms

KW - Room-temperature ionic liquids

UR - http://www.scopus.com/inward/record.url?scp=33847675294&partnerID=8YFLogxK

U2 - 10.1002/jctb.1656

DO - 10.1002/jctb.1656

M3 - Article

AN - SCOPUS:33847675294

SN - 0268-2575

VL - 82

SP - 196

EP - 204

JO - Journal of Chemical Technology and Biotechnology

JF - Journal of Chemical Technology and Biotechnology

IS - 2

ER -

Study on the extraction of dyes into a room-temperature ionic liquid and their mechanisms

Abstract

Keywords

UN SDGs

Access to Document

Other files and links

Cite this