Please use this identifier to cite or link to this item: https://doi.org/10.1016/j.jwpe.2017.01.011
Title: Investigation into bulk liquid membranes for removal of chromium(VI) from simulated wastewater
Authors: Han, Aijuan 
Zhang, Hongwei 
Sun, Jiulong
Chuah, Gaik-Khuan 
Jaenicke, Stephan 
Keywords: Science & Technology
Technology
Physical Sciences
Engineering, Environmental
Engineering, Chemical
Water Resources
Engineering
Bulk liquid membrane
Chromium(VI)
Methyl trioctylammonium bromide
Flow system
AQUEOUS-SOLUTIONS
HEXAVALENT CHROMIUM
CR(VI) REMOVAL
ION-EXCHANGE
ADSORPTION
EXTRACTION
WASTEWATERS
TRANSPORT
RECOVERY
OPTIMIZATION
Issue Date: 1-Jun-2017
Publisher: ELSEVIER SCIENCE BV
Citation: Han, Aijuan, Zhang, Hongwei, Sun, Jiulong, Chuah, Gaik-Khuan, Jaenicke, Stephan (2017-06-01). Investigation into bulk liquid membranes for removal of chromium(VI) from simulated wastewater. JOURNAL OF WATER PROCESS ENGINEERING 17 : 63-69. ScholarBank@NUS Repository. https://doi.org/10.1016/j.jwpe.2017.01.011
Abstract: © 2017 Elsevier Ltd Hexavalent chromium, Cr(VI), is highly toxic and harmful to living organisms due to its carcinogenic and mutagenic properties. Liquid membranes combine the processes of extraction and stripping in a single unit operation, and therefore have much potential in the context of process intensification. The liquid membrane separates two aqueous phases and normally contains carrier molecules to assist in the selective trans-membrane transport of the solute. Of the various quaternary ammonium salts investigated as Cr(VI) carriers, methyl trioctyl ammonium bromide showed the best performance. A mixture of o-xylene and sunflower oil was chosen as the liquid membrane. o-Xylene has a high boiling point, low solubility in water and relatively high polarity which supports the dissociation of methyl trioctyl ammonium bromide. The addition of sunflower oil improves the retention of the carrier in the organic phase. After passing through the liquid membrane, Cr(VI) was reduced to Cr(III) by acidified iron(II) sulfate. The process was demonstrated with a continuously operating flow system with online monitoring via a dip-in photometer. With a Cr(VI) feed concentration of 1.6 mmol/L, the removal efficiency was sustained at >98% over 4 h. The high removal efficiency can be maintained by replacing the liquid membrane at periodic intervals.
Source Title: JOURNAL OF WATER PROCESS ENGINEERING
URI: https://scholarbank.nus.edu.sg/handle/10635/155384
ISSN: 2214-7144
DOI: 10.1016/j.jwpe.2017.01.011
Appears in Collections:Staff Publications
Elements

Show full item record
Files in This Item:
File Description SizeFormatAccess SettingsVersion 
1-s2.0-S2214714416304093-main.pdfPublished version1.12 MBAdobe PDF

OPEN

NoneView/Download

SCOPUSTM   
Citations

8
checked on Oct 15, 2019

WEB OF SCIENCETM
Citations

5
checked on Jul 16, 2019

Page view(s)

39
checked on Oct 17, 2019

Download(s)

1
checked on Oct 17, 2019

Google ScholarTM

Check

Altmetric


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.