Please use this identifier to cite or link to this item:
Title: Development of a multifunctional membrane for chromatic warning and enhanced adsorptive removal of heavy metal ions: Application to cadmium
Authors: Zhang, L.
Zhao, Y.-H. 
Bai, R. 
Keywords: Adsorptive removal
ATRP method
Heavy metal ions
Membrane functionalization
Optical sensor
Visual warning
Issue Date: 1-Sep-2011
Citation: Zhang, L., Zhao, Y.-H., Bai, R. (2011-09-01). Development of a multifunctional membrane for chromatic warning and enhanced adsorptive removal of heavy metal ions: Application to cadmium. Journal of Membrane Science 379 (1-2) : 69-79. ScholarBank@NUS Repository.
Abstract: In this study, a multifunctional membrane for visual warning and enhanced adsorptive removal of cadmium ions in aqueous solutions was prepared and examined. 5,10,15,20-Tetrakis (1-methyl-4-pyridinio) porphyrin tetra (p-toluenesulfonate), an optical indicator ligand for cadmium ions, was immobilized onto a porous chitosan/cellulose acetate blend base membrane through the polymer brushes grafted on the membrane surface via a surface-initiated atom transfer radical polymerization (ATRP) method. The prepared membrane was found to be capable of displaying distinctive color changes in response to the presence of cadmium ions in aqueous solutions. In addition, it also showed significantly enhanced performance for adsorptive removal of cadmium ions. Experimental results indicated that the developed membrane can exhibit quick (within 2min) color change (from yellow to green) when it was in contact with cadmium ions in a solution even at relatively low concentrations (e.g. 5mg/L). The interference study revealed that the functionalized membrane also possessed selectivity towards cadmium ions when other cationic species such as K+, Na+, Ca2+ and Mg2+ ions existed together in the solutions. Hence, the development in this study demonstrated the prospect to make porous membranes truly multifunctional with added advantages for adsorptive removal as well as for chromatic warning of heavy metal ions in the solutions that are treated. © 2011 Elsevier B.V.
Source Title: Journal of Membrane Science
ISSN: 03767388
DOI: 10.1016/j.memsci.2011.05.044
Appears in Collections:Staff Publications

Show full item record
Files in This Item:
There are no files associated with this item.


checked on Oct 13, 2021


checked on Oct 13, 2021

Page view(s)

checked on Oct 14, 2021

Google ScholarTM



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