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10.
A new chelating resin functionalized with 2-methyl
mercapto-1-imidazolylazo benzene: synthesis, characterization and
application in the determination of trace copper and cadmium
S.
Pramanik1*, S. Sarkar2, S. Dey3, P.
Chattopadhyay3
1Hooghly
Women’s College, Pipulpati, Hooghly-712103, India
2Department of Applied Science and Humanities, Durgapur
Institute of Advanced Technology and Management, Rajbandh, Durgaur-12,
India
3Department of Chemistry, The University of Burdwan,
Burdwan- 713 104, India, E-mail:
hwclec@rediffmail.com
Abstract:
New chelating resin was synthesized by incorporating
2-methylmercapto-1-imidazolylazo benzene into Merrifield polymer
through C-N covalent bond and characterized by elemental
analysis, infrared spectra, thermogravimetric analysis and
hydrogen ion capacity. The resin exhibits no affinity to alkali
or alkaline earth metal ions and also other ions. The sorption
capacity of the newly formed resin towards the cations Cu(II),
Cd(II), Ni(II) and Zn(II) as a function of pH was studied. In
column operation it has been observed that the trace quantities
of Cu(II) and Cd(II) can be removed from water samples at pH
6.0 and at pH 5.0 respectively. The concentration of Cd(II) in
waste water sample was determined by isotope dilution method
using 115Cd as radioisotope and Cu(II) content was
determined by FAAS method. The procedure was validated by the
analysis of certified standard alloy by atomic absorption
spectroscopy (AAS) with satisfactory results.
The detection limits based on 3s criterion
were found to be 0.04
mgL-1 for Cu(II) and 0.06 mgL-1 for Cd(II).
Keywords: Chelating resin, Sorption capacity, Copper, Cadmium.
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