Removal of heavy metal ions from aqueous solution by azocalix[4]arene

This study presents the preparation, characterization, and sorption properties of new chromogenic azocalix[4]arene based oligomers (1a, 2a and 3a) towards some selected heavy metal (Ag+, Hg+, Hg2+, Co2+, Ni2+, Cu2+, Cd2+ and Cr3+) cations. These compounds have been synthesized via polycondensation r...

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Bibliographic Details
Published in:Desalination and water treatment 2011-02, Vol.26 (1-3), p.72-78
Main Authors: Karakuş, Özlem Özen, Elçin, Serkan, Yilmaz, Mustafa, Deligöz, Hasalettin
Format: Article
Language:English
Subjects:
Analogs
Applied sciences
Aqueous solutions
Azocalixarene
Batch sorption
Benzene
Binding
Calixarene
Carbon dioxide
Cations
Chemical synthesis
Cobalt
Copper
Drinking water and swimming-pool water. Desalination
Exact sciences and technology
Heavy metals
Ions
Mercury
Mercury (metal)
Metal ions
Oligomer
Oligomers
Pollution
Polyamide
Polycondensation reactions
Properties
Properties (attributes)
Removal
Silver
Sorption
Water treatment
Water treatment and pollution
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Summary:This study presents the preparation, characterization, and sorption properties of new chromogenic azocalix[4]arene based oligomers (1a, 2a and 3a) towards some selected heavy metal (Ag+, Hg+, Hg2+, Co2+, Ni2+, Cu2+, Cd2+ and Cr3+) cations. These compounds have been synthesized via polycondensation reactions involving 25,27-diethylacetoxy-26,28-dihydroxy-5,17-bis(4-nitrophenylazo)calix[4]arene (1), 25,27-diethyl acetoxy-26,28-dihydroxy-5,17-bis(4-ethylphenylazo)calix[4]arene (2), or 25,27-diethyl acetoxy-26,28-dihydroxy-5,17-bis(4-bromophenylazo)calix[4]arene (3) with 1,4-bisamino methyl benzene. Two-phase sorption properties of azocalixarene oligomers (1a, 2a and 3a) towards the selected metal cations are reported. The binding properties of these oligomers towards the selected metal cations were observed to be higher than those of monomeric analogs. It is suggested that this increased binding ability arises from highly rigid azo (–N=N–) group moiety at the upper rim of calix[4]arene in the oligomeric skeleton.
ISSN:1944-3986
1944-3994
1944-3986
DOI:10.5004/dwt.2011.2112