Preconcentration of Cu (II) from seawater using a novel and stable phenol-formaldehyde resin

Preconcentration of Cu (II) from seawater using a novel phenol-formaldehyde (P-F) resin was investigated. 1,2-dihydroxybenzene-4-azo-3-hydroxybenzene-formaldehyde resin (DAHBF) was prepared by condensing 1,2-dihydroxybenzene-4-azo-3-hydroxybenzene with formaldehyde (1:2 mole ratio) in the presence o...

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Bibliographic Details
Published in:Water science and technology 2010-01, Vol.61 (7), p.1853-1863
Main Authors: Manivannan, D, Starvin, Maria, Biju, V M
Format: Article
Language:English
Subjects:
Adsorption
Chemical analysis
Coordination compounds
Copper
Copper - chemistry
Degree of crystallinity
Formaldehyde
Formaldehyde - chemistry
Hydrogen-Ion Concentration
Infrared spectroscopy
Ions
Marine
Metal complexes
Metal concentrations
Metal ions
Metals
Molecular Structure
Oxalic acid
Oxygen atoms
Phenol formaldehyde resins
Phenols
Phenols - chemistry
Polymers
Polymers - chemistry
Seawater
Seawater - chemistry
Thermal analysis
Thermal stability
Water analysis
Water Pollutants, Chemical - chemistry
Water Purification - methods
Water sampling
X-ray diffraction
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Summary:Preconcentration of Cu (II) from seawater using a novel phenol-formaldehyde (P-F) resin was investigated. 1,2-dihydroxybenzene-4-azo-3-hydroxybenzene-formaldehyde resin (DAHBF) was prepared by condensing 1,2-dihydroxybenzene-4-azo-3-hydroxybenzene with formaldehyde (1:2 mole ratio) in the presence of oxalic acid as catalyst. Polychelates were obtained when the DAHBF was treated with the aqueous solution of Cu (II) ions. The polymeric resin and polymer-metal complexes were characterized with thermal analysis and spectral studies. The IR spectra of polychelates suggest that the metal was coordinated through the oxygen atoms of the dihydroxybenzene moiety. The TGA data revealed the thermal stability of the resin and the polychelates. X-ray diffraction study revealed the incorporation of the metal ion significantly enhanced the degree of crystallinity. The sorption properties of the chelate forming resin towards divalent metal ion [Cu(II)] was studied as a function of pH, preconcentration time, metal concentration, amount of resin, aqueous phase volume and presence of electrolyte. This procedure was validated for recovery of copper from seawater samples. The method has adequate accuracy and it can be used for determination of copper in sea water samples.
ISSN:0273-1223
1996-9732
DOI:10.2166/wst.2010.850