SORPTION AND SEPARATION OF Cu(II), Co(II) AND Ni(II) ON 1(4-AZOBENZYLCELLULOSE)-2-NAPHTOL
Abstract:
The mechanism of Cu(ll), Co(ll), and Ni(ll) sorption on 1(4-azobenzylcellulose)-2-naphthol has been investigated along with the possible chromatographic separation of the three elements on this chelating sorbent. The data obtained from the dependence of the distribution coefficients on pH and from isotherms, as well, have evidenced that physical sorption of the three elements is accompanied by chemical sorption, adsorption being predominant for Co(ll) and chemosorption for Ni(ll) and Cu(ll) being much more pronounced for the last element. The modifications in IR and diffuse reflectance spectra lead to the conclusion that chemical sorption involves the formation of chelates. The sorbent may be employed for the separation of Co(ll)-Ni(ll)-Cu(ll) through successive elution with 0.01 N HCl, 0.1 N HCl, and 1 N HCl.
The mechanism of Cu(ll), Co(ll), and Ni(ll) sorption on 1(4-azobenzylcellulose)-2-naphthol has been investigated along with the possible chromatographic separation of the three elements on this chelating sorbent. The data obtained from the dependence of the distribution coefficients on pH and from isotherms, as well, have evidenced that physical sorption of the three elements is accompanied by chemical sorption, adsorption being predominant for Co(ll) and chemosorption for Ni(ll) and Cu(ll) being much more pronounced for the last element. The modifications in IR and diffuse reflectance spectra lead to the conclusion that chemical sorption involves the formation of chelates. The sorbent may be employed for the separation of Co(ll)-Ni(ll)-Cu(ll) through successive elution with 0.01 N HCl, 0.1 N HCl, and 1 N HCl.
DOI: 10.48141/SBJCHEM.v5.n5.1997.79_1997.pdf
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