Aging of Oxyhydroxide Sorbents Saturated with the Cations of Nonferrous Metals
SOPHIA I. PECHENYUK, VASILIY V. SEMUSHIN and TATIANA G. KASHULINA
Tananaev Institute of Chemistry and Technology of Rare Elements and Mineral Sources,
Kola Scientific Centre of the Russian Academy of Sciences, Ul. Fersmana 26a, Murmanskaya obl.,
Apatity 184209 (Russia) E-mail: pechenyuk@chemy.kolasc.net.ru
Pages: 627-633
Abstract
The aging of freshly precipitated and immediately saturated with a sorbate (Cu(II), Ni(II), Cr(III), Pb(II) and Cd(II) cations) oxyhydroxides of Fe(III), Cr(III), Al(III), Zr(III) and Ti(IV) in 0.25 M solution of NaCl at room temperature is studied. It is established that the aging is accompanied by spontaneous acidification of the oxyhydroxide suspension and by partial desorption of the sorbate, which is to the highest extent exhibited with aluminium oxyhydroxide with Cd sorbed, and by the lowest extent with
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