期刊
COLLOID JOURNAL
卷 72, 期 3, 页码 423-431出版社
MAIK NAUKA/INTERPERIODICA/SPRINGER
DOI: 10.1134/S1061933X10030178
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In the present study, the characteristics of the adsorption of phosphate on calcined layered double hydroxides (LDHs) from aqueous solution were evaluated under laboratory conditions. The anionic clays were Mg(3)pH(10)-LDH synthesized by co-precipitation and D (1)pH(10)-LDH synthesized from the dolomite. The equilibrium isotherm showed that the uptake of phosphate ion by Mg(3)pH(10)(500)-LDH was in agreement with the Langmuir and Freundlich equations; the Langmuir model gave a better fit to the experimental data than the Freundlich one. The equilibrium isotherm showed, however, that the adsorption of the phosphate on D(1)pH(10)(500)-LDH was accompanied with precipitation reac tion of the phosphate salts. A mechanism proposed for the removal of phosphate ion has been confirmed by X-ray diffraction and FT-IR spectroscopy.
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