Abstract
The adsorption behaviour and mechanism of As(III) and Se(IV) oxyanion uptake using a mixed inorganic adsorbent were studied. The novel adsorbent, based on Fe(III)–Mn(III) hydrous oxides and manganese(II) carbonate, was synthesised using a hydrothermal precipitation approach in the presence of urea. The
inorganic ion exchanger exhibited a high selectivity and adsorptive capacity towards As(III) (up to 47.6 mg/g) and Se(IV) (up to 29.0 mg/g), even at low equilibrium concentration. Although pH effects were typical for anionic species (i.e., the adsorption decreased upon pH increase), Se(IV) was more sensitive to
pH changes than As(III). The rates of adsorption of both oxyanions were high.
inorganic ion exchanger exhibited a high selectivity and adsorptive capacity towards As(III) (up to 47.6 mg/g) and Se(IV) (up to 29.0 mg/g), even at low equilibrium concentration. Although pH effects were typical for anionic species (i.e., the adsorption decreased upon pH increase), Se(IV) was more sensitive to
pH changes than As(III). The rates of adsorption of both oxyanions were high.
Original language | English |
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Pages (from-to) | 213-221 |
Number of pages | 9 |
Journal | Journal of Colloid and Interface Science |
Volume | 365 |
Issue number | 1 |
DOIs | |
Publication status | Published - Jan 2012 |
Keywords
- chemical engineering
- adsorption science and technology
- toxic anions
- inorganic ion exchanger
- Selenite
- Arsenite