Abstract
Removal of Se(VI) from an aqueous solution under different conditions was investigated using Bayer electrofilter fines (BEFs), a waste from alumina production, as an adsorbent. Adsorption selenate was studied using batch adsorption experiments as a function of pH (2–12), contact time (0.08–30 h), adsorbent concentration (4–80 g/L), initial selenium concentration (5–203 mg/L), and ionic strength (0–0.1 M NaCl). The results showed that adsorption was significantly affected by pH Se(VI) having the highest affinity for BEFs at pH 3. Sorption Se(VI) reached equilibrium in 4 h. Increasing ionic strength decreased selenate sorption. The adsorption of Se(VI) onto BEFs was found to fit the Langmuir isotherm. Maximum selenium uptake values were calculated as 2.3613 mg/g and 1.5608 mg/g when using adsorbent concentrations of 20 g/L and 40 g/L, respectively.
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Ayala, J., Fernández, B. Bayer Electrofilter Fines as Potential Se(VI) Adsorbents. JOM 67, 2727–2732 (2015). https://doi.org/10.1007/s11837-015-1616-0
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DOI: https://doi.org/10.1007/s11837-015-1616-0