Se(IV) sorption on TiO2: Sorption kinetics and surface complexation modeling

Kinetics of adsorption of metal ions on inorganic materials: A review

“…The adsorption rates were in the order MACl-3 N ZACl-3 N MACl-2 N ZACl-2 (experimental conditions: adsorbent 1.0 g L − 1 , Se (IV) 50.34 mg L − 1 , and temperature 298 K). Another work reporting adsorption of Se(IV) on TiO 2 also followed second order kinetics [194]. The adsorption rate coefficient varied with the concentration of Se(IV) oxy-anion and pH and it was observed that the rate coefficient decreased from 5351.0 to 14.0 g mmol − 1 h − 1 and from 3318.0 to 2556.0 g mmol − 1 h − 1 , for Si(IV) concentration of 5.90 × 10 − 6 to 5.89× 10 − 4 mol L − 1 and solution pH from 3.00 ± 0.05 to 8.00 ± 0.09, respectively (experimental conditions: adsorbent 5.0 g L − 1 , Se(IV) 5.90 × 10 − 6 to 5.89 × 10 − 4 mol L − 1 , pH 3.00 ± 0.05 to 8.00 ± 0.09, ionic strength 0.1 mol L − 1 , and temperature 296 ± 2 K).…”

Sorption of selenium(VI) onto anatase: Macroscopic and microscopic characterization

“…In addition, the significant sorption capacity of titanium dioxide towards selenium oxyanions has been observed (Saeki and Matsumoto, 1994;Gruebel et al, 1995;Sanuki et al, 1999Sanuki et al, , 2000Li and Deng, 2002;Tan et al, 2002Tan et al, , 2003aWang et al, 2004;Shi et al, 2009;Zhang et al, 2009). However, as far as we know, studies dealing with the elucidation of selenium oxyanion retention mechanisms onto titanium dioxide are still missing.…”

Efficient adsorption of Norfloxacin by Fe-MCM-41 molecular sieves: Kinetic, isotherm and thermodynamic studies

“…9 and Table 2. The data were better fitted by pseudo-second-order kinetics which further indicated the appearance of chemical adsorption [36]. Additionally, the uptaken of NFX increased from 51.81 to 116.82 mg g À1 with Fe content according to pseudo-second-order equations.…”