The efficiency of iron-functionalized sepiolite for the removal of Co2+ ions from aqueous solutions was determined under different experimental conditions, using the batch method. The ionization constants of the surface functional groups of the sepiolite-iron system, determined from potentiometric titration data, were pK(a1)(int) = 6.7 +/- 0.1 and pK(a2)(int) = 10.2 +/- 0.1. The sorption experiments were performed as a function of initial metal concentration, initial pH value, and the equilibration time. The equilibrium process was well described by the Langmuir isotherm model. The pseudo-second order kinetic model provides the best correlation of the experimental kinetic data. The iron-sepiolite system had a noticeably higher Co2+ sorption capacity than the natural sepiolite sample as a result of higher specific sorption and a higher ion exchange capacity.
TY - JOUR
AU - Lazarević, Slavica
AU - Janković-Častvan, Ivona
AU - Potkonjak, Branislav
AU - Janaćković, Đorđe
AU - Petrović, Rada
PY - 2012
UR - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2237
AB - The efficiency of iron-functionalized sepiolite for the removal of Co2+ ions from aqueous solutions was determined under different experimental conditions, using the batch method. The ionization constants of the surface functional groups of the sepiolite-iron system, determined from potentiometric titration data, were pK(a1)(int) = 6.7 +/- 0.1 and pK(a2)(int) = 10.2 +/- 0.1. The sorption experiments were performed as a function of initial metal concentration, initial pH value, and the equilibration time. The equilibrium process was well described by the Langmuir isotherm model. The pseudo-second order kinetic model provides the best correlation of the experimental kinetic data. The iron-sepiolite system had a noticeably higher Co2+ sorption capacity than the natural sepiolite sample as a result of higher specific sorption and a higher ion exchange capacity.
PB - Elsevier Science Sa, Lausanne
T2 - Chemical Engineering and Processing-Process Intensification
T1 - Removal of Co2+ ions from aqueous solutions using iron-functionalized sepiolite
EP - 47
SP - 40
VL - 55
DO - 10.1016/j.cep.2012.01.004
ER -
@article{
author = "Lazarević, Slavica and Janković-Častvan, Ivona and Potkonjak, Branislav and Janaćković, Đorđe and Petrović, Rada",
year = "2012",
abstract = "The efficiency of iron-functionalized sepiolite for the removal of Co2+ ions from aqueous solutions was determined under different experimental conditions, using the batch method. The ionization constants of the surface functional groups of the sepiolite-iron system, determined from potentiometric titration data, were pK(a1)(int) = 6.7 +/- 0.1 and pK(a2)(int) = 10.2 +/- 0.1. The sorption experiments were performed as a function of initial metal concentration, initial pH value, and the equilibration time. The equilibrium process was well described by the Langmuir isotherm model. The pseudo-second order kinetic model provides the best correlation of the experimental kinetic data. The iron-sepiolite system had a noticeably higher Co2+ sorption capacity than the natural sepiolite sample as a result of higher specific sorption and a higher ion exchange capacity.",
publisher = "Elsevier Science Sa, Lausanne",
journal = "Chemical Engineering and Processing-Process Intensification",
title = "Removal of Co2+ ions from aqueous solutions using iron-functionalized sepiolite",
pages = "47-40",
volume = "55",
doi = "10.1016/j.cep.2012.01.004"
}
Lazarević, S., Janković-Častvan, I., Potkonjak, B., Janaćković, Đ.,& Petrović, R.. (2012). Removal of Co2+ ions from aqueous solutions using iron-functionalized sepiolite. in Chemical Engineering and Processing-Process Intensification
Elsevier Science Sa, Lausanne., 55, 40-47.
https://doi.org/10.1016/j.cep.2012.01.004
Lazarević S, Janković-Častvan I, Potkonjak B, Janaćković Đ, Petrović R. Removal of Co2+ ions from aqueous solutions using iron-functionalized sepiolite. in Chemical Engineering and Processing-Process Intensification. 2012;55:40-47.
doi:10.1016/j.cep.2012.01.004 .
Lazarević, Slavica, Janković-Častvan, Ivona, Potkonjak, Branislav, Janaćković, Đorđe, Petrović, Rada, "Removal of Co2+ ions from aqueous solutions using iron-functionalized sepiolite" in Chemical Engineering and Processing-Process Intensification, 55 (2012):40-47,
https://doi.org/10.1016/j.cep.2012.01.004 . .
