Removal of Co2+ ions from aqueous solutions using iron-functionalized sepiolite
Samo za registrovane korisnike
2012
Autori
Lazarević, SlavicaJanković-Častvan, Ivona
Potkonjak, Branislav
Janaćković, Đorđe
Petrović, Rada
Članak u časopisu (Objavljena verzija)
Metapodaci
Prikaz svih podataka o dokumentuApstrakt
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.
Ključne reči:
Iron-functionalized sepiolite / Sorption / Cobalt / Kinetics / Ionization constantsIzvor:
Chemical Engineering and Processing-Process Intensification, 2012, 55, 40-47Izdavač:
- Elsevier Science Sa, Lausanne
Finansiranje / projekti:
- Sinteza, razvoj tehnologija dobijanja i primena nanostrukturnih multifunkcionalnih materijala definisanih svojstava (RS-45019)
- EUREKA E!4141
DOI: 10.1016/j.cep.2012.01.004
ISSN: 0255-2701
WoS: 000303964600006
Scopus: 2-s2.0-84859509608
Institucija/grupa
Tehnološko-metalurški fakultetTY - 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 . .