Sorption of Cu2+ and Co2+ from aqueous solutions onto sepiolite: An equilibrium, kinetic and thermodynamic study
Sorpcija jona bakra i kobalta iz vodenih rastvora na sepiolitu, ispitivanje ravnoteže, kinetike i termodinamike sorpcije
Аутори
Lazarević, SlavicaJanković-Častvan, Ivona
Radovanović, Željko
Potkonjak, Branislav
Janaćković, Đorđe
Petrović, Rada
Чланак у часопису (Објављена верзија)
Метаподаци
Приказ свих података о документуАпстракт
The efficiency of natural sepiolite for the removal of Cu2+ and Co2+ from aqueous solution was determined using the batch method. The sorption experiments were performed as a function of the initial metal concentration, the equilibration time and temperature. Thermodynamic parameters, such as enthalpy, free energy and entropy, were calculated from the temperature dependent sorption isotherms and these values showed that the sorption of the investigated metals onto sepiolite was endothermic. The pseudo-second order kinetic model provides the best correlation of the experimental kinetic data.
U radu je ispitana efikasnost uklanjanja jona bakra i kobalta iz vodenih rastvora na prirodnom sepiolitu primenom metode uravnotežavanja posebnih proba. Ispitan je uticaj početnih koncentracija Cu2+ i Co2+, kao i vremena uravnotežavanja i temperature na proces sorpcije. Vrednosti termodinamičkih parametara sorpcije (promene entalpije, promene entropije, promene slobodne energije sorpcije), određene na osnovu zavisnosti sorpcionog kapaciteta od temperature, ukazuju na to da je proces sorpcije Cu2+ i Co2+ na sepiolitu endoterman. Poređenjem eksperimentalih rezultata sa kinetičkim modelima utvrđeno je da se kinetika sorpcije Cu2+ i Co2+ na sepiolitu može opisati kinetičkim modelom pseudo-drugog reda.
Кључне речи:
sepiolite / sorption / heavy metals / kinetics / thermodynamicИзвор:
Journal of the Serbian Chemical Society, 2011, 76, 1, 101-112Издавач:
- Serbian Chemical Society, Belgrade
Финансирање / пројекти:
- Синтеза, развој технологија добијања и примена наноструктурних мултифункционалних материјала дефинисаних својстава (RS-MESTD-Integrated and Interdisciplinary Research (IIR or III)-45019)
- EUREKA E!4141
Колекције
Институција/група
Tehnološko-metalurški fakultetTY - JOUR AU - Lazarević, Slavica AU - Janković-Častvan, Ivona AU - Radovanović, Željko AU - Potkonjak, Branislav AU - Janaćković, Đorđe AU - Petrović, Rada PY - 2011 UR - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/1805 AB - The efficiency of natural sepiolite for the removal of Cu2+ and Co2+ from aqueous solution was determined using the batch method. The sorption experiments were performed as a function of the initial metal concentration, the equilibration time and temperature. Thermodynamic parameters, such as enthalpy, free energy and entropy, were calculated from the temperature dependent sorption isotherms and these values showed that the sorption of the investigated metals onto sepiolite was endothermic. The pseudo-second order kinetic model provides the best correlation of the experimental kinetic data. AB - U radu je ispitana efikasnost uklanjanja jona bakra i kobalta iz vodenih rastvora na prirodnom sepiolitu primenom metode uravnotežavanja posebnih proba. Ispitan je uticaj početnih koncentracija Cu2+ i Co2+, kao i vremena uravnotežavanja i temperature na proces sorpcije. Vrednosti termodinamičkih parametara sorpcije (promene entalpije, promene entropije, promene slobodne energije sorpcije), određene na osnovu zavisnosti sorpcionog kapaciteta od temperature, ukazuju na to da je proces sorpcije Cu2+ i Co2+ na sepiolitu endoterman. Poređenjem eksperimentalih rezultata sa kinetičkim modelima utvrđeno je da se kinetika sorpcije Cu2+ i Co2+ na sepiolitu može opisati kinetičkim modelom pseudo-drugog reda. PB - Serbian Chemical Society, Belgrade T2 - Journal of the Serbian Chemical Society T1 - Sorption of Cu2+ and Co2+ from aqueous solutions onto sepiolite: An equilibrium, kinetic and thermodynamic study T1 - Sorpcija jona bakra i kobalta iz vodenih rastvora na sepiolitu, ispitivanje ravnoteže, kinetike i termodinamike sorpcije EP - 112 IS - 1 SP - 101 VL - 76 UR - https://hdl.handle.net/21.15107/rcub_technorep_1805 ER -
@article{ author = "Lazarević, Slavica and Janković-Častvan, Ivona and Radovanović, Željko and Potkonjak, Branislav and Janaćković, Đorđe and Petrović, Rada", year = "2011", abstract = "The efficiency of natural sepiolite for the removal of Cu2+ and Co2+ from aqueous solution was determined using the batch method. The sorption experiments were performed as a function of the initial metal concentration, the equilibration time and temperature. Thermodynamic parameters, such as enthalpy, free energy and entropy, were calculated from the temperature dependent sorption isotherms and these values showed that the sorption of the investigated metals onto sepiolite was endothermic. The pseudo-second order kinetic model provides the best correlation of the experimental kinetic data., U radu je ispitana efikasnost uklanjanja jona bakra i kobalta iz vodenih rastvora na prirodnom sepiolitu primenom metode uravnotežavanja posebnih proba. Ispitan je uticaj početnih koncentracija Cu2+ i Co2+, kao i vremena uravnotežavanja i temperature na proces sorpcije. Vrednosti termodinamičkih parametara sorpcije (promene entalpije, promene entropije, promene slobodne energije sorpcije), određene na osnovu zavisnosti sorpcionog kapaciteta od temperature, ukazuju na to da je proces sorpcije Cu2+ i Co2+ na sepiolitu endoterman. Poređenjem eksperimentalih rezultata sa kinetičkim modelima utvrđeno je da se kinetika sorpcije Cu2+ i Co2+ na sepiolitu može opisati kinetičkim modelom pseudo-drugog reda.", publisher = "Serbian Chemical Society, Belgrade", journal = "Journal of the Serbian Chemical Society", title = "Sorption of Cu2+ and Co2+ from aqueous solutions onto sepiolite: An equilibrium, kinetic and thermodynamic study, Sorpcija jona bakra i kobalta iz vodenih rastvora na sepiolitu, ispitivanje ravnoteže, kinetike i termodinamike sorpcije", pages = "112-101", number = "1", volume = "76", url = "https://hdl.handle.net/21.15107/rcub_technorep_1805" }
Lazarević, S., Janković-Častvan, I., Radovanović, Ž., Potkonjak, B., Janaćković, Đ.,& Petrović, R.. (2011). Sorption of Cu2+ and Co2+ from aqueous solutions onto sepiolite: An equilibrium, kinetic and thermodynamic study. in Journal of the Serbian Chemical Society Serbian Chemical Society, Belgrade., 76(1), 101-112. https://hdl.handle.net/21.15107/rcub_technorep_1805
Lazarević S, Janković-Častvan I, Radovanović Ž, Potkonjak B, Janaćković Đ, Petrović R. Sorption of Cu2+ and Co2+ from aqueous solutions onto sepiolite: An equilibrium, kinetic and thermodynamic study. in Journal of the Serbian Chemical Society. 2011;76(1):101-112. https://hdl.handle.net/21.15107/rcub_technorep_1805 .
Lazarević, Slavica, Janković-Častvan, Ivona, Radovanović, Željko, Potkonjak, Branislav, Janaćković, Đorđe, Petrović, Rada, "Sorption of Cu2+ and Co2+ from aqueous solutions onto sepiolite: An equilibrium, kinetic and thermodynamic study" in Journal of the Serbian Chemical Society, 76, no. 1 (2011):101-112, https://hdl.handle.net/21.15107/rcub_technorep_1805 .