Aqueous Pb sorption by synthetic and natural apatite: Kinetics, equilibrium and thermodynamic studies
Само за регистроване кориснике
2010
Чланак у часопису (Објављена верзија)
Метаподаци
Приказ свих података о документуАпстракт
Natural apatites represent a cost effective soil amendment, which can be used for in situ reduction of lead bioavailability and mobility. In our previous work, we selected Lisina apatite (LA) as a promising natural mineral for lead immobilization based on theoretical predictions. This study investigated the adsorption equilibrium and kinetics of aqueous Pb sorption onto Lisina apatite and synthetic hydroxyapatite (HAP) at different temperatures. XRD analysis indicated that LA consists of three minerals: fluorapatite, quartz and muscovite. After reaction with a Pb solution, only FA peaks were changed, confirming that fluorapatite present in LA is responsible for Pb sorption. Sorption experiments confirmed that both LA and HAP are effective in Pb removal. Langmuir, Freundlich, Temkin, Koble-Corrigan and Redlich-Peterson isotherm models were applied to experimental data. The kinetics of the sorption process on both minerals was well characterized by the pseudo-second order reaction rate. ...Results indicate that Pb immobilization by HAP is a two-step process: the first rapid phase, possibly surface complexation and secondary dissolution of HAP and precipitation of pyromorphite. The sorption of Pb by Lisina apatite is also a two-step process, but the reaction mechanisms are more complicated and need further research as the results indicate that different mechanisms dominate at different temperatures. The values of thermodynamic equilibrium constants and Gibbs free energy were also calculated. The values of AG obtained confirm the feasibility of both HAP and LA as effective sorbents of the Pb ion.
Кључне речи:
Hydroxyapatite / Natural apatite / Lead / Sorption kinetics / MechanismИзвор:
Chemical Engineering Journal, 2010, 160, 2, 503-510Издавач:
- Elsevier Science Sa, Lausanne
Финансирање / пројекти:
- Истраживање феномена преноса значајних за развој вишефазних процеса и опреме (RS-142014)
- Истраживање хемијских и физичких феномена у обради радиоактивног и опасног отпада (RS-142050)
DOI: 10.1016/j.cej.2010.03.061
ISSN: 1385-8947
WoS: 000279137900015
Scopus: 2-s2.0-77954819475
Институција/група
Tehnološko-metalurški fakultetTY - JOUR AU - Kaluđerović-Radoičić, Tatjana AU - Raičević, Slavica PY - 2010 UR - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/1619 AB - Natural apatites represent a cost effective soil amendment, which can be used for in situ reduction of lead bioavailability and mobility. In our previous work, we selected Lisina apatite (LA) as a promising natural mineral for lead immobilization based on theoretical predictions. This study investigated the adsorption equilibrium and kinetics of aqueous Pb sorption onto Lisina apatite and synthetic hydroxyapatite (HAP) at different temperatures. XRD analysis indicated that LA consists of three minerals: fluorapatite, quartz and muscovite. After reaction with a Pb solution, only FA peaks were changed, confirming that fluorapatite present in LA is responsible for Pb sorption. Sorption experiments confirmed that both LA and HAP are effective in Pb removal. Langmuir, Freundlich, Temkin, Koble-Corrigan and Redlich-Peterson isotherm models were applied to experimental data. The kinetics of the sorption process on both minerals was well characterized by the pseudo-second order reaction rate. Results indicate that Pb immobilization by HAP is a two-step process: the first rapid phase, possibly surface complexation and secondary dissolution of HAP and precipitation of pyromorphite. The sorption of Pb by Lisina apatite is also a two-step process, but the reaction mechanisms are more complicated and need further research as the results indicate that different mechanisms dominate at different temperatures. The values of thermodynamic equilibrium constants and Gibbs free energy were also calculated. The values of AG obtained confirm the feasibility of both HAP and LA as effective sorbents of the Pb ion. PB - Elsevier Science Sa, Lausanne T2 - Chemical Engineering Journal T1 - Aqueous Pb sorption by synthetic and natural apatite: Kinetics, equilibrium and thermodynamic studies EP - 510 IS - 2 SP - 503 VL - 160 DO - 10.1016/j.cej.2010.03.061 ER -
@article{ author = "Kaluđerović-Radoičić, Tatjana and Raičević, Slavica", year = "2010", abstract = "Natural apatites represent a cost effective soil amendment, which can be used for in situ reduction of lead bioavailability and mobility. In our previous work, we selected Lisina apatite (LA) as a promising natural mineral for lead immobilization based on theoretical predictions. This study investigated the adsorption equilibrium and kinetics of aqueous Pb sorption onto Lisina apatite and synthetic hydroxyapatite (HAP) at different temperatures. XRD analysis indicated that LA consists of three minerals: fluorapatite, quartz and muscovite. After reaction with a Pb solution, only FA peaks were changed, confirming that fluorapatite present in LA is responsible for Pb sorption. Sorption experiments confirmed that both LA and HAP are effective in Pb removal. Langmuir, Freundlich, Temkin, Koble-Corrigan and Redlich-Peterson isotherm models were applied to experimental data. The kinetics of the sorption process on both minerals was well characterized by the pseudo-second order reaction rate. Results indicate that Pb immobilization by HAP is a two-step process: the first rapid phase, possibly surface complexation and secondary dissolution of HAP and precipitation of pyromorphite. The sorption of Pb by Lisina apatite is also a two-step process, but the reaction mechanisms are more complicated and need further research as the results indicate that different mechanisms dominate at different temperatures. The values of thermodynamic equilibrium constants and Gibbs free energy were also calculated. The values of AG obtained confirm the feasibility of both HAP and LA as effective sorbents of the Pb ion.", publisher = "Elsevier Science Sa, Lausanne", journal = "Chemical Engineering Journal", title = "Aqueous Pb sorption by synthetic and natural apatite: Kinetics, equilibrium and thermodynamic studies", pages = "510-503", number = "2", volume = "160", doi = "10.1016/j.cej.2010.03.061" }
Kaluđerović-Radoičić, T.,& Raičević, S.. (2010). Aqueous Pb sorption by synthetic and natural apatite: Kinetics, equilibrium and thermodynamic studies. in Chemical Engineering Journal Elsevier Science Sa, Lausanne., 160(2), 503-510. https://doi.org/10.1016/j.cej.2010.03.061
Kaluđerović-Radoičić T, Raičević S. Aqueous Pb sorption by synthetic and natural apatite: Kinetics, equilibrium and thermodynamic studies. in Chemical Engineering Journal. 2010;160(2):503-510. doi:10.1016/j.cej.2010.03.061 .
Kaluđerović-Radoičić, Tatjana, Raičević, Slavica, "Aqueous Pb sorption by synthetic and natural apatite: Kinetics, equilibrium and thermodynamic studies" in Chemical Engineering Journal, 160, no. 2 (2010):503-510, https://doi.org/10.1016/j.cej.2010.03.061 . .