Characterization of lead sorption by the natural and Fe(III)-modified zeolite
Authorized Users Only
2013
Authors
Kragovic, MilanDakovic, Aleksandra
Marković, Marija
Krstić, Jugoslav

Gatta, G. Diego

Rotiroti, Nicola
Article (Published version)

Metadata
Show full item recordAbstract
The influence of contact time, temperature and particle size on lead sorption by the natural and Fe(III)-modified zeolites was investigated. Characterization of the natural and Fe(III)-modified zeolite before and after lead sorption was performed by determination of textural properties, by scanning electron microscopy and X-ray spectroscopy in energy-dispersive mode (SEM-EDS), transmission electron microscopy (TEM) and X-ray powder diffraction (XRPD) analysis. Lead sorption kinetics at 303-333 K, best represented by the pseudo-second order model and activation energy (13.5 and 8.5 kJ/mol for the natural and Fe(III)-modified zeolite respectively) confirmed an activated chemical sorption. Desorption experiments indicated that lead was irreversibly sorbed on both zeolites. XRPD, TEM and SEM results showed that modification of the natural zeolite with Fe(III) ions did not change its crystal structure and iron is mainly located at the zeolite surface, likely in form of amorphous iron oxy-hy...droxides. Specific surface area significantly increases after modification of the natural zeolite with Fe(III) ions (from 30.2 for the natural to 52.5 m(2)/g for Fe(III)-modified zeolite). Characterization of both lead saturated sorbents suggested that besides ion exchange, lead is both chemisorbed and precipitated at their surfaces, and presence of amorphous iron in Fe(III)-modified zeolite favors sorption of lead.
Keywords:
Sorption / Desorption / Lead / Natural zeolite / Fe(III)-modified zeoliteSource:
Applied Surface Science, 2013, 283, 764-774Publisher:
- Elsevier
Funding / projects:
- Oxide-based environmentally-friendly porous materials for genotoxic substances removal (RS-172018)
- Development of technological processes for obtaining of ecological materials based on nonmetallic minerals (RS-34013)
DOI: 10.1016/j.apsusc.2013.07.016
ISSN: 0169-4332
WoS: 000323601700109
Scopus: 2-s2.0-84883192577
Collections
Institution/Community
IHTMTY - JOUR AU - Kragovic, Milan AU - Dakovic, Aleksandra AU - Marković, Marija AU - Krstić, Jugoslav AU - Gatta, G. Diego AU - Rotiroti, Nicola PY - 2013 UR - https://cer.ihtm.bg.ac.rs/handle/123456789/1209 AB - The influence of contact time, temperature and particle size on lead sorption by the natural and Fe(III)-modified zeolites was investigated. Characterization of the natural and Fe(III)-modified zeolite before and after lead sorption was performed by determination of textural properties, by scanning electron microscopy and X-ray spectroscopy in energy-dispersive mode (SEM-EDS), transmission electron microscopy (TEM) and X-ray powder diffraction (XRPD) analysis. Lead sorption kinetics at 303-333 K, best represented by the pseudo-second order model and activation energy (13.5 and 8.5 kJ/mol for the natural and Fe(III)-modified zeolite respectively) confirmed an activated chemical sorption. Desorption experiments indicated that lead was irreversibly sorbed on both zeolites. XRPD, TEM and SEM results showed that modification of the natural zeolite with Fe(III) ions did not change its crystal structure and iron is mainly located at the zeolite surface, likely in form of amorphous iron oxy-hydroxides. Specific surface area significantly increases after modification of the natural zeolite with Fe(III) ions (from 30.2 for the natural to 52.5 m(2)/g for Fe(III)-modified zeolite). Characterization of both lead saturated sorbents suggested that besides ion exchange, lead is both chemisorbed and precipitated at their surfaces, and presence of amorphous iron in Fe(III)-modified zeolite favors sorption of lead. PB - Elsevier T2 - Applied Surface Science T1 - Characterization of lead sorption by the natural and Fe(III)-modified zeolite VL - 283 SP - 764 EP - 774 DO - 10.1016/j.apsusc.2013.07.016 ER -
@article{ author = "Kragovic, Milan and Dakovic, Aleksandra and Marković, Marija and Krstić, Jugoslav and Gatta, G. Diego and Rotiroti, Nicola", year = "2013", abstract = "The influence of contact time, temperature and particle size on lead sorption by the natural and Fe(III)-modified zeolites was investigated. Characterization of the natural and Fe(III)-modified zeolite before and after lead sorption was performed by determination of textural properties, by scanning electron microscopy and X-ray spectroscopy in energy-dispersive mode (SEM-EDS), transmission electron microscopy (TEM) and X-ray powder diffraction (XRPD) analysis. Lead sorption kinetics at 303-333 K, best represented by the pseudo-second order model and activation energy (13.5 and 8.5 kJ/mol for the natural and Fe(III)-modified zeolite respectively) confirmed an activated chemical sorption. Desorption experiments indicated that lead was irreversibly sorbed on both zeolites. XRPD, TEM and SEM results showed that modification of the natural zeolite with Fe(III) ions did not change its crystal structure and iron is mainly located at the zeolite surface, likely in form of amorphous iron oxy-hydroxides. Specific surface area significantly increases after modification of the natural zeolite with Fe(III) ions (from 30.2 for the natural to 52.5 m(2)/g for Fe(III)-modified zeolite). Characterization of both lead saturated sorbents suggested that besides ion exchange, lead is both chemisorbed and precipitated at their surfaces, and presence of amorphous iron in Fe(III)-modified zeolite favors sorption of lead.", publisher = "Elsevier", journal = "Applied Surface Science", title = "Characterization of lead sorption by the natural and Fe(III)-modified zeolite", volume = "283", pages = "764-774", doi = "10.1016/j.apsusc.2013.07.016" }
Kragovic, M., Dakovic, A., Marković, M., Krstić, J., Gatta, G. D.,& Rotiroti, N.. (2013). Characterization of lead sorption by the natural and Fe(III)-modified zeolite. in Applied Surface Science Elsevier., 283, 764-774. https://doi.org/10.1016/j.apsusc.2013.07.016
Kragovic M, Dakovic A, Marković M, Krstić J, Gatta GD, Rotiroti N. Characterization of lead sorption by the natural and Fe(III)-modified zeolite. in Applied Surface Science. 2013;283:764-774. doi:10.1016/j.apsusc.2013.07.016 .
Kragovic, Milan, Dakovic, Aleksandra, Marković, Marija, Krstić, Jugoslav, Gatta, G. Diego, Rotiroti, Nicola, "Characterization of lead sorption by the natural and Fe(III)-modified zeolite" in Applied Surface Science, 283 (2013):764-774, https://doi.org/10.1016/j.apsusc.2013.07.016 . .