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Characterization of lead sorption by the natural and Fe(III)-modified zeolite

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2013
Authors
Kragovic, Milan
Dakovic, Aleksandra
Marković, Marija
Krstić, Jugoslav
Gatta, G. Diego
Rotiroti, Nicola
Article (Published version)
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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-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 zeolite
Source:
Applied Surface Science, 2013, 283, 764-774
Publisher:
  • 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
[ Google Scholar ]
108
91
URI
https://cer.ihtm.bg.ac.rs/handle/123456789/1209
Collections
  • Radovi istraživača / Researchers' publications
Institution/Community
IHTM
TY  - 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 . .

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