CER - Central Repository
Institute of Chemistry, Technology and Metallurgy
    • English
    • Српски
    • Српски (Serbia)
  • English 
    • English
    • Serbian (Cyrilic)
    • Serbian (Latin)
  • Login
View Item 
  •   Central Repository
  • IHTM
  • Radovi istraživača / Researchers' publications
  • View Item
  •   Central Repository
  • IHTM
  • Radovi istraživača / Researchers' publications
  • View Item
JavaScript is disabled for your browser. Some features of this site may not work without it.

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

Authorized Users Only
2013
Authors
Kragovic, Milan
Dakovic, Aleksandra
Marković, Marija
Krstić, Jugoslav
Gatta, G. Diego
Rotiroti, Nicola
Article (Published version)
Metadata
Show full item record
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 Science Bv, Amsterdam
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 ]
84
80
URI
http://cer.ihtm.bg.ac.rs/handle/123456789/1209
Collections
  • Radovi istraživača / Researchers' publications
Institution
IHTM

DSpace software copyright © 2002-2015  DuraSpace
About CeR – Central Repository | Send Feedback

OpenAIRERCUB
 

 

All of DSpaceInstitutionsAuthorsTitlesSubjectsThis institutionAuthorsTitlesSubjects

Statistics

View Usage Statistics

DSpace software copyright © 2002-2015  DuraSpace
About CeR – Central Repository | Send Feedback

OpenAIRERCUB