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Fractal analysis of physical adsorption on surfaces of acid activated bentonites from Serbia

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2008
441.pdf (454.9Kb)
Authors
Rožić, Ljiljana
Novaković, Tatjana
Petrović, Srđan
Vuković, Zorica
Čupić, Željko
Article (Published version)
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Abstract
Solid surfaces are neither ideally regular, that is, morphological and energetically homogeneous, nor are they fully irregular or fractal. Instead, real solid surfaces exhibit a limited degree of organization quantified by the fractal dimension, D. Fractal analysis was applied to investigate the effect of concentrations of HCl solutions on the structural and textural properties of chemically activated bentonite from southern Serbia. Acid treatment of bentonites is applied in order to remove impurities and various exchangeable cations from bentonite clay. Important physical changes in acid-activated smectite are the increase of the specific surface area and of the average pore volume, depending on acid strength, time and temperature of a treatment. On the basis of the sorption-structure analysis, the fractal dimension of the bentonite surfaces was determined by Mahnke and Mögel method. The fractal dimension evaluated by this method was 2.11 for the AB3 and 1.94 for the AB4.5 sample. The... estimation of the values of the fractal dimension of activated bentonites was performed in the region of small pores, 0.5 nm LT rp LT 2 nm.

Keywords:
fractal analysis / adsorption isotherm / BET method / bentonite
Source:
Chemical Industry and Chemical Engineering Quarterly / CICEQ, 2008, 14, 4, 227-229
Publisher:
  • Association of the Chemical Engineers of Serbia
Funding / projects:
  • Sinteza, karakterizacija i testiranje katalitičkih svojstava specijalno dizajniranih materijala (RS-142019)

DOI: 10.2298/CICEQ0804227R

ISSN: 1451-9372

WoS: 000262278100005

Scopus: 2-s2.0-74049118079
[ Google Scholar ]
13
11
URI
https://cer.ihtm.bg.ac.rs/handle/123456789/443
Collections
  • Radovi istraživača / Researchers' publications
Institution/Community
IHTM
TY  - JOUR
AU  - Rožić, Ljiljana
AU  - Novaković, Tatjana
AU  - Petrović, Srđan
AU  - Vuković, Zorica
AU  - Čupić, Željko
PY  - 2008
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/443
AB  - Solid surfaces are neither ideally regular, that is, morphological and energetically homogeneous, nor are they fully irregular or fractal. Instead, real solid surfaces exhibit a limited degree of organization quantified by the fractal dimension, D. Fractal analysis was applied to investigate the effect of concentrations of HCl solutions on the structural and textural properties of chemically activated bentonite from southern Serbia. Acid treatment of bentonites is applied in order to remove impurities and various exchangeable cations from bentonite clay. Important physical changes in acid-activated smectite are the increase of the specific surface area and of the average pore volume, depending on acid strength, time and temperature of a treatment. On the basis of the sorption-structure analysis, the fractal dimension of the bentonite surfaces was determined by Mahnke and Mögel method. The fractal dimension evaluated by this method was 2.11 for the AB3 and 1.94 for the AB4.5 sample. The estimation of the values of the fractal dimension of activated bentonites was performed in the region of small pores, 0.5 nm  LT  rp  LT  2 nm.
PB  - Association of the Chemical Engineers of Serbia
T2  - Chemical Industry and Chemical Engineering Quarterly / CICEQ
T1  - Fractal analysis of physical adsorption on surfaces of acid activated bentonites from Serbia
VL  - 14
IS  - 4
SP  - 227
EP  - 229
DO  - 10.2298/CICEQ0804227R
ER  - 
@article{
author = "Rožić, Ljiljana and Novaković, Tatjana and Petrović, Srđan and Vuković, Zorica and Čupić, Željko",
year = "2008",
abstract = "Solid surfaces are neither ideally regular, that is, morphological and energetically homogeneous, nor are they fully irregular or fractal. Instead, real solid surfaces exhibit a limited degree of organization quantified by the fractal dimension, D. Fractal analysis was applied to investigate the effect of concentrations of HCl solutions on the structural and textural properties of chemically activated bentonite from southern Serbia. Acid treatment of bentonites is applied in order to remove impurities and various exchangeable cations from bentonite clay. Important physical changes in acid-activated smectite are the increase of the specific surface area and of the average pore volume, depending on acid strength, time and temperature of a treatment. On the basis of the sorption-structure analysis, the fractal dimension of the bentonite surfaces was determined by Mahnke and Mögel method. The fractal dimension evaluated by this method was 2.11 for the AB3 and 1.94 for the AB4.5 sample. The estimation of the values of the fractal dimension of activated bentonites was performed in the region of small pores, 0.5 nm  LT  rp  LT  2 nm.",
publisher = "Association of the Chemical Engineers of Serbia",
journal = "Chemical Industry and Chemical Engineering Quarterly / CICEQ",
title = "Fractal analysis of physical adsorption on surfaces of acid activated bentonites from Serbia",
volume = "14",
number = "4",
pages = "227-229",
doi = "10.2298/CICEQ0804227R"
}
Rožić, L., Novaković, T., Petrović, S., Vuković, Z.,& Čupić, Ž.. (2008). Fractal analysis of physical adsorption on surfaces of acid activated bentonites from Serbia. in Chemical Industry and Chemical Engineering Quarterly / CICEQ
Association of the Chemical Engineers of Serbia., 14(4), 227-229.
https://doi.org/10.2298/CICEQ0804227R
Rožić L, Novaković T, Petrović S, Vuković Z, Čupić Ž. Fractal analysis of physical adsorption on surfaces of acid activated bentonites from Serbia. in Chemical Industry and Chemical Engineering Quarterly / CICEQ. 2008;14(4):227-229.
doi:10.2298/CICEQ0804227R .
Rožić, Ljiljana, Novaković, Tatjana, Petrović, Srđan, Vuković, Zorica, Čupić, Željko, "Fractal analysis of physical adsorption on surfaces of acid activated bentonites from Serbia" in Chemical Industry and Chemical Engineering Quarterly / CICEQ, 14, no. 4 (2008):227-229,
https://doi.org/10.2298/CICEQ0804227R . .

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