Fractal analysis of physical adsorption on surfaces of acid activated bentonites from Serbia
Apstrakt
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.
Ključne reči:
fractal analysis / adsorption isotherm / BET method / bentoniteIzvor:
Chemical Industry and Chemical Engineering Quarterly / CICEQ, 2008, 14, 4, 227-229Izdavač:
- Association of the Chemical Engineers of Serbia
Finansiranje / projekti:
- Sinteza, karakterizacija i testiranje katalitičkih svojstava specijalno dizajniranih materijala (RS-MESTD-MPN2006-2010-142019)
DOI: 10.2298/CICEQ0804227R
ISSN: 1451-9372
WoS: 000262278100005
Scopus: 2-s2.0-74049118079
Institucija/grupa
IHTMTY - 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 . .