Comparison of structural, textural and thermal characteristics of pure and acid treated bentonites from Aleksinac and Petrovac (Serbia)
Apstrakt
Bentonite samples collected from vicinity of Petrovac and Aleksinac were treated with different sulfuric acid molarities. Acid attack dissolved the octahedral sheets by interlayer and edge attack. The effects of the H(2)SO(4) acid caused an exchange of Al(3+), Fe(3+) and Mg(2+) with H. ions leading to a modification of the smectite crystalline structure. The Mg and Fe substitution in the octahedral sheets promoted the dispersion of corresponding layers and formation of amorphous silicon. The activated bentonites, after the treatment of sulfuric acid, exhibited a lower cation-exchange capacity (CEC)and significant increase of specific surface area from 6 to 387 m(2) g(-1) (bentonite from Petrovac) and from 11 to 306 m(2) g(-1) (bentonite from Aleksinac). The acid reaction caused a splitting of particles within the octahedral sheet which led to an increase in specific surface area and decrease in CEC in both bentonites. (C) 2011 Elsevier B.V. All rights reserved.
Ključne reči:
Bentonite / acid activation / Smectite / Cation exchange capacity / Specific surface areaIzvor:
Spectrochimica Acta. Part A: Molecular and Biomolecular Spectroscopy, 2011, 82, 1, 389-395Finansiranje / projekti:
- Ministry of Science and Technological Development of the Republic of Serbia, Ministry of Education and Science of Macedonia
DOI: 10.1016/j.saa.2011.07.068
ISSN: 1386-1425
PubMed: 21824809
WoS: 000295956500057
Scopus: 2-s2.0-80052813441
Kolekcije
Institucija/grupa
VinčaTY - JOUR AU - Tomić, Zorica P. AU - Logar, Vesna P. AU - Babić, Biljana M. AU - Rogan, Jelena R. AU - Makreski, Petre PY - 2011 UR - https://vinar.vin.bg.ac.rs/handle/123456789/4524 AB - Bentonite samples collected from vicinity of Petrovac and Aleksinac were treated with different sulfuric acid molarities. Acid attack dissolved the octahedral sheets by interlayer and edge attack. The effects of the H(2)SO(4) acid caused an exchange of Al(3+), Fe(3+) and Mg(2+) with H. ions leading to a modification of the smectite crystalline structure. The Mg and Fe substitution in the octahedral sheets promoted the dispersion of corresponding layers and formation of amorphous silicon. The activated bentonites, after the treatment of sulfuric acid, exhibited a lower cation-exchange capacity (CEC)and significant increase of specific surface area from 6 to 387 m(2) g(-1) (bentonite from Petrovac) and from 11 to 306 m(2) g(-1) (bentonite from Aleksinac). The acid reaction caused a splitting of particles within the octahedral sheet which led to an increase in specific surface area and decrease in CEC in both bentonites. (C) 2011 Elsevier B.V. All rights reserved. T2 - Spectrochimica Acta. Part A: Molecular and Biomolecular Spectroscopy T1 - Comparison of structural, textural and thermal characteristics of pure and acid treated bentonites from Aleksinac and Petrovac (Serbia) VL - 82 IS - 1 SP - 389 EP - 395 DO - 10.1016/j.saa.2011.07.068 ER -
@article{ author = "Tomić, Zorica P. and Logar, Vesna P. and Babić, Biljana M. and Rogan, Jelena R. and Makreski, Petre", year = "2011", abstract = "Bentonite samples collected from vicinity of Petrovac and Aleksinac were treated with different sulfuric acid molarities. Acid attack dissolved the octahedral sheets by interlayer and edge attack. The effects of the H(2)SO(4) acid caused an exchange of Al(3+), Fe(3+) and Mg(2+) with H. ions leading to a modification of the smectite crystalline structure. The Mg and Fe substitution in the octahedral sheets promoted the dispersion of corresponding layers and formation of amorphous silicon. The activated bentonites, after the treatment of sulfuric acid, exhibited a lower cation-exchange capacity (CEC)and significant increase of specific surface area from 6 to 387 m(2) g(-1) (bentonite from Petrovac) and from 11 to 306 m(2) g(-1) (bentonite from Aleksinac). The acid reaction caused a splitting of particles within the octahedral sheet which led to an increase in specific surface area and decrease in CEC in both bentonites. (C) 2011 Elsevier B.V. All rights reserved.", journal = "Spectrochimica Acta. Part A: Molecular and Biomolecular Spectroscopy", title = "Comparison of structural, textural and thermal characteristics of pure and acid treated bentonites from Aleksinac and Petrovac (Serbia)", volume = "82", number = "1", pages = "389-395", doi = "10.1016/j.saa.2011.07.068" }
Tomić, Z. P., Logar, V. P., Babić, B. M., Rogan, J. R.,& Makreski, P.. (2011). Comparison of structural, textural and thermal characteristics of pure and acid treated bentonites from Aleksinac and Petrovac (Serbia). in Spectrochimica Acta. Part A: Molecular and Biomolecular Spectroscopy, 82(1), 389-395. https://doi.org/10.1016/j.saa.2011.07.068
Tomić ZP, Logar VP, Babić BM, Rogan JR, Makreski P. Comparison of structural, textural and thermal characteristics of pure and acid treated bentonites from Aleksinac and Petrovac (Serbia). in Spectrochimica Acta. Part A: Molecular and Biomolecular Spectroscopy. 2011;82(1):389-395. doi:10.1016/j.saa.2011.07.068 .
Tomić, Zorica P., Logar, Vesna P., Babić, Biljana M., Rogan, Jelena R., Makreski, Petre, "Comparison of structural, textural and thermal characteristics of pure and acid treated bentonites from Aleksinac and Petrovac (Serbia)" in Spectrochimica Acta. Part A: Molecular and Biomolecular Spectroscopy, 82, no. 1 (2011):389-395, https://doi.org/10.1016/j.saa.2011.07.068 . .