Adsorption of strontium on different sodium-enriched bentonites
2017
Аутори
Marinović, SanjaAjduković, Marija
Jović-Jovičić, Nataša
Mudrinić, Tihana
Nedić-Vasiljević, Bojana
Banković, Predrag
Milutinović Nikolić, Aleksandra
Чланак у часопису (Објављена верзија)
Метаподаци
Приказ свих података о документуАпстракт
Bentonites from three different deposits (Wyoming, TX, USA and Bogovina, Serbia) with similar cation exchange capacities were sodium enriched and tested as adsorbents for Sr2+ in aqueous solutions. X-Ray diffraction analysis confirmed successful Na-exchange. The textural properties of the bentonite samples were determined using low-temperature the nitrogen physisorption method. Significant differences in the textural properties between the different sodium enriched bentonites were found. Adsorption was investigated with respect to adsorbent dosage, pH, contact time and the initial concentration of Sr2+. The adsorption capacity increased with pH. In the pH range from 4.0-8.5, the amount of adsorbed Sr2+ was almost constant but 2-3 times smaller than at pH approximate to 11. Further experiments were performed at the unadjusted pH since extreme alkaline conditions are environmentally hostile and inapplicable in real systems. The adsorption capacity of all the investigated adsorbents towar...d Sr2+ was similar under the investigated conditions, regardless of significant differences in the specific surface areas. It was shown and confirmed by the Dubinin-Radushkevich model that the cation exchange mechanism was the dominant mechanism of Sr2+ adsorption. Their developed microporous structures contributed to the Sr2+ adsorption process. The adsorption kinetics obeyed the pseudo-second-order model. The isotherm data were best fitted with the Langmuir isotherm model.
Кључне речи:
Sr2+ / water purification / Na-enriched clays / cation exchange capacity / textural propertiesИзвор:
Journal of the Serbian Chemical Society, 2017, 82, 4, 449-463Издавач:
- Serbian Chemical Society
Финансирање / пројекти:
- Наноструктурни функционални и композитни материјали у каталитичким и сорпционим процесима (RS-MESTD-Integrated and Interdisciplinary Research (IIR or III)-45001)
DOI: 10.2298/JSC161010008M
ISSN: 0352-5139
WoS: 000404614300010
Scopus: 2-s2.0-85019376703
Институција/група
IHTMTY - JOUR AU - Marinović, Sanja AU - Ajduković, Marija AU - Jović-Jovičić, Nataša AU - Mudrinić, Tihana AU - Nedić-Vasiljević, Bojana AU - Banković, Predrag AU - Milutinović Nikolić, Aleksandra PY - 2017 UR - https://cer.ihtm.bg.ac.rs/handle/123456789/2251 AB - Bentonites from three different deposits (Wyoming, TX, USA and Bogovina, Serbia) with similar cation exchange capacities were sodium enriched and tested as adsorbents for Sr2+ in aqueous solutions. X-Ray diffraction analysis confirmed successful Na-exchange. The textural properties of the bentonite samples were determined using low-temperature the nitrogen physisorption method. Significant differences in the textural properties between the different sodium enriched bentonites were found. Adsorption was investigated with respect to adsorbent dosage, pH, contact time and the initial concentration of Sr2+. The adsorption capacity increased with pH. In the pH range from 4.0-8.5, the amount of adsorbed Sr2+ was almost constant but 2-3 times smaller than at pH approximate to 11. Further experiments were performed at the unadjusted pH since extreme alkaline conditions are environmentally hostile and inapplicable in real systems. The adsorption capacity of all the investigated adsorbents toward Sr2+ was similar under the investigated conditions, regardless of significant differences in the specific surface areas. It was shown and confirmed by the Dubinin-Radushkevich model that the cation exchange mechanism was the dominant mechanism of Sr2+ adsorption. Their developed microporous structures contributed to the Sr2+ adsorption process. The adsorption kinetics obeyed the pseudo-second-order model. The isotherm data were best fitted with the Langmuir isotherm model. PB - Serbian Chemical Society T2 - Journal of the Serbian Chemical Society T1 - Adsorption of strontium on different sodium-enriched bentonites VL - 82 IS - 4 SP - 449 EP - 463 DO - 10.2298/JSC161010008M ER -
@article{ author = "Marinović, Sanja and Ajduković, Marija and Jović-Jovičić, Nataša and Mudrinić, Tihana and Nedić-Vasiljević, Bojana and Banković, Predrag and Milutinović Nikolić, Aleksandra", year = "2017", abstract = "Bentonites from three different deposits (Wyoming, TX, USA and Bogovina, Serbia) with similar cation exchange capacities were sodium enriched and tested as adsorbents for Sr2+ in aqueous solutions. X-Ray diffraction analysis confirmed successful Na-exchange. The textural properties of the bentonite samples were determined using low-temperature the nitrogen physisorption method. Significant differences in the textural properties between the different sodium enriched bentonites were found. Adsorption was investigated with respect to adsorbent dosage, pH, contact time and the initial concentration of Sr2+. The adsorption capacity increased with pH. In the pH range from 4.0-8.5, the amount of adsorbed Sr2+ was almost constant but 2-3 times smaller than at pH approximate to 11. Further experiments were performed at the unadjusted pH since extreme alkaline conditions are environmentally hostile and inapplicable in real systems. The adsorption capacity of all the investigated adsorbents toward Sr2+ was similar under the investigated conditions, regardless of significant differences in the specific surface areas. It was shown and confirmed by the Dubinin-Radushkevich model that the cation exchange mechanism was the dominant mechanism of Sr2+ adsorption. Their developed microporous structures contributed to the Sr2+ adsorption process. The adsorption kinetics obeyed the pseudo-second-order model. The isotherm data were best fitted with the Langmuir isotherm model.", publisher = "Serbian Chemical Society", journal = "Journal of the Serbian Chemical Society", title = "Adsorption of strontium on different sodium-enriched bentonites", volume = "82", number = "4", pages = "449-463", doi = "10.2298/JSC161010008M" }
Marinović, S., Ajduković, M., Jović-Jovičić, N., Mudrinić, T., Nedić-Vasiljević, B., Banković, P.,& Milutinović Nikolić, A.. (2017). Adsorption of strontium on different sodium-enriched bentonites. in Journal of the Serbian Chemical Society Serbian Chemical Society., 82(4), 449-463. https://doi.org/10.2298/JSC161010008M
Marinović S, Ajduković M, Jović-Jovičić N, Mudrinić T, Nedić-Vasiljević B, Banković P, Milutinović Nikolić A. Adsorption of strontium on different sodium-enriched bentonites. in Journal of the Serbian Chemical Society. 2017;82(4):449-463. doi:10.2298/JSC161010008M .
Marinović, Sanja, Ajduković, Marija, Jović-Jovičić, Nataša, Mudrinić, Tihana, Nedić-Vasiljević, Bojana, Banković, Predrag, Milutinović Nikolić, Aleksandra, "Adsorption of strontium on different sodium-enriched bentonites" in Journal of the Serbian Chemical Society, 82, no. 4 (2017):449-463, https://doi.org/10.2298/JSC161010008M . .