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Adsorpcija uranijum(VI)-jona na modifikovanom hejlanditsko/klinoptilolitskom zeolitskom tufu

Uranium(VI) adsorption on surfactant modified heulandite/clinoptilolite rich tuff

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2006
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Authors
Matijašević, Srđan
Daković, Aleksandra
Tomašević-Čanović, Magdalena
Stojanović, Mirjana
Ileš, Deana
Article (Published version)
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Abstract
U radu je ispitivana adsorpcija uranijum(VI)-jona na površinski modifikovanom hejlanditsko/klinoptilolitskom zeolitskom tufu (organozeolitu). Organozeoliti su dobijeni jonskom izmenom neorganskih katjona sa površine zeolita sa heksadecil trimetil amonijum (HDTMA) jonima. Dobijeni rezultati su pokazali da je adsorpcija uranijum(VI)-jona na nemodifikovanom zeolitskom tufu niska (indeks adsorpcije 35% odnosno 0,34 mg uranijum(VI)-jona/g adsorbenta), dok kod organozeolita, adsorpcija uranijum(VI)-jona raste sa porastom sadržaja HDTMA na površini hejlandita/klinoptilolita. Najviši indeksi adsorpcije su dobijeni na organozeolitu od kojeg su svi katjoni sa spoljašnje površine zamenjeni sa HDTMA(OA.-10). Ispitivanja adsorpcije uranijum(VI)-jona na organozeolitu OA-10, na različitim pH su pokazala da adsorpcija raste sa porastom sadržaja adsorbenta u suspenziji. Kako oblik uranijum(VI)-jona u rastvoru, zavisi od pH sredine, isti oblik adsorpcionih izotermi na pH 6 i 8 (Langmuir-ov tip izoterme)..., ukazuje da se uranijum(VI)-jon u istom obliku apsorbuje na površini zeolitskog tufa. Adsorpcija uranijum(VI)-jona pri pH 3 odgovara Tipu III adsorpcione izoterme.

The adsorption of uranium(VI) on heulandite/clinoptilolite rich zeolitic tuff modified with different amounts (2, 5 and 10 meq/100 g) of hexadecyltrimethyl ammonium (HDTMA) ion was investigated. The organozeolites were prepared by ion exchange of inorganic cations at the zeolite surface with HDTMA ions, and the three prepared samples were denoted as OA-2, OA-5 and OA-10. The maximal amount of HDTMAin the organozeolite OA-10 (10 meq/100 g) was equal to the external cation exchange capacity of the starting material. The results showed that uranium( VI) adsorption on unmodified zeolitic tuff was low (0.34 mg uranium(VI)/g adsorbent), while for the organozeolites, the adsorption increased with increasing amount of HDTMA at the zeolitic surface. The highest adsorption indexes were achieved for the organozeolite OA-10, in which all the surface inorganic cations had been replaced with HDTMA. An investigation of the adsorption of uranium(VI) ions onto organozeolite OA-10 at different pH values... (3, 6 and 8) showed that the adsorption index increased with increasing amount of adsorbent in the suspension. Since uranium(VI) speciation is highly dependent on pH, from the adsorption isotherms, it can be seen that uranium(VI) adsorption on organozeolite OA-10 at pH 6 and 8 is well described by a Langmuir type of isotherm, while at pH 3, it corresponds to a Type III isotherm.

Keywords:
zeolite / uranium(VI) / organozeolite / clinoptilolite/heulandite / adsorption
Source:
Journal of the Serbian Chemical Society, 2006, 71, 12, 1323-1331
Publisher:
  • Srpsko hemijsko društvo, Beograd

DOI: 10.2298/JSC0612323M

ISSN: 0352-5139

WoS: 000243581100009

Scopus: 2-s2.0-33846395060
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URI
https://ritnms.itnms.ac.rs/handle/123456789/103
Collections
  • Radovi istraživača / Researchers’ publications
Institution/Community
Institut za tehnologiju nuklearnih i drugih mineralnih sirovina
TY  - JOUR
AU  - Matijašević, Srđan
AU  - Daković, Aleksandra
AU  - Tomašević-Čanović, Magdalena
AU  - Stojanović, Mirjana
AU  - Ileš, Deana
PY  - 2006
UR  - https://ritnms.itnms.ac.rs/handle/123456789/103
AB  - U radu je ispitivana adsorpcija uranijum(VI)-jona na površinski modifikovanom hejlanditsko/klinoptilolitskom zeolitskom tufu (organozeolitu). Organozeoliti su dobijeni jonskom izmenom neorganskih katjona sa površine zeolita sa heksadecil trimetil amonijum (HDTMA) jonima. Dobijeni rezultati su pokazali da je adsorpcija uranijum(VI)-jona na nemodifikovanom zeolitskom tufu niska (indeks adsorpcije 35% odnosno 0,34 mg uranijum(VI)-jona/g adsorbenta), dok kod organozeolita, adsorpcija uranijum(VI)-jona raste sa porastom sadržaja HDTMA na površini hejlandita/klinoptilolita. Najviši indeksi adsorpcije su dobijeni na organozeolitu od kojeg su svi katjoni sa spoljašnje površine zamenjeni sa HDTMA(OA.-10). Ispitivanja adsorpcije uranijum(VI)-jona na organozeolitu OA-10, na različitim pH su pokazala da adsorpcija raste sa porastom sadržaja adsorbenta u suspenziji. Kako oblik uranijum(VI)-jona u rastvoru, zavisi od pH sredine, isti oblik adsorpcionih izotermi na pH 6 i 8 (Langmuir-ov tip izoterme), ukazuje da se uranijum(VI)-jon u istom obliku apsorbuje na površini zeolitskog tufa. Adsorpcija uranijum(VI)-jona pri pH 3 odgovara Tipu III adsorpcione izoterme.
AB  - The adsorption of uranium(VI) on heulandite/clinoptilolite rich zeolitic tuff modified with different amounts (2, 5 and 10 meq/100 g) of hexadecyltrimethyl ammonium (HDTMA) ion was investigated. The organozeolites were prepared by ion exchange of inorganic cations at the zeolite surface with HDTMA ions, and the three prepared samples were denoted as OA-2, OA-5 and OA-10. The maximal amount of HDTMAin the organozeolite OA-10 (10 meq/100 g) was equal to the external cation exchange capacity of the starting material. The results showed that uranium( VI) adsorption on unmodified zeolitic tuff was low (0.34 mg uranium(VI)/g adsorbent), while for the organozeolites, the adsorption increased with increasing amount of HDTMA at the zeolitic surface. The highest adsorption indexes were achieved for the organozeolite OA-10, in which all the surface inorganic cations had been replaced with HDTMA. An investigation of the adsorption of uranium(VI) ions onto organozeolite OA-10 at different pH values (3, 6 and 8) showed that the adsorption index increased with increasing amount of adsorbent in the suspension. Since uranium(VI) speciation is highly dependent on pH, from the adsorption isotherms, it can be seen that uranium(VI) adsorption on organozeolite OA-10 at pH 6 and 8 is well described by a Langmuir type of isotherm, while at pH 3, it corresponds to a Type III isotherm.
PB  - Srpsko hemijsko društvo, Beograd
T2  - Journal of the Serbian Chemical Society
T1  - Adsorpcija uranijum(VI)-jona na modifikovanom hejlanditsko/klinoptilolitskom zeolitskom tufu
T1  - Uranium(VI) adsorption on surfactant modified heulandite/clinoptilolite rich tuff
EP  - 1331
IS  - 12
SP  - 1323
VL  - 71
DO  - 10.2298/JSC0612323M
UR  - conv_520
ER  - 
@article{
author = "Matijašević, Srđan and Daković, Aleksandra and Tomašević-Čanović, Magdalena and Stojanović, Mirjana and Ileš, Deana",
year = "2006",
abstract = "U radu je ispitivana adsorpcija uranijum(VI)-jona na površinski modifikovanom hejlanditsko/klinoptilolitskom zeolitskom tufu (organozeolitu). Organozeoliti su dobijeni jonskom izmenom neorganskih katjona sa površine zeolita sa heksadecil trimetil amonijum (HDTMA) jonima. Dobijeni rezultati su pokazali da je adsorpcija uranijum(VI)-jona na nemodifikovanom zeolitskom tufu niska (indeks adsorpcije 35% odnosno 0,34 mg uranijum(VI)-jona/g adsorbenta), dok kod organozeolita, adsorpcija uranijum(VI)-jona raste sa porastom sadržaja HDTMA na površini hejlandita/klinoptilolita. Najviši indeksi adsorpcije su dobijeni na organozeolitu od kojeg su svi katjoni sa spoljašnje površine zamenjeni sa HDTMA(OA.-10). Ispitivanja adsorpcije uranijum(VI)-jona na organozeolitu OA-10, na različitim pH su pokazala da adsorpcija raste sa porastom sadržaja adsorbenta u suspenziji. Kako oblik uranijum(VI)-jona u rastvoru, zavisi od pH sredine, isti oblik adsorpcionih izotermi na pH 6 i 8 (Langmuir-ov tip izoterme), ukazuje da se uranijum(VI)-jon u istom obliku apsorbuje na površini zeolitskog tufa. Adsorpcija uranijum(VI)-jona pri pH 3 odgovara Tipu III adsorpcione izoterme., The adsorption of uranium(VI) on heulandite/clinoptilolite rich zeolitic tuff modified with different amounts (2, 5 and 10 meq/100 g) of hexadecyltrimethyl ammonium (HDTMA) ion was investigated. The organozeolites were prepared by ion exchange of inorganic cations at the zeolite surface with HDTMA ions, and the three prepared samples were denoted as OA-2, OA-5 and OA-10. The maximal amount of HDTMAin the organozeolite OA-10 (10 meq/100 g) was equal to the external cation exchange capacity of the starting material. The results showed that uranium( VI) adsorption on unmodified zeolitic tuff was low (0.34 mg uranium(VI)/g adsorbent), while for the organozeolites, the adsorption increased with increasing amount of HDTMA at the zeolitic surface. The highest adsorption indexes were achieved for the organozeolite OA-10, in which all the surface inorganic cations had been replaced with HDTMA. An investigation of the adsorption of uranium(VI) ions onto organozeolite OA-10 at different pH values (3, 6 and 8) showed that the adsorption index increased with increasing amount of adsorbent in the suspension. Since uranium(VI) speciation is highly dependent on pH, from the adsorption isotherms, it can be seen that uranium(VI) adsorption on organozeolite OA-10 at pH 6 and 8 is well described by a Langmuir type of isotherm, while at pH 3, it corresponds to a Type III isotherm.",
publisher = "Srpsko hemijsko društvo, Beograd",
journal = "Journal of the Serbian Chemical Society",
title = "Adsorpcija uranijum(VI)-jona na modifikovanom hejlanditsko/klinoptilolitskom zeolitskom tufu, Uranium(VI) adsorption on surfactant modified heulandite/clinoptilolite rich tuff",
pages = "1331-1323",
number = "12",
volume = "71",
doi = "10.2298/JSC0612323M",
url = "conv_520"
}
Matijašević, S., Daković, A., Tomašević-Čanović, M., Stojanović, M.,& Ileš, D.. (2006). Adsorpcija uranijum(VI)-jona na modifikovanom hejlanditsko/klinoptilolitskom zeolitskom tufu. in Journal of the Serbian Chemical Society
Srpsko hemijsko društvo, Beograd., 71(12), 1323-1331.
https://doi.org/10.2298/JSC0612323M
conv_520
Matijašević S, Daković A, Tomašević-Čanović M, Stojanović M, Ileš D. Adsorpcija uranijum(VI)-jona na modifikovanom hejlanditsko/klinoptilolitskom zeolitskom tufu. in Journal of the Serbian Chemical Society. 2006;71(12):1323-1331.
doi:10.2298/JSC0612323M
conv_520 .
Matijašević, Srđan, Daković, Aleksandra, Tomašević-Čanović, Magdalena, Stojanović, Mirjana, Ileš, Deana, "Adsorpcija uranijum(VI)-jona na modifikovanom hejlanditsko/klinoptilolitskom zeolitskom tufu" in Journal of the Serbian Chemical Society, 71, no. 12 (2006):1323-1331,
https://doi.org/10.2298/JSC0612323M .,
conv_520 .

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