Naslov
Chemical behavior of iron modified zeolite at different pH values of aquaeous solutions

Autori
Ugrina, Marin ; Vukojević Medvidović, Nediljka ; Jelena Perić ; Trgo, Marina ; Daković, Aleksandra ; Nuić, Ivona ; Miličević, Sonja ; Živko, Sekulić

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
Proceedings 3rd Slovenian-Croatian Symposium on Zeolites / Tatjana Antonić Jelić ; Nataša Zabukovec Logar - Zagreb : Hrvatska zeolitna udruga (HZU), 2010, 69-72

ISBN
978-953-55373-2-8

Skup
3rd Slovenian-Croatian Symposium on Zeolites

Mjesto i datum
Trogir, Hrvatska, 16.09.2010. - 17.09.2010

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
iron modified zeolite ; clinoptilolite ; chemical behavior

Sažetak
The sample of natural zeolite originating from the Vranjska Banja deposit has been used in preparation of iron modified zeolite (IMZ), which has shown a significant increase of adsorption capacity towards heavy metal ions. This paper examines the chemical behavior of IMZ in the IMZ - ultrapure water system at different initial pH values in the range from 1.71 to 5.08. The results show that a rapid increase of pH is observed in the time interval up to 300 min in the pH range from 2.85 to 5.08. This can be attributed to the OH^- ions released during the process of exchange of H^+ ions from water with Na+ and other exchangeable cations from the zeolitic structure. At pH=1.71, the suspension pH was unchanged during 24 hours, when partial dissolution and degradation of the aluminosilicate structure have been observed.

Izvorni jezik
Engleski

Znanstvena područja
Kemijsko inženjerstvo

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