Naslov
The equlibrium isotherm for lead removal by natural zeolite clinoptilolite: a comparison of batch and column methods

Autori
Perić, Jelena ; Vukojević Medvidović, Nediljka ; Trgo, Marina

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
MECC 06, Abstract Book / Vlahović, Igor ; Tibljaš, Darko ; Durin, Goran ; Biševac, Vanja - Zagreb : Faculty of Science, Faculty of Mining, Geology and Petroleum Engineering, University of Zagreb, 2006

Skup
3rd Mid-European Clay Conference

Mjesto i datum
Opatija, Hrvatska, 18.09.2006. - 23.09.2006

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
clinoptilolite; lead; Langmuir isotherm; Freundlich isotherm

Sažetak
Natural zeolite clinoptilolite has the property of ion exchange of its own hydrated Na, K, Ca and Mg ions with heavy metal ions from water solutions. The ion exchange process can be performed by the batch method or by the column method. This paper compares the equilibrium experimental results for ion exchange of lead ions on natural zeolite clinoptilolite, given from two different experimental performances by the batch and by the column method. The experimental points fit the Langmuir isotherm model better than the Freundlich one for batch and column experimental performance. The better fit of the Langmuir isotherm equation indicates that removal of lead ions by natural zeolite clinoptilolite occurs on a homogeneous surface, by monolayer sorption on internal and external particle surfaces, with a finite number of identical sites, and with no interaction between bound ions. The Langmuir model is used for calculation and comparison of exchange capacities that equal 149.25 mg Pb/g for the batch method and are somewhat higher and equal 175.44 mg Pb/g zeolite for the column method, which is one of advantages of latter method for its practical application in wastewater treatment.

Izvorni jezik
Engleski

Znanstvena područja
Kemijsko inženjerstvo

POVEZANOST RADA