Naslov
The Effect of pH on Efficiency of Sorption/Desorption of Heavy Metals on Natural and Iron-modified Zeolite

Autori
Ugrina, Marin ; Trgo, Marina ; Vukojević Medvidović, Nediljka ; Nuić, Ivona

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

Izvornik
Proceedings of the IWA 8 th Eastern European Young Water Professionals Conference / Feierabend, M ; Drewnowski, J. ; Wójtowicz, P. - Wrocław : Wrocław University of Science and Technology, 2016, 665-671

Skup
Leaving the Ivory Tower Bridging the Gap between Academia, Industry

Mjesto i datum
Gdańsk, Poljska, 11.05.2016. - 14.05.2016

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Natural zeolite ; iron-modified zeolite ; heavy metals ; sorption/desorption

Sažetak
The removability of zinc, cadmium, copper and lead ions on natural zeolite (NZ) and its iron- modified form (IMZ) through sorption and desorption in relation to the initial pH was examined in order to investigate their possible application as materials for permeable reactive barrier (PBR). The analysis of the amount of metal uptake on zeolites and the equilibrium pH of the solution indicates that the uptake of heavy metals takes place in three zones. The width of the middle optimal zone for metal uptake depends on the type of metal cation and the solubility constant. It has been found that the sorption of copper is highly sensitive to the effect of pH, especially onto IMZ. In the optimal zone, the selectivity sequence of heavy metals on IMZ has the order Pb>Zn>Cd>Cu. The study of desorption of saturated IMZ at different pH values indicates its buffering properties and the ability to retain heavy metals at pH>3.18.

Izvorni jezik
Engleski

Znanstvena područja
Kemijsko inženjerstvo

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