Naslov
Metal Ion Exchange by Natural and Modified Zeolites

Autori
Ćurković, Lidija ; Cerjan-Stefanović, Štefica ; Filipan, Tugomir

Izvornik
Water research (0043-1354) 31 (1997), 6; 1379-1382

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
natural zeolites; modified zeolites; ion exchange; lead removal; cadmium removal

Sažetak
The lead and cadmium removal from waste waters by natural and pretreatment zeolites was examined by using a batch-type method. The results demonstrated that the natural zeolites contained a complement of exchangeable Na, K and Ca ions but exposing them to 2 M NaCl solution at 22 oC and 70 oC, respectively, converted them to a near homoionic state in Na-form. Lead and cadmium removal results using natural zeolites and treated zeolites showed that treatment improved both the exchange capacity and the removal efficiency. The influence of the temperature on ion-exchange process was examined. It was found that the metal uptake was increased with increasing the temperature during the ion-exchange process. Natural and Modified zeolites remove toxic metals from waste waters. Key words: natural zeolites, modified zeolites, ion exchange, removal lead, removal cadmium

Izvorni jezik
Engleski

Znanstvena područja
Kemijsko inženjerstvo, Politologija

POVEZANOST RADA