Naslov
Ispitivanje akumulacije metalnih iona pomoću iono-izmjenjivačke smole
(Accumulation of metal ions on the ion exchange resins)

Autori
Cerjan-Stefanović, Štefica ; Kaštelan-Macan, Marija

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

Izvornik
Zbornik radova Konferencije Zaštita voda 83 / - , 1983, 155-158

Skup
Konferencija Zaštita voda 83

Mjesto i datum
Jugoslavija, 1983

Vrsta sudjelovanja
Poster

Vrsta recenzije
Domaća recenzija

Ključne riječi
akumulacija; metalni ioni; iono-izmjenjivačka smola
(accumulation; metal ions; ion exchange resins)

Sažetak
Cadmium and lead are toxic metals with maximal allowed concentration in wastewater of 2 mg/L. The accumulation of these metal ions on the ion exchange resins may be simple and selective. Optimal conditions for separation and elution of metal ions sould not be anticipated by the Gregor model of ion exchange. Therefore optimal conditions, with respect to pH of the medium and the temperature, for the metal separation and elution have been experimentally determined. Two systems were investigated: Lead-Amberlit-LR-120 and Cadmium-Amberli-LR-120 for the temperature interval from 293 to 343 K and in nitric acid and hydrochloric acid media. Values of distribution constants and coefficients that were obtained show that cadmium(II) is optimally sorbed in 0, 02 M HNO3 and at 323 K, and eluted with 2, 0 M HCl at 323 K. Lead(II) is optimally sorbed at 0, 01 M HNO3 and 293 K, and eluted with 4, 0 M HCl at 323 K. The values that were obtained for the distribution constants make possible the removal of cadmium and lead from the wastewater.

Izvorni jezik
Hrvatski

Znanstvena područja
Kemija

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