Naslov
Separation and Concentration of Silver by Ion Exchange Resin in Waste Waters

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

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

Izvornik
Preprints of the 5th International Solid Wastes, Sludges, and Residual Materials / - Rim, 1989, 122-128

Skup
The 5th International Solid Wastes, Sludges, and Residual Materials

Mjesto i datum
Rim, Italija, 1989

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
silver; separation; concentration; ion-exchange; waste waters

Sažetak
In our work, we propose separation and concentration of the silver by ion exchange resin and the return of the concentrated solution to in the technological process. In this work we have examined the equilibrium of ion exchange by means of the batch method. Waste waters (fixing bath and stop bath) are polyvalent solutions and silver in a free form or in a complex form. We have therefore experimented with Lewatit M-500, Ionenaustauscher I, Ionenaustauscher II and Ionenaustauscher IV. Silver was determined by means of AAS-method. Silver sorption to resins was tested in 0, 0001 to 5 mol/L HNO3. Silver elution from exchangers based on silver transformation to a stable complex. By varying the ligands (NH3, CN-, S2O32-, (NH2)2CO, HNO3, CNS-, pH solution and concentrations (0.1 M to 2 M)), optimum elution has been achieved. This optimum conditions are fundament for planing and calculation of column for recycling.

Izvorni jezik
Engleski

Znanstvena područja
Kemija

POVEZANOST RADA