TY - CHAP
T1 - Silver cementation with zinc from residual X ray fixer, experimental and thermochemical study
AU - Labra, M. Pérez
AU - Pérez, M. Reyes
AU - Serrano, J. A.Romero
AU - Dávila, E. O.Ávila
AU - Hernández, F. R.Barrientos
AU - Thangarasu, Pandiyan
N1 - Publisher Copyright:
© 2016 by The Minerals, Metals & Materials Society.
PY - 2016/1/1
Y1 - 2016/1/1
N2 - Silver cementation with zinc from residual X ray fixers (XRF) was studied. The chemical analysis of XRF showed 5.16 g/l (Ag), 0.56 g/l (Al), 5.24 g/L (K), 7.02 g/L (Na) and 172.56 g/L (S). The cementation process in terms of solution pH was thermodynamically modeled using FactSage by constructing the potential-pH diagram at 298.15 K. This diagram showed that the cementation process leads to metallic silver together with residual unreacted zinc. The parameters experimentally evaluated were: pH (ranged from 3.0 to 7.0, temperature (ranged from 298.15 to 318.15 K) and the Ag:Zn weight ratio (1:1, 1:2, 1:3, 1:4 and 1:5). The maxim silver cementation (99.99 % Ag) was obtained at 90 s of reaction, pH 6.0, 318 K and Ag:Zn equal to 1:3. Silver cementation increases whit the Ag:Zn weight ratio, pH and temperature increases. The X-Ray and SEM-EDS results showed that the cementation product is formed by Ag and Zn.
AB - Silver cementation with zinc from residual X ray fixers (XRF) was studied. The chemical analysis of XRF showed 5.16 g/l (Ag), 0.56 g/l (Al), 5.24 g/L (K), 7.02 g/L (Na) and 172.56 g/L (S). The cementation process in terms of solution pH was thermodynamically modeled using FactSage by constructing the potential-pH diagram at 298.15 K. This diagram showed that the cementation process leads to metallic silver together with residual unreacted zinc. The parameters experimentally evaluated were: pH (ranged from 3.0 to 7.0, temperature (ranged from 298.15 to 318.15 K) and the Ag:Zn weight ratio (1:1, 1:2, 1:3, 1:4 and 1:5). The maxim silver cementation (99.99 % Ag) was obtained at 90 s of reaction, pH 6.0, 318 K and Ag:Zn equal to 1:3. Silver cementation increases whit the Ag:Zn weight ratio, pH and temperature increases. The X-Ray and SEM-EDS results showed that the cementation product is formed by Ag and Zn.
KW - Cementation
KW - Silver
KW - Thermochemical
KW - X ray fixer
KW - Zn powder
UR - http://www.scopus.com/inward/record.url?scp=85015252888&partnerID=8YFLogxK
U2 - 10.1007/978-3-319-48210-1_76
DO - 10.1007/978-3-319-48210-1_76
M3 - Capítulo
SN - 9781119264392
SP - 605
EP - 613
BT - Characterization of Minerals, Metals, and Materials 2016
PB - Springer International Publishing
ER -