®®®® SIIA Público

Título del libro: Characterization Of Minerals, Metals, And Materials 2016
Título del capítulo: SILVER CEMENTATION WITH ZINC FROM RESIDUAL X RAY FIXER, EXPERIMENTAL AND THERMOCHEMICAL STUDY

Autores UNAM:
PANDIYAN THANGARASU;
Autores externos:

Idioma:

Año de publicación:
2016
Palabras clave:

Cementation; Silver; X ray fixer; Zn Powder; thermochemical


Resumen:

Silver cementation with zinc from residual X my fixers (XRF) was studied. The chemical analysis of XRE showed 5.16 g/l (Ag), 0.56 g/l (Al), 5.24 g/l, (K), `.02 gIL (Na) and 172.56 gil, (S). The cementation process in terms of solution pH was thermodynamically modeled using EactSage by constructing the potential-pll 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.


Entidades citadas de la UNAM: