Characterization of multimetallic nanomaterial obtained from cyanidation solutions
- PDF / 534,204 Bytes
- 7 Pages / 612 x 792 pts (letter) Page_size
- 61 Downloads / 182 Views
Characterization of multimetallic nanomaterial obtained from cyanidation solutions. M. Soria-Aguilar1, F. Carrillo-Pedroza1, L.A. García-Cerda2, M. Sanchez-Castillo3, A. DávalosSánchez1, D. Puente-Siller1 1 Facultad de Metalurgia, U. A. de C. Carretera 57 K. 4.5, Monclova, Coahuila, México. 2 Centro de Investigación en Química Aplicada, Saltillo, Coahuila, México. 3 Facultad de Ciencias Químicas, Universidad Autónoma de San Luis Potosi, SLP, México. ABSTRACT The cyanide is the main process for the extraction of gold from its ores. This process produces rich cyanide solutions containing gold and silver, and waste cyanide solutions with different metal compounds such as copper, zinc and iron. These elements or compounds can be extracted in the form of high-value compounds as nanoparticles. This work presents some result of the remove and recovery of metallic values from waste cyanide solutions to obtain novel metallic nanoparticles. These materials were obtaining by modified sol-gel method from an industrial cyanide waste solution previously treated by advanced oxidation. This work reports the characterization from the nanoparticles by DRX and SEM-EDX. The results indicate that multimetallic nanoparticles can be obtained from cyanidation effluents. INTRODUCTION Nanoparticles have been the subject of intense scientific and technological activity due to their interesting size dependent physicochemical and optoelectronic properties and consequently exciting application potential. The controlled synthesis and characterization of nanosized materials have received a lot of attention during the last decade. These materials have found application in many important fields of science and technology as sensors, electrochemical cells, optical devises, and catalysts [1-5]. Moreover, one of the most important challenges in the comprehensive utilization of waste is to obtain metal values using methods and techniques that demand less energy consumption, environmentally friendly and economically favorable [1]. The polymer precursor (Pechini) method is among the ways of obtaining catalysts with a high degree of dispersion and uniform component distribution [1,2]. This method was initially intended for the synthesis of oxide ceramics for electronic applications, but later it found wide use in the syntheses of ceramic and catalytic materials [3-6]. In this context, this study shows the combination of ozone oxidation and sol-gel method as two techniques used to obtain nanoparticles from waste solutions of cyanide process. The precipitation of metal ions present in aqueous solution by advanced oxidation processes with ozone has been used recently to obtain metals and their oxides with different morphologies and compositions. For example, silver oxides in acidic conditions can precipitate a silver oxisalts, Ag7O8NO3, or silver oxide, AgO2, in alkaline conditions [7,8]. Moreover, sol-gel method allows the fabrication of amorphous and a polycrystalline material with special characteristics in composition and properties, the mechanism of gelat
Data Loading...
