SPECIATION AND CHARACTERIZATION OF E-WASTE, USING ANALYTICAL TECHNIQUES
Hernández Ávila, Juan
2016
C. CORTÉS LÓPEZ, V. E. REYES CRUZ, M. A. VELOZ RODRÍGUEZ, J. HERNÁNDEZ ÁVILA, J. FLORES BADILLO, J.A. COBOS MURCIA, SPECIATION AND CHARACTERIZATION OF E-WASTE, USING ANALYTICAL TECHNIQUES, CHARACTERIZATION OF MINERALS, METALS, AND MATERIALS 2016, 629-636, (2016), ISBN 978-1-119-26439-2, EDITED BY: SHADIA JAMIL IKHMAYIES, BOWEN LI, JOHN S. CARPENTER, JIANN-YANG HWANG, SERGIO NEVES MONTEIRO, JIAN LI, DONATO FIRRAO, MINGMING ZHANG, ZHIWEI PENG, JUAN P. ESCOBEDO-DIAZ, AND CHENGUANG BAI, PUBLISHED BY JOHN WILEY & SONS, INC., HOBOKEN, NEW JERSEY.
Abstract
Electronic waste (e-waste), have a high potential as a source of precious metals, since they can contain metals like silver, gold, platinum, copper, zinc, nickel, tin and others. In this paper some e-waste were characterized using several analytical techniques as Scanning Electron Microscopy (SEM), X-ray diffraction (XRD) and inductively coupled plasma (ICP) in addition to the thermodynamic study by Pourbaix diagrams of silver (Ag), gold (Au), platinum (Pt), copper (Cu), nickel (Ni), tin (Sn) and zinc (Zn); considering an average low concentration of HNO3 (10% v/v). With results of the characterization was determined that the e-waste is an ideal source for the recovery of valuable metals. Similarly, the thermodynamic studies showed that it is possible to obtain all metallic species except Pt, in a potential window of 1.45V to 2.0V vs SCE.
