SEPARATION OF ZINC FROM MANGANESE BY SOLVENT EXTRACTION FROM ACIDIC LEACHATES OF SPENT ZINC-MnO2 DRY CELLS USING NEUTRAL ORGANOPHOSPHORUS EXTRACTANTS

by Vinício Francisco Ibiapina, Júlio Carlos Afonso, Rubens Souza da Silva, Cláudio Augusto Vianna, José Luiz Mantovano

RECOVERY OF LEAD AND NOBLE METALS AFTER PROCESSING PRINTED CIRCUIT BOARDS FROM CELL PHONES BY LEACHING WITH MIXTURES CONTAINING HYDROGEN FLUORIDE

by Walner Costa Silva, Roger de Souza Corrêa, Pedro Rosário Gismonti, Júlio Carlos Afonso, Rubens Souza da Silva, Cláudio Augusto Vianna, José Luiz Mantovano