AMBIENTUM BIOETHICA BIOLOGIA CHEMIA DIGITALIA DRAMATICA EDUCATIO ARTIS GYMNAST. ENGINEERING EPHEMERIDES EUROPAEA GEOGRAPHIA GEOLOGIA HISTORIA HISTORIA ARTIUM INFORMATICA IURISPRUDENTIA MATHEMATICA MUSICA NEGOTIA OECONOMICA PHILOLOGIA PHILOSOPHIA PHYSICA POLITICA PSYCHOLOGIA-PAEDAGOGIA SOCIOLOGIA THEOLOGIA CATHOLICA THEOLOGIA CATHOLICA LATIN THEOLOGIA GR.-CATH. VARAD THEOLOGIA ORTHODOXA THEOLOGIA REF. TRANSYLVAN
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STUDIA CHEMIA - Ediţia nr.3 din 2012 | |||||||
Articol: |
ECO-FRIENDLY LEACHING OF BASE METALS FROM WASTE PRINTED CIRCUIT BOARDS: EXPERIMENTAL STUDY AND MATHEMATICAL MODELING . Autori: FLORICA IMRE-LUCACI, PETRU ILEA. |
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Rezumat: Our research aims the development of an eco-friendly leaching method for the separation of electronic components with high gold content, from other parts of waste printed circuit boards (WPCBs) without the use of any other separation technique. The base metals were removed in a specially designed leaching reactor using acidic FeCl3 solution. The dependency of the dissolution rate of base metals on the amount of FeCl3 and solid: liquid ratio was determined based on a kinetic model developed in MATLAB. The kinetic parameters identified by the experimental results indicate that the leaching rate of metals is more strongly dependent on the amount of FeCl3 used than on the solid: liquid ratio. The optimal values of the operating parameters were established in order to maximize the amount of dissolved metals and minimize the oxidant consumption. Keywords: FeCl3, waste printed circuit boards, metal dissolution, leaching rate. |
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