Reciclagem de placas de circuito impresso de computadores sucatados para a recuperação de estanho por eletroeluição de resinas poliméricas de troca iônica

This work presents experimental results for tin recovery from synthetic aqueous solution based on leaching liquors for computers recycling using the electroelution technique of cationic polymeric resin Amberlite IR-120® (Merck, USA). The resin was loaded with 200ml of aqueous solution 0.2g/l Sn in 2.18N H2SO4 (same metal content of a leaching liquor of printed circuit board-PCI from scrapped computers) through 10g of polymeric resin bed. The experiments were statistically planned by a replicated full factorial design method for three variables at two levels. The optimization was performed by the ascending path statistical method. The optimum experimental conditions for maximum tin recovery were 150A/m2 for current density, 45 minutes for electroelution and fair stirring intensity around 100rpm.