Study of Metal Leaching from Printed Circuit Boards by Improved Electrochemical Hydrochlorination Technique Using Alternating Current

This paper presents the results of leaching metals from computer PCBs by electrochemical hydrochlorination using alternating current (AC) with an industrial frequency (50 Hz). Leaching was carried out a disintegrator-crushed motherboard particle size (d) <90 ?m. In course research, efficiency including Fe, Sn, Mn, Al, Cu, Zn, Pb, Ni, Ti, Sb, Cr, Co and V evaluated depending on process parameters, such as AC density, experiment duration, hydrochloric acid concentration in electrolyte solution, solid/liquid ratio, temperature, loading option raw material (loading 1 involving into 2 filter containers attached to electrodes). The research showed that superimposition significantly intensifies metals. It established complete Ti under experimental conditions 2, CHCl = 6 mol·L?1, i 0.80 A·cm?2, S/L 8.6 g·L?1), is reached after 1.5 h, Cu Ni h beginning experiment. At same time, degree other Co-78.8%, Cr-84.4%, Sb-91.7%, Fe-98.9%, V-98.1% Pb-5.1%. also reports all abovementioned metals, well Ag Pd, mixed d < 90 ?m 1.