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Abstract A dual cell system with chalcopyrite anode and MnO2 cathode was used to study the relations between time and such data as the electric quantity and the dissolved rates of the two minerals in the electro-generating leaching (EGL) and the bio-electro-generating leaching (BEGL), respectively.The results showed that the dissolved rates for Cu2+ and Fe2+in BEGL were almost 2 times faster than those in EGL, and nearly 3 times for Mn2+;the electric output increased near 3 times.