Catalytic effect of pyrite on the leaching of chalcopyrite concentrates in chemical, biological and electrobiochemical systems

► In electrochemical bioleaching of chalcopyrite concentrates, 87% Cu is extracted at 20% pulp density. ► Chalcopyrite is bioleached selectively relative to pyrite at low redox potentials. ► Electrochemical system improves galvanical, biological and chemical subsystems.