▎ 摘　　要

NOVELTY - Method for improving microbial leaching of copper metal in used circuit board, involves crushing and sorting waste circuit board, obtaining metal-rich component, culturing a domestication strain, connecting a carbon rod anode and a carbon rod cathode with a copper conductor, placing obtained graphene-modified carbon rod electrode system in a reactor, domesticating strain, leaching metal-rich component, collecting leaching solution and filtering. The carbon rod anode is a conductive carbon rod. The carbon rod cathode is obtained by graphene modification of conductive carbon rod. USE - Method for improving microbial leaching of copper metal in used circuit board using graphene-modified carbon rod electrode system (claimed). ADVANTAGE - The microbial leaching of copper metal in used circuit board is economically improves by simple and environmentally-friendly process. DETAILED DESCRIPTION - Method for improving microbial leaching of copper metal in used circuit board, involves crushing and sorting waste circuit board, obtaining metal-rich component with different size, culturing a domestication strain to increase the tolerance of the strain to the copper ion, connecting a carbon rod anode and a carbon rod cathode with a copper conductor, forming a graphene-modified carbon rod electrode system, placing the carbon rod electrode system in a reactor, performing domestication of the strain, leaching metal-rich component at 25-30 degrees C and 120-150 rpm for 5-10 days, monitoring pH, divalent iron ion concentration, oxidation-reduction potential and copper leaching rate during leaching, collecting leaching solution and filtering. The area of carbon rod anode and carbon rod cathode is 0.5-10 cm2. The carbon rod anode is a conductive carbon rod. The carbon rod cathode is obtained by graphene modification of conductive carbon rod. The amount of graphene is 1-3 mg/cm2 with respect to the carbon rod cathode area.