▎ 摘　　要

NOVELTY - The utility model claims a PCB board etching waste liquid copper ion removing system, belonging to the PCB board etching field. It comprises a first waste liquid cavity, alkali liquid chamber, a sedimentation filtration chamber, graphene copper-removing chamber, a second waste liquid chamber, a liquid level sensor, a pH sensor, a first inert electrode plate, a second inert electrode plate, electrode plate driving module, a first electric ball valve, a second electric ball valve, a third electric ball valve, an electric ball valve driving module, processor module and a power supply module; pH sensor is for monitoring pH value, controlling the first electric ball valve to inject the alkali liquid into the first waste liquid chamber for chemical precipitation, controlling the second electric ball valve to inject the waste liquid into the precipitate filtering chamber, filter net is for filtering the precipitate, waste liquid entering into the graphene copper-removing chamber, applying an electric field between the graphene electrode plate and second inert electrode plate, the copper ion is adsorbed on the graphite electrode plate. The utility model can efficiently remove copper ion in waste liquid.