Removal of copper ions from flotation wastewater by pulsed electric field enhanced internal micro-electrolysis

摘要

Flotation wastewater is a primarily heavy metal pollution source of mine which have a greater risk of environmental pollution. In this work, pulsed electric field was introduced to enhance the removal of copper ions from flotation wastewater by internal microelectrolysis (IME) system. Batch experiments and SEM, XRD characteristic analysis were conducted to investigate the optimum operation parameter and reaction mechanism was investigated. Results shown that the removal efficiency of Cu~(2+) were 99.95% under the condition of pH 4, current density of 20mA/cm~2, pulse period is 2s and electrode distance of 5mm. The removal of Cu~(2+) may due to the electro-deposition and flocculation precipitation under the function of pulsed electric field enhanced IME. This indicated that pulsed electric field can better improve the removal of Cu~(2+) significantly by IME.