Research Of External Electric Field Enhance The Treatment Of Heavy Metal Waste Water By Carbon Membranes

In recent years, experts and scholars at home and abroad devote themselves to analyze the fundamental cause of marine heavy metal pollution and find the right way of pollution control because of the special characteristics of heavy metal pollution. The main sources of heavy metal pollution are directly or indirectly discharge of industrial wastewater. Therefore, to control marine heavy metal pollution, it must be effectively control and reduce the heavy metal content of industrial wastewater from the source.This paper uses conductive carbon membrane whose pore size is 0.433 um to treatment heavy metal wastewater by way of dead end filtration. It mainly researches that electric field enhance membrane technology treatment of different heavy metals wastewater and discusses the solution of the initial concentration, rotating speed of peristaltic pump, electric field intensity, the solution pH value on the membrane separation effect and the reasons of influence through ions intercept barrier membrane separation. In addition, it optimizes the experimental conditions for different heavy metals and determines their critical electric field intensity. After processing, the leaching liquid solution concentration is determined by atomic absorption spectrophotometer to calculate removal rate. Scanning carbon film with electron microscope displays intuitive membrane pore structure morphology and distribution of heavy metal content. Results show that the treatment effect of low concentration heavy metal wastewater is better than that of high concentration. Under the effect of mass transfer driving force, the greater the peristaltic pump rotation speed, the larger the membrane permeation flux. Carbon membrane permeate flux and the removal rate of heavy metal ions increase significantly as a result of electrophoresis, electroosmosis effect and the existence of the electrochemical reaction. The biggest membrane flux difference between with or without the electric field is 178.71L/(m2·h·bar) and the critical field strength of lead, nickel and chromium is 0.2V/cm、0.4V/cm and 0.6V/cm respectively which may has relationship with their relative atomic mass and the position located in the sequence table.