REMOVAL METHOD OF HEAVY METALS FROM THE SEDIMENTS USING ELECTROKINETICS

摘要

PURPOSE: A method for removing heavy metals from sediments is provided to remove heavy metals from sediments including the heavy metals to have useful resources and similar soil. CONSTITUTION: Sediments including heavy metals are inputted to an electrokinetic purification system including an anion room with an anion and a cathode room with a cathode. The current is supplied to the electrode to make current density of 0.1 to 2 mA/cm^2 or voltage slant of 0.1 to 2 V/cm and circulated water is supplied to the anode room or cathode room. The cadmium, copper, lead, chrome, zinc are moved to anode or cathode from the sediments by electro-osmotic, electro-phoresis, and electro-migration phenomenons under an electric field. The anode is a titanium electrode coated with platinum. The cathode is a graphite electrode. The nitric acid solution is circulated in the cathode room.