| 摘要 |
PURPOSE: A surface modification method of activated carbon for wastewater treatment is provided, which improves adsorption capacity of recalcitrant organic contaminants of industrial wastewater by reducing the surface of activated carbon. CONSTITUTION: The surface modification method of activated carbon comprises the process of reducing activated carbon by directly reacting dithionite ions (S2O4¬2-) produced through electrolysis of sulfurous acid gas with activated carbon, wherein the activated carbon surface modification method is performed by carrying out electrolysis as agitating the activated carbon after injecting activated carbon into the cathode chamber of an electrolytic cell comprising cathode chamber, anode chamber and separation membrane positioned between the cathode chamber and anode chamber and using an aqueous sulfuric acid solution into which sulfurous acid gas is dissolved as a cathode solution and an aqueous sulfuric acid solution as an anode solution, wherein anode plate of the electrolytic cell used for electrolysis is lead or graphite, cathode plate is stainless steel or graphite, and current density is 10 to 200 mA/cm¬2, wherein 0.1 to 2.0 M of sulfuric acid solution saturated with sulfurous acid gas is used as the cathode solution, and wherein the sulfurous acid gas is consistently supplied into the cathode chamber from the outside during the process of performing electrolysis after injecting only the sulfuric acid solution as the cathode solution into the cathode chamber.
|
