Catalytic Ozonation with Activated Carbon for Degradation of Polyacrylamide in Wastewater

Abstract

With the development of tertiary oil, the technology of polymer oil displacement has been widely used. The treatment of the oilfield wastewater become harder, owing to the extensive use of the polyacrylamide (PAM) in oil displacement. This experiment explored the modified activated carbon surface properties on the removal rate of PAM, under the conditions of the temperature 50 °C, the ozone concentration 5 L/min, the reaction time 1 h . The activated carbon(AC) was modified by copper, iron, nitrogen-containing compound. And the turbidity method was used to analyze the PAM concentration. The experimental results showed that the best modifier was ethylenediamine, which had less nitrogen; the optimum modification conditions of cupric nitrate were the calcination temperature 500 °C, maceration 15 mL; the optimum modification conditions of iron nitrate were the calcination temperature 550 °C, maceration 20 mL.