Degradation Of Typical PPCPs By Fenton-like Process In Conjunction With Ultrasonic Cavitation

As an emerging micro pollutants, pharmaceuticals and personal care products (PPCPs) has potential hazard, especially for the ecological environment and human health. In oder to pursued effective treatment technology, many researchers began to explore the migration and transformation mechanism. This paper used ultrasonic cavitation in conjunction with Fenton-like system (US/H2O2/SPI) and Mn(II) catalytic ozonation system (US/O3/Mn) to degrade simulation wastewater of acetaminophen (ACT). Method of single factor experiment, contrast experiment and response surface optimization were used to explore the influence factors of ACT. Optimum reaction conditions and the effect of TOC were determined by this paper. Principal conclusions of this paper are as follows:ACT was degraded effectively by US/H2O2/SPI system, using orthogonal test and response surface method to determine the optimal degradation conditions. Conditions were as follows:pH 3, hydrogen peroxide and sponge iron concentrations were 6.97 mmol/L and 5.80 g/L. Under these conditions, degradation rate of ACT could reach 98.97% after 60 min, the removal of TOC was 36%. Chloramphenicol and caffeine were also degraded by this system, degradation rates were 91.97% and 88.93%, the removal of TOC was 19.92% and 41.55%.ACT was degraded effectively by US/03/Mn system, This paper investigates pH value, ozone flux and concentration of Mn (â…¡). Results showed that Mn(â…¡) could improve 15% degradation rate. When pH 3.0, degradation rate of ACT could reach 100% when ozone flux and Mn (â…¡) concentration were 200 mL/min and 4 mmol/L after 50 min, removal rate of TOC is 19.54%. Iron manganese catalyst had good catalytic effect which degradation rate constant was 0.787. This system applied to chloramphenicol and caffeine, degradation rates were 60.41% and 100%, tthe removal of TOC was 19.92% and 41.55%.