Degradation of Low Concentration Chloroquine Phosphate by Ozone Oxidation

Abstract

In this study, the degradation of low-concentration chloroquine phosphate (CQP, 0.1 mg/L) by ozone oxidation technology was studied systematically by investigating the effects of different factors, including pH (3.0-11.0), temperature (10-40°C) and ozone dosage (0.048-0.384 mg/L). In addition, the toxicity was also investigated about its variation and controlling effect. The experimental results showed that as the solution pH was 7.0, the temperature was 30°C, and the ozone dosage was 0.192 mg/L, CQP could be completely degraded. The toxicity of the water sample rapidly increased at the initial stage of the reactions. As CQP was deeply degraded, the toxicity was effectively controlled. In addition, the toxicity was controlled faster and more significantly by increasing the ozone dosage. When the dosage of ozone was 0.384 mg/L, the toxicity could be fully controlled within 40 min, which could meet the emission standards.