Removal of Diclofenac in Wastewater Using Calcium Peroxide as a Catalyst in Ozonation Process

EasyChair Preprint 9546

Abstract

Diclofenac (DCF) is widely used as an anti-inflammatory drug. Contaminations of DCF in environment cause harmful effects to some organisms in aquatic ecosystem. Therefore, it is necessary to be properly treated before being release into the environment. This research studied the removal efficiencies of DCF contaminated in synthetic wastewater by catalytic ozonation using calcium peroxide (CaO₂) as a catalyst. Factors affecting the removal efficiency, including, ozone dosage, initial concentration of DCF, solution pH and CaO₂ dosage were investigated. The results showed that the increase of O₃ dosage, pH, reaction time and catalyst dosage increased the DCF removal efficiencies. On the other hand, the increase of DCF concentration reduced the DCF removal efficiency. At optimum condition, i.e. ozone dosage of 95 mg/hr., initial concentration of 30 mg/L., solution pH of 7, and CaO₂ dosage of 1 g/L., the removal efficiency of DCF was 77.95% at the reaction time of 120 min. Kinetic study revealed that DCF degradation by ozonation and catalytic ozonation followed the patterns of first-order kinetic with reaction rate constants (k) of 0.0095 and 0.0137 min^-1, respectively.

Keyphrases: กระบวนการโอโซเนชันที่มีตัวเร่งปฏิกิริยา, แคลเซียมเปอร์ออกไซด์, ไดโคลฟีแนค

@booklet{EasyChair:9546,
  author    = {Papitchaya Chookaew and Chalor Jarusutthirak},
  title     = {Removal of Diclofenac in Wastewater Using Calcium Peroxide as a Catalyst in Ozonation Process},
  howpublished = {EasyChair Preprint 9546},
  year      = {EasyChair, 2023}}