Fe₂O₃-powder activated carbon/CaO₂ as an efficient hybrid process to remove a reactive dye from textile wastewater

Abstract

The application of two different processes simultaneously in a single reactor for the removal of persistent compounds from wastewater provides low investment cost, low treatment time, and synergistic pollutant removal. In this study, Magnetite-Powder Activated Carbon (M-AC) and Calcium Peroxide (CaO₂) were used simultaneously in an adsorption/oxidation hybrid process to remove Reactive Blue 21 (RB21) from simulated textile wastewater. M-AC can be separated for regeneration from the hybrid system by applying a magnetic field. CaO₂ is an eco-friendly, strong oxidant that can be used without any activator. Different amounts of M-AC and CaO₂ were used simultaneously in the hybrid process. The RB21 removal efficiency within 45 min was calculated as 99.44% with the simultaneous use of 0.04 g M-AC and 0.2 g CaO₂. It was found that the M-AC/CaO₂ hybrid system is an effective process to remove color from textile wastewater.

Keywords:

• Activated carbon
• adsorption
• calcium peroxide
• hybrid
• maghemite
• oxidation

Acknowledgment

The authors would like to thank Cukurova University for their support.

Disclosure statement

The authors declare that there are no conflicts of interest regarding the publication of this article.