Degradation of aniline by the combined process of ultrasound and hydrogen peroxide (US/H2O2)

Somayeh Rahdar; Chinenye Adaobi Igwegbe; Mozhgan Ghasemi; Shahin Ahmadi

doi:10.1016/j.mex.2019.02.033

Degradation of aniline by the combined process of ultrasound and hydrogen peroxide (US/H₂O₂)

MethodsX. 2019 Mar 5:6:492-499. doi: 10.1016/j.mex.2019.02.033. eCollection 2019.

Authors

Somayeh Rahdar¹, Chinenye Adaobi Igwegbe², Mozhgan Ghasemi¹, Shahin Ahmadi¹

Affiliations

¹ Department of Environmental Health, Zabol University of Medical Sciences, Zabol, Iran.
² Department of Chemical Engineering, Nnamdi Azikiwe University, Awka, Nigeria.

Abstract

Aniline is an aromatic hydrocarbon discharged into the environment through certain industrial effluents, which thereby contaminate water resources. In this study, the performance of an oxidizing agent, hydrogen peroxide (H₂O₂) with ultrasound (US) for the removal of aniline from its aqueous solution was examined. The treatability of contaminated effluent using US/H₂O₂ with a frequency of 50 Hz for the treatment of aniline-contaminated water was investigated. The effects of operational parameters such as H₂O₂ concentration (0.01-0.07 mol/L), initial aniline concentration (20-120 mg/L), contact time (15-90 min) and pH (3-11) on the degradation of aniline was examined. Optimal H₂O₂ concentration, initial aniline concentration and contact time were obtained as 0.01 mol/L, 20 mg/L, and 45 min. The degradation process was more efficient at pH of 3. Removal efficiency of 95.91% was achieved at these optimum conditions. The results indicate that the combined US and H₂O₂ process at optimal conditions can be applied for the degradation of aniline with great efficiency.

Keywords: Aniline; Aqueous solutions; Degradation of aniline by the combined process of hydrogen peroxide and ultrasound; Hydrogen peroxide; Ultrasound; Water treatment.