Degradation of diazinon from aqueous solutions by electro-Fenton process: effect of operating parameters, intermediate identification, degradation pathway, and optimization using response surface methodology (RSM)

• Published in: Separation science and technology Vol. 56; no. 13; pp. 2287 - 2299
• Main Authors: heidari, Maryam, Vosoughi, Mehdi, Sadeghi, Hadi, Dargahi, Abdollah, Mokhtari, S. Ahmad
• Format: Journal Article
• Language: English
• Published: Abingdon Taylor & Francis 02.09.2021; Taylor & Francis Ltd
• Subjects: Adequacy; advanced oxidation; Aqueous solutions; Correlation coefficient; Correlation coefficients; Current density; Degradation; Diazinon; Electro-Fenton process; Fungicides; Hydrogen peroxide; Insecticides; Mathematical models; Optimization; Parameter identification; Parameters; Pesticides; Process parameters; Regression analysis; Response surface methodology; Statistical analysis
• ISSN: 0149-6395; 1520-5754
• DOI: 10.1080/01496395.2020.1821060

In this experimental study, the statistical response surface methodology (RSM) based Box-Behnken design (BBD) was selected for evaluation of the effect of different parameters (solution pH,H 2 O 2 concentration, current density, and time) and their interactions on the degradation of the diazinon by electro Fenton process. The results showed that the quadratic model is suitable for the obtained data (P-value = 0.0001) and in optimal process performance conditions was set equal to 100%. Regression analysis with a high correlation coefficient (R 2  = 0.9980) and the model value of 765.56 indicated the adequacy of the model. Based on the results, the electro-Fenton process is an efficient technique for removing diazinon from aqueous media.