Assessment of photo electro-Fenton and solar photo electro-Fenton processes for the efficient degradation of asulam herbicide

被引：7

作者：

Vigil-Castillo H.H. ^{[1
]}

Ruiz-Ruiz E.J. ^{[1
]}

López-Velázquez K. ^{[2
]}

Hinojosa-Reyes L. ^{[1
]}

Gaspar-Ramírez O. ^{[3
]}

Guzmán-Mar J.L. ^{[1
]}

机构：

[1] Universidad Autónoma de Nuevo León, UANL, Facultad de Ciencias Químicas, Av. Universidad S/N, Cd. Universitaria, Nuevo León, San Nicolás de Los Garza

[2] Universidad Politécnica de Tapachula, Carretera Tapachula - Puerto Madero, Km. 24 + 300, Chiapas, Tapachula

[3] Centro de Investigación y Asistencia en Tecnología y Diseño del Estado de Jalisco A.C., Sede Noreste, Vía de La Innovación 404, Autopista Monterrey-Aeropuerto Km 10, Parque, PIIT, Nuevo León, Apodaca

来源：

Chemosphere | 2023年 / 338卷

关键词：

Advanced oxidation processes; Emerging contaminants; Environmental pollution; Fenton reaction; Wastewater treatment;

D O I：

10.1016/j.chemosphere.2023.139585

中图分类号：

学科分类号：

摘要：

The degradation of asulam herbicide by photo electro-Fenton (PEF) and solar photo electro-Fenton (SPEF) processes was studied using an undivided electrochemical BDD/carbon-felt cell to generate H2O2 continuously. A central composite design combined with response surface methodology was applied to determine the optimal operating conditions of current intensity = 0.30 A, [Fe2+] = 0.3 mM, and [Na2SO4] = 0.11 M at pH 3 to achieve the complete degradation of asulam by electro-Fenton. Subsequently, the SPEF process was more efficient treatment compared to PEF, achieving a complete degradation of asulam and 98% of mineralization in 180 min. Moreover, 4-aminobenzenesulfonamide, 4-aminophenol, and 4-benzoquinone were detected as aromatic intermediates, whereas acetic acid, oxalic acid, and NO3− ions were identified as final degradation by-products. Thus, the SPEF process is an efficient alternative for the complete degradation and mineralization of herbicide asulam in an aqueous solution under natural sunlight. © 2023 Elsevier Ltd

引用

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