Raw clays from Morocco for degradation of pollutants by Fenton-like reaction for water treatment

• Type: Article in International Scientific Journal
• Date: 2023

Authors

Assila, O (Author) Other; Bencheqroun, Z (Author) Other; Rombi, E (Author) Other; Valente, T (Author) Other; Braga, AS (Author) Other; Zaitan, H (Author) Other; Kherbeche, A (Author) Other; O.S.G.P. Soares (Author) FEUP; Pereira, MFR (Author) Other; Fonseca, AM (Author) Other; Parpot, P (Author) Other; Neves, IC (Author) Other

Journal

Title: Colloids and Surfaces A: Physicochemical and Engineering Aspects

Vol. 679

ISSN: 0927-7757

Publisher: Elsevier

Indexing

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Other information

Authenticus ID: P-00Z-A9K

DOI: 10.1016/j.colsurfa.2023.132630

Abstract (EN): Three raw clays from Morocco were used as heterogeneous catalysts for Fenton-like oxidation of organic pol-lutants in water. The selected pollutants were two dyes used in the textile industry, Congo Red (CR) and Tar-trazine (Tar, known also as a food coloring compound, E102) and Caffeine (Caf), a stimulant drug present in popular beverages such as coffee and tea, commonly used in Morocco. Two different processes were used for their degradation: (i) Fenton-like reaction; and (ii) electro-Fenton-like reaction. Process (i) was used for Tar and Caf degradation in the presence of clays from different region of Morocco (Middle Atlas -ClayMA, Fez -ClayF, and Ourika -ClayO), the best results being obtained with ClayO and ClayMA, on which 60.0% and 23.4% of conversion and 41.0% and 20.5% of mineralization were achieved for Tar and Caf, respectively. Process (ii) was used for degrading CR by clay-modified electrodes (CME) using the rawclays from Fez and Ourika regions (ClayF and ClayO). The stability of the CME was assessed by cyclic voltammetry studies, which proved that they are stable in the experimental conditions used. The electrodegradation of CR dye, performed without hydrogen peroxide in the reaction medium, achieve 67.0% of mineralization at the end of electrolysis (2 h).

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 12