Discussion on “Design of acid-geopolymers based on clays by-products for methylene blue removal from wastewater” [Applied Clay Science 245 (2023) 107126]

• Published in: Applied clay science Vol. 254; p. 107375
• Main Authors: Bollinger, Jean-Claude, Chu, Khim Hoong, Mouni, Lotfi, Salvestrini, Stefano
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 15.06.2024
• Subjects: Misconceptions; Modeling; Sorption isotherms; Sorption kinetics; Misconceptions; Sorption kinetics; Modeling; Sorption isotherms

The subject paper deals with the sorption of dyes (mainly methylene blue) on originally prepared geopolymers based on clay-rich wastes from the phosphate industry. However, the results of sorption experiments are marred by errors of interpretation that limit their validity. In particular, it is well...