Development of novel composite materials based on kaolinitic clay modified with ZnO for the elimination of azo dyes by adsorption in water

Ngue Song, Pierre; Mahy, Julien; Farcy, Antoine; Calberg, Cédric; Fagel, Nathalie; Lambert, Stéphanie

doi:10.1016/j.rsurfi.2024.100255

Article (Scientific journals)

Development of novel composite materials based on kaolinitic clay modified with ZnO for the elimination of azo dyes by adsorption in water

Ngue Song, Pierre; Mahy, Julien; Farcy, Antoine et al.

2024 • In Results in Surfaces and Interfaces, 16, p. 100255

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https://hdl.handle.net/2268/320552

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10.1016/j.rsurfi.2024.100255

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Keywords :

water treatment; surface modification; adsorbent; natural material valorization; porous materials

Abstract :

[en] In this work, ZnO nanoparticles, synthesized by the sol-gel process, are immobilized on the external surface of raw kaolinite particles and kaolinite activated by different treatments: heat treatment at 600, 700 and 800 °C; treatment in a dimethyl sulfoxide (DMSO) medium; hot acid treatment (HCl, 6M) under reflux conditions or heat treatment at 800 °C followed by acid treatment. Characterization confirmed the successful immobilization of the nanocrystalline ZnO particles in the hexagonal structure of the different clay matrices. Measurement of the zeta potential showed a sudden inversion of the nature of the surface charge of certain composite materials obtained, through zeta potential values ranging from −31 mV before doping with ZnO to +36 mV after doping. The raw kaolinite and certain composites obtained were tested in batch mode for the adsorption in aqueous solution of three anionic azo textile dyes: a monozoic (Mordant Red 19, MR19), diazoic (Direct Blue 53, DB53) and a triazoic (Direct Green 1, DG1) dye. Compared to raw kaolinite, a linear and rapid increase in the quantity of dye adsorbed is observed during the first 5 min with retention rates around 95% for the best composite materials. The adsorption efficiency strongly depends on the zeta potential of the material: the higher the latter is towards positive values, the better the adsorption capacities of the samples towards these anionic textile dyes.

Disciplines :

Materials science & engineering
Chemical engineering

Author, co-author :

Ngue Song, Pierre ; Université de Liège - ULiège > Chemical engineering

Mahy, Julien ; Université de Liège - ULiège > Chemical engineering

Farcy, Antoine ; Université de Liège - ULiège > Chemical engineering

Calberg, Cédric ; Université de Liège - ULiège > Chemical engineering

Fagel, Nathalie ; Université de Liège - ULiège > Département de géologie > Argiles, géochimie et environnements sédimentaires

Lambert, Stéphanie ; Université de Liège - ULiège > Department of Chemical Engineering

Language :

English

Title :

Development of novel composite materials based on kaolinitic clay modified with ZnO for the elimination of azo dyes by adsorption in water

Publication date :

01 August 2024

Journal title :

Results in Surfaces and Interfaces

eISSN :

2666-8459

Publisher :

Elsevier, Netherlands

Volume :

Pages :

100255

Peer reviewed :

Peer Reviewed verified by ORBi

Available on ORBi :

since 11 July 2024

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