Article (Scientific journals)
Thermodynamics and kinetics of the removal of methylene blue from aqueous solution by raw kaolin
Harrou, Achraf; Gharibi, Elkhadir; Nasri, Hicham et al.
2020In SN Applied Sciences, 2 (277)
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Keywords :
Kaolin; halloysite; kaolinite; illite; kinetic; clay; Remediation of contaminated water; organic dyes; Morocco; low-cost and eco-environmentally friendly adsorbent; methylene blue
Abstract :
[en] Remediation of contaminated water with organic dyes originated from variety of industrial processes deserves increased attention. Raw clay is an effective low-cost and eco-environmentally friendly adsorbent for the removal of methylene blue (MB) from solution. This study aims to determine kinetics and thermodynamics of MB adsorption onto raw kaolin clays (halloysite and kaolinite/illite) from northeast of Morocco. The apportion capacity of the two kaolin clays to adsorb the MB dye by varying temperature and pH conditions was studied. The thermodynamic parameters show that the sorption of MB is spontaneous and endothermic for halloysite-rich clay, whereas adsorption onto kaolinite/illite is inhibited by electrostatic exothermic effects and the sorption is thermodynamically unfavorable. The kinetic study showed that the adsorption capacity of MB on halloysite is greater than on kaolinite. The intraparticle diffusion process controls the adsorption reaction, and the kinetic is more important for halloysite.
Disciplines :
Chemistry
Earth sciences & physical geography
Author, co-author :
Harrou, Achraf
Gharibi, Elkhadir
Nasri, Hicham
El Ouahabi, Meriam  ;  Université de Liège - ULiège > Département de géographie > Géomorphologie et Géologie du Quaternaire
Language :
English
Title :
Thermodynamics and kinetics of the removal of methylene blue from aqueous solution by raw kaolin
Publication date :
January 2020
Journal title :
SN Applied Sciences
eISSN :
2523-3971
Publisher :
Springer Nature, Cham, Switzerland
Volume :
2
Issue :
277
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 28 January 2020

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