Removal of two anionic reactive textile dyes by adsorption into MgAl-layered double hydroxide in aqueous solutions
2018
Boubakri, Saber | Djebbi, Mohamed Amine | Bouaziz, Zaineb | Namour, Philippe | Jaffrezic-Renault, Nicole | Amara, Abdesslem Ben Haj | Trabelsi-Ayadi, Malika | Ghorbel-Abid, Ibtissem | Kalfat, Rafik | Laboratoire des Applications de la Chimie aux Ressources et Substances Naturelles et à l'Environnement ; Université de Carthage (Tunisie) (UCAR) | Lab Mat Traitement & Anal ; Inst Natl Rech & Anal Physicochim | Institut National de Recherche et d'Analyse Physico-Chimique (INRAP) | Lab Phys Mat Lamellaires & Nanomat Hybrides (PMLNM) ; Université de Carthage (Tunisie) (UCAR) | ISA-Interfaces & biosensors - Interfaces & biocapteurs ; Institut des Sciences Analytiques (ISA) ; Université Claude Bernard Lyon 1 (UCBL) ; Université de Lyon-Université de Lyon-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL) ; Université de Lyon-Université de Lyon-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS) | RiverLy (UR Riverly) ; Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA) | Département de chimie (LPCM) ; Faculté des Sciences de Bizerte [Université de Carthage] ; Université de Carthage (Tunisie) (UCAR)-Université de Carthage (Tunisie) (UCAR) | Laboratoire de recherche Méthodes et Techniques d'Analyses [Ariana] (LMTA) ; Institut National de Recherche et d'Analyse Physico-chimique [Ariana, Tunisie] (INRAP)
[Departement_IRSTEA]Eaux [TR1_IRSTEA]BELCA [TR2_IRSTEA]ARCEAU
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Mostrar más [+] Menos [-]Inglés. extile dyes pose a significant challenge for water pollution due to the poor degradability of their complex aromatic structures (e.g., RR-120 and RBB-150). In order to minimize the harmful effects of RR-120 and RBB-150, the capacity of MgAl-layered double hydroxide for removing of these contaminants was studied herein. Batch adsorption experiments were conducted to investigate the effect of various operating parameters, such as solution pH, contact time, dye concentration, and temperature in order to provide optimal conditions for removal. Structural and morphological analyses were used to highlight the assembly and/or interaction LDH-dye. The state of equilibrium of RR-120 and RBB-150 adsorption was pH- and temperature-dependent and followed the pseudo-second-order rate model. Also, the equilibrium adsorption data of both dyes were found to adopt the Langmuir type isotherm model, which assumes a monolayer arrangement in LDH-dye. Furthermore, the effects of four major coexisting and competing mono- and divalent interlayer anions, such as NO3-, Cl-, CO32-, and SO42-, on the uptakes of RR-120 and RBB-150 were studied and the results showed that NO3- anions had insignificant effect on the uptakes of RR-120 and RBB-150 by MgAl. An equivalent study on the presence of both dyes in competitive trial adsorption/desorption from binary aqueous solution was investigated. And finally, the reuse operation of recovered material after dye adsorption was tested in up to 5 cycles of recyclability.
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