Titre :

Simultaneous removal of Cd, Co, Cu, Mn, Ni, and Zn from synthetic solutions on a hemp-based felt. II. Chemical modification

Auteur(s) :

Loiacono, Sonia [Auteur]
Crini, Grégorio [Auteur]
Martel, Bernard [Auteur]
Unité Matériaux et Transformations - UMR 8207 [UMET]
Chanet, Gilles [Auteur]
Cosentino, Cesare [Auteur]
Raschetti, Marina [Auteur]
Placet, Vincent [Auteur]
Torri, Giangiacomo [Auteur]
Morin-Crini, Nadia [Auteur]

Titre de la revue :

Journal of Applied Polymer Science

Numéro :

134

Pagination :

44422

Date de publication :

2017-12-15

Discipline(s) HAL :

Sciences de l'ingénieur [physics]/Matériaux
Sciences de l'ingénieur [physics]/Génie des procédés
Chimie/Matériaux
Chimie/Polymères

Résumé en anglais : [en]

In this study, we propose a chemical pretreatment to improve the performance of a hemp-based material in felt form used as an adsorbent for removing the metals from aqueous mixtures of Cd, Co, Cu, Mn, Ni, and Zn. The felt ...
Lire la suite >In this study, we propose a chemical pretreatment to improve the performance of a hemp-based material in felt form used as an adsorbent for removing the metals from aqueous mixtures of Cd, Co, Cu, Mn, Ni, and Zn. The felt was coated with a maltodextrin-1,2,3,4-butane tetracarboxylic polymer in order to provide ion-exchange properties to the material by introducing carboxylic groups. It was characterized by solid-state 13 C-NMR technique and by Energy-dispersive X-ray spectroscopy. This new adsorbent was then used in batch experiments and its performances were compared with those of non-modified hemp. Different controlling experimental conditions have been investigated. Modified hemp exhibited strong adsorption capacities due to a chemisorption mechanism (complexation, ion exchange): up to 25 mg/L (in reality, 150 mg of metals per L), all metals in the solution were removed. A modified hemp dosage of 1 g was able to remove 13.91 mg of metals in 100 mL of solution at a concentration of 25 mg/L for each metal, whereas non-modified hemp only removed 7.4 mg in the same experimental conditions. Adsorption of metals reached equilibrium in 60 min and the performances were pH-independent between 3 and 6, but dependent on the presence of NaCl, except for Cu.Lire moins >

Langue :

Anglais

Audience :

Internationale

Vulgarisation :

Non

Établissement(s) :

Université de Lille
ENSCL
CNRS
INRA

Collections :

• Unité Matériaux et Transformations (UMET) - UMR 8207

Équipe(s) de recherche :

Ingénierie des Systèmes Polymères

Date de dépôt :

2019-05-16T17:20:06Z
2024-07-09T11:27:18Z