Single-step and two-step syntheses of magnetic carbons from coffee residue: elimination of sulfamethazine by adsorption

Autor: Khenniche, L., Souleymane, M. Saidou, Chemache, Z., Benissad-Aissani, F., Amrane, A.
Přispěvatelé: Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES), Université Abderrahmane Mira [Béjaïa], Institut des Sciences Chimiques de Rennes (ISCR), Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Ecole Nationale Supérieure de Chimie de Rennes (ENSCR)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)
Rok vydání: 2022
Předmět:
Zdroj: International Journal of Environmental Science and Technology
International Journal of Environmental Science and Technology, 2023, 20 (1), pp.755-768. ⟨10.1007/s13762-022-04116-9⟩
International Journal of Environmental Science and Technology, 2023, 20, pp.755-768. ⟨10.1007/s13762-022-04116-9⟩
ISSN: 1735-2630
1735-1472
Popis: International audience; The magnetization process of activated carbons prepared from coffee residue was performed according to two protocols: The first one involved a chemical impregnation with a mixture of two salts: FeSO4 center dot 7H(2)O and FeCl3, followed by a treatment with NaOH (2 M). The second procedure required an impregnation with both salts mentioned above, taken alone or in mixture, followed by a pyrolysis at 600 degrees C during an hour. A commercial activated carbon treated in the same way was used as reference. Physicochemical analysis of all materials revealed that activated carbon treated with iron sulfate (FeSO4 center dot 7H(2)O) alone contains magnetite; activated carbon prepared with iron chloride (FeCl3) alone contains magnetite, while activated carbon prepared with a combination of both salts contains magnetite and maghemite. Adsorption tests for the sulfamethazine removal from the aqueous phase were carried out at pH = 6 and pH = 4. Magnetized carbon prepared with an impregnation ratio of 75% iron sulfate followed by pyrolysis gave the most effective performance with an elimination efficiency of 64.12% of sulfamethazine.
Databáze: OpenAIRE
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