RT Journal Article
T1 Application of deep eutectic solvents (DES) for the synthesis of iron heterogeneous catalyst: application to sulfamethoxazole degradation by advanced oxidation processes
A1 Puga Pazo, Antón
A1 Rosales Villanueva, Emilio
A1 Pazos Currás, Marta María
A1 Sanromán Braga, María Ángeles
K1 3308.11 Control de la Contaminación del Agua
K1 3303.03 Procesos Químicos
K1 2391 Química Ambiental
AB The development of novel approaches to the remotion of pharmaceuticals in wastewater is a subject of concern due to their effect on living beings and the environment. Advanced oxidation processes and the use of relevant catalysts are feasible treatment alternatives that require further development. The development of suitable heterogeneous catalysts is a necessity. This work proposes the synthesis of an iron catalyst in a deep eutectic solvent (Fe-DES) composed of choline chloride and citric acid, which was physically and chemically characterized using SEM-EDS and TEM, FTIR, RAMAN, XRD and XPS. The characterisation confirmed the presence of iron in the form of hematite. Fe-DES was shown to be a multipurpose catalyst that can be applied in the removal of sulfamethoxazole as a reagent in the Fenton and electro-Fenton processes and as an activator of peroxymonosulfate (PMS) processes. After testing the catalyst with the aforementioned techniques, the best result was achieved by combining these processes in an electro-PMS, with great efficiency achieved by dual activation of the PMS with the catalyst and electric field, attaining total elimination at natural pH in 90 min. Furthermore, the degradation was confirmed by the detection of short-chain carboxylic acids (oxalic, succinic, and acetic) and reduction in toxicity values. These results confirm the suitability of Fe-DES to degrade high-priority pharmaceutical compounds.
PB Catalysts
SN 20734344
YR 2023
FD 2023-03-30
LK http://hdl.handle.net/11093/4767
UL http://hdl.handle.net/11093/4767
LA eng
NO Catalysts, 13(4): 679 (2023)
NO Xunta de Galicia y FEDER | Ref. ED431C 2021-43
DS Investigo
RD 13-oct-2024