Le P. T., Le D. N., Nguyen T. H., Bui H. T., Pham L., Nguyen L. L., Nguyen Q. S., Nguyen T. P., Dang T. H., Duong T. T., Herrmann Marine, Ouillon Sylvain, Le T. P. Q., Vo D. L., Mai H., Dinh T. M. T. (2021). On the degradation of glyphosate by photocatalysis using TiO2/biochar composite obtained from the pyrolysis of rice husk. Water, 13 (23), p. 3326 [19 p.].
Titre du document
On the degradation of glyphosate by photocatalysis using TiO2/biochar composite obtained from the pyrolysis of rice husk
Année de publication
2021
Auteurs
Le P. T., Le D. N., Nguyen T. H., Bui H. T., Pham L., Nguyen L. L., Nguyen Q. S., Nguyen T. P., Dang T. H., Duong T. T., Herrmann Marine, Ouillon Sylvain, Le T. P. Q., Vo D. L., Mai H., Dinh T. M. T.
Source
Water, 2021,
13 (23), p. 3326 [19 p.]
In this study, titanium dioxide (TiO2) nanoparticles are immobilized onto rice husk biochar (RHB), as a porous support, for the photodegradation of glyphosate under UV light irradiation. The TiO2/RHB composites are prepared by pyrolysis and the sol-gel method. The SEM, XRD, EDX, and FT-IR results confirm the graphene structure of RHB and the formation of 10.61 nm TiO2 nanoparticles on the catalyst support. The effects of operating conditions, including catalyst dosage (3 g L-1, 5 g L-1, 10 g L-1, and 20 g L-1) and different illumination conditions (9 W lamp, 2 x 9 W lamps), on the removal of glyphosate from aqueous solutions were investigated. The photodegradation efficiency of 15 mg L-1 of commercial glyphosate was up to 99% after 5 h of irradiation at pH 3.0, with a TiO2/RHB dosage of 10 g L-1. However, the mineralization efficiency under this condition was lower than the decomposition efficiency of glyphosate, proving the partial degradation of glyphosate into AMPA and other metabolites after 5 h of reaction.
Plan de classement
Sciences fondamentales / Techniques d'analyse et de recherche [020]
;
Pollution [038]
;
Hydrologie [062]
Localisation
Fonds IRD [F B010083911]
Identifiant IRD
fdi:010083911
