TY - JOUR
T1 - A solar photoFenton process with calcium peroxide from eggshell and ferrioxalate complexes for the degradation of the commercial herbicide 2,4-D in water
AU - Girón-Navarro, Rocío
AU - Martínez-Miranda, Verónica
AU - Teutli-Sequeira, Elia Alejandra
AU - Linares-Hernández, Ivonne
AU - Martínez-Cienfuegos, Iván Galileo
AU - Sánchez-Pozos, Miriam
AU - Santoyo-Tepole, Fortunata
N1 - Publisher Copyright:
© 2023 Elsevier B.V.
PY - 2023/4/1
Y1 - 2023/4/1
N2 - The present study focused on the degradation of the commercial herbicide 2,4-D in water by solar photoFenton assisted with ferrioxalate complex and calcium peroxide (CaO2), using an experimental system consisting of a storage tank, a water pump, a solar reactor, and a compound parabolic concentrator (CPC), which collected solar energy of 212.102 kJ/L. The CaO2 was synthesized from eggshells, the influence of the 2,4-D concentration, oxalic acid (H2C2O4), iron (Fe3+), and CaO2 on the degradation of herbicide was evaluated by HPLC, and the intermediates such as 2,4-dichlorophenol, 1,4-benzoquinone, and oxalic acid were determined to confirm the proposed reaction mechanism. The generation of hydroxyl radicals and other reactive species, depends on the molar ratios of oxalate/Fe3+, CaO2/Fe3+, and CaO2/2,4-D. The optimum concentrations for 100 % degradation were 61.5 mg/L 2,4-D, 50.5 mg/L Fe3+, 100.5 mg/L H2C2O4, and 81 mg/L CaO2 with 42.27 % COD and 44.09 % TOC. This study highlights the viability of the solar photoFenton process to degrade the 2,4-D herbicide and aims to promote: the recovery of organic waste such as eggshells, the complexing effect of H2C2O4-Fe3+, the CaO2 as an alternative oxidant, and the application of renewable energy in the treatment of similar contaminants present in wastewater for future research.
AB - The present study focused on the degradation of the commercial herbicide 2,4-D in water by solar photoFenton assisted with ferrioxalate complex and calcium peroxide (CaO2), using an experimental system consisting of a storage tank, a water pump, a solar reactor, and a compound parabolic concentrator (CPC), which collected solar energy of 212.102 kJ/L. The CaO2 was synthesized from eggshells, the influence of the 2,4-D concentration, oxalic acid (H2C2O4), iron (Fe3+), and CaO2 on the degradation of herbicide was evaluated by HPLC, and the intermediates such as 2,4-dichlorophenol, 1,4-benzoquinone, and oxalic acid were determined to confirm the proposed reaction mechanism. The generation of hydroxyl radicals and other reactive species, depends on the molar ratios of oxalate/Fe3+, CaO2/Fe3+, and CaO2/2,4-D. The optimum concentrations for 100 % degradation were 61.5 mg/L 2,4-D, 50.5 mg/L Fe3+, 100.5 mg/L H2C2O4, and 81 mg/L CaO2 with 42.27 % COD and 44.09 % TOC. This study highlights the viability of the solar photoFenton process to degrade the 2,4-D herbicide and aims to promote: the recovery of organic waste such as eggshells, the complexing effect of H2C2O4-Fe3+, the CaO2 as an alternative oxidant, and the application of renewable energy in the treatment of similar contaminants present in wastewater for future research.
KW - Compound parabolic concentrator
KW - Degradation
KW - Eggshell
KW - Hierbamine
KW - POA
KW - Water treatment
UR - http://www.scopus.com/inward/record.url?scp=85146941474&partnerID=8YFLogxK
U2 - 10.1016/j.jphotochem.2023.114550
DO - 10.1016/j.jphotochem.2023.114550
M3 - Artículo
AN - SCOPUS:85146941474
SN - 1010-6030
VL - 438
JO - Journal of Photochemistry and Photobiology A: Chemistry
JF - Journal of Photochemistry and Photobiology A: Chemistry
M1 - 114550
ER -