RT journal article
T1 On the relevant role of iron complexation for the performance of photo-Fenton process at mild pH: Role of ring substitution in phenolic ligand and interaction with halides
A1 Vallés, Ivan
A1 Sciscenko, Iván
A1 Mora, Margarita
A1 Micó, Pau
A1 Amat, Ana M.
A1 Santos Juanes, Lucas
A1 Moreno Andrés, Javier
A1 Arques, Antonio
A2 Tecnologías del Medio Ambiente
K1 Chloride
K1 Fluoride
K1 Iron chelates
K1 Phenolic compounds
K1 Photo-Fenton
AB In this work, a systematic study on the effect of Fe(III) complexation by phenolic derivatives with different substitution on photo-Fenton has been carried out. Solutions containing a mixture of six pollutants (30 mg·L−1) were treated by solar simulated photo-Fenton ([Fe(II)] = 0.09 mmol·L−1, [H2O2] = 4.29 mmol·L−1, pH = 5, [Ligand] = 0.227 mmol·L−1. The efficiency of ligand increased with the presence of -OH groups (mainly in ortho- position), while the reverse was true for -COOH and -OCH3. This was correlated with the ability of the ligands to reduce Fe(III) to Fe(II). Catechol (CAT) supressed the interference of chlorides at [NaCl] = 30 mg/L−1 by complexing iron(III) thus preventing formation of FeCl2+, as 85% of Fe(III) was found as Fe(CAT)3 according to mathematical calculations. Hence, effluent matrix, including anions and organic pollutants, has a remarkable effect on iron speciation and a it should be considered when determining reaction conditions.
PB Elsevier
SN 0926-3373
YR 2023
FD 2023-03-31
LK http://hdl.handle.net/10498/29402
UL http://hdl.handle.net/10498/29402
LA eng
DS Repositorio Institucional de la Universidad de Cádiz
RD 11-nov-2026