2026-06-30T03:13:13Zhttps://docta.ucm.es/rest/oai/request

oai:docta.ucm.es:20.500.14352/1213012025-06-13T23:57:22Zcom_20.500.14352_14col_20.500.14352_15

Removal of antracene and benzo[a]pyrene from soil-washing synthetic emulsions by Fenton and solar photo-Fenton oxidation Ayedi, Karima Moreno De La Fuente, Yaiza Herraiz Carboné, Miguel Cotillas Soriano, Salvador Prisciandaro, Marina Santos López, Aurora Domínguez Torre, Carmen María This study examines the treatment of polycyclic aromatic hydrocarbons (PAHs) aqueous emulsions, equivalent to those obtained from soil-washing, using Fenton and solar photo-Fenton oxidation for pollutant removal and surfactant recovery in water treatment applications. PAHs, persistent contaminants in industrial wastewater, require sustainable treatment approaches. Soil was contaminated with anthracene (ANT) and benzo[a]pyrene (BaP) and washed with sodium dodecyl sulfate (SDS) at a mass liquid-to-soil ratio of 2:1, with SDS concentrations ranging from 2500 to 10,000 mg L−1. A synthetic emulsion (SDS: 4500 mg L−1, ANT: 5 mg L−1, BaP: 5 mg L−1) was prepared and treated using low oxidant (H₂O₂: 60–240 mg L−1) and catalyst (Fe: 2.5–10 mg L−1) dosages to optimize reagent consumption. The Fenton process (pH = 3) achieved complete PAHs removal, with BaP fully degraded under all conditions and ANT requiring higher oxidant (H₂O₂, 240 mg L−1) and catalyst (Fe, 10 mg L−1) concentrations. The solar photo-Fenton process achieved up to 70 % ANT and 85 % BaP removal at near-neutral pH using ferrioxalate complexes (120 mg L−1 H2O2, 10 mg L−1 Fe). Minimal SDS degradation and negligible mineralization support surfactant recovery and reuse, enhancing process sustainability. These findings highlight the viability of light-assisted advanced oxidation processes for selective pollutant degradation in engineered water systems, supporting the development of cost-effective and environmentally friendly remediation technologies. 2025-06-13T09:01:49Z 2025-06-13T09:01:49Z 2025-06-13T09:01:49Z 2025-06 journal article https://hdl.handle.net/20.500.14352/121301 2214-7144 10.1016/j.jwpe.2025.107959 eng PID2022-137828OB-I00 (EMULREM) PDC2022-133095-I00 (VAL-REMSURFOX) TEC-2024/ECO-69 (CARESOIL-CM) PREP2022-000074 MICIU/AEI/10.13039/501100011033 Ayedi, K.; Moreno-De La Fuente, Y.; Herraiz-Carboné, M.; Cotillas, S.; Prisciandaro, M.; Santos, A.; Domínguez, C. M. Removal of Antracene and Benzo[a]Pyrene from Soil-Washing Synthetic Emulsions by Fenton and Solar Photo-Fenton Oxidation. Journal of Water Process Engineering 2025, 75, 107959. https://doi.org/10.1016/j.jwpe.2025.107959. http://creativecommons.org/licenses/by-nc-nd/4.0/ open access Attribution-NonCommercial-NoDerivatives 4.0 International Elsevier