Comparative Degradation of Alachlor Using Photocatalysis and Photo-Fenton

Margarita Hincapié Pérez, Lina Patricia Vega, Henry Zúñiga-Benítez, Gustavo A. Peñuela

Resultado de la investigación: Contribución a una revistaArtículoInvestigaciónrevisión exhaustiva

Resumen

A comparative study about the degradation of alachlor in aqueous solutions under different photocatalytic systems, including TiO2, TiO2/H2O2, and TiO2/Na2S2O8 heterogeneous photocatalysis, Fe2+/H2O2, Fe3+/H2O2, and UV radiation, was carried out. In this way, times for alachlor total removal and mineralization followed the order photo-Fenton < photocatalysis with persulfate < photo-Fenton-like < photocatalysis with hydrogen peroxide < photocatalysis with TiO2. Ferric chloride was used as ferric ion source under Fenton-like reactions. Oxidation with Fe2+/H2O2 was faster than treatment with Fe3+/H2O2, but under UV irradiation, degradation rates were similar, indicating that FeCl3 could be a good source of ferric ions for alachlor degradation. Reduction of the sample toxicity was much faster in the photo-Fenton process than in TiO2 process (50% mortality reduction in 180 min compared to around 400 min—Daphnia Pullex assays). In addition, evaluation of the nitrogen and chloride contained in the treated samples confirmed a 100% conversion of the N and Cl content in the pollutant molecule. Finally, some of the degradation by-products for pollutant removal using TiO2 photocatalysis were identified.

IdiomaInglés
Número de artículo346
PublicaciónWater, Air, and Soil Pollution
Volumen229
Número de edición11
DOI
EstadoPublicada - 1 nov 2018

Huella dactilar

alachlor
Photocatalysis
Degradation
degradation
chloride
pollutant removal
ion
hydrogen peroxide
Ion sources
comparative study
irradiation
aqueous solution
Hydrogen peroxide
Ultraviolet radiation
Hydrogen Peroxide
assay
Byproducts
Toxicity
mineralization
toxicity

Palabras clave

    Citar esto

    Pérez, Margarita Hincapié ; Vega, Lina Patricia ; Zúñiga-Benítez, Henry ; Peñuela, Gustavo A. / Comparative Degradation of Alachlor Using Photocatalysis and Photo-Fenton. En: Water, Air, and Soil Pollution. 2018 ; Vol. 229, N.º 11.
    @article{14df406f147c42e69440c3b17227ee64,
    title = "Comparative Degradation of Alachlor Using Photocatalysis and Photo-Fenton",
    abstract = "A comparative study about the degradation of alachlor in aqueous solutions under different photocatalytic systems, including TiO2, TiO2/H2O2, and TiO2/Na2S2O8 heterogeneous photocatalysis, Fe2+/H2O2, Fe3+/H2O2, and UV radiation, was carried out. In this way, times for alachlor total removal and mineralization followed the order photo-Fenton < photocatalysis with persulfate < photo-Fenton-like < photocatalysis with hydrogen peroxide < photocatalysis with TiO2. Ferric chloride was used as ferric ion source under Fenton-like reactions. Oxidation with Fe2+/H2O2 was faster than treatment with Fe3+/H2O2, but under UV irradiation, degradation rates were similar, indicating that FeCl3 could be a good source of ferric ions for alachlor degradation. Reduction of the sample toxicity was much faster in the photo-Fenton process than in TiO2 process (50{\%} mortality reduction in 180 min compared to around 400 min—Daphnia Pullex assays). In addition, evaluation of the nitrogen and chloride contained in the treated samples confirmed a 100{\%} conversion of the N and Cl content in the pollutant molecule. Finally, some of the degradation by-products for pollutant removal using TiO2 photocatalysis were identified.",
    keywords = "Advanced oxidation processes, Alachlor, Pesticides, Photo-Fenton, Photocatalysis, Wastewater treatment",
    author = "P{\'e}rez, {Margarita Hincapi{\'e}} and Vega, {Lina Patricia} and Henry Z{\'u}{\~n}iga-Ben{\'i}tez and Pe{\~n}uela, {Gustavo A.}",
    year = "2018",
    month = "11",
    day = "1",
    doi = "10.1007/s11270-018-3996-6",
    language = "Ingl{\'e}s",
    volume = "229",
    journal = "Water, Air, and Soil Pollution",
    issn = "0049-6979",
    publisher = "Springer Netherlands",
    number = "11",

    }

    Comparative Degradation of Alachlor Using Photocatalysis and Photo-Fenton. / Pérez, Margarita Hincapié; Vega, Lina Patricia; Zúñiga-Benítez, Henry; Peñuela, Gustavo A.

    En: Water, Air, and Soil Pollution, Vol. 229, N.º 11, 346, 01.11.2018.

    Resultado de la investigación: Contribución a una revistaArtículoInvestigaciónrevisión exhaustiva

    TY - JOUR

    T1 - Comparative Degradation of Alachlor Using Photocatalysis and Photo-Fenton

    AU - Pérez, Margarita Hincapié

    AU - Vega, Lina Patricia

    AU - Zúñiga-Benítez, Henry

    AU - Peñuela, Gustavo A.

    PY - 2018/11/1

    Y1 - 2018/11/1

    N2 - A comparative study about the degradation of alachlor in aqueous solutions under different photocatalytic systems, including TiO2, TiO2/H2O2, and TiO2/Na2S2O8 heterogeneous photocatalysis, Fe2+/H2O2, Fe3+/H2O2, and UV radiation, was carried out. In this way, times for alachlor total removal and mineralization followed the order photo-Fenton < photocatalysis with persulfate < photo-Fenton-like < photocatalysis with hydrogen peroxide < photocatalysis with TiO2. Ferric chloride was used as ferric ion source under Fenton-like reactions. Oxidation with Fe2+/H2O2 was faster than treatment with Fe3+/H2O2, but under UV irradiation, degradation rates were similar, indicating that FeCl3 could be a good source of ferric ions for alachlor degradation. Reduction of the sample toxicity was much faster in the photo-Fenton process than in TiO2 process (50% mortality reduction in 180 min compared to around 400 min—Daphnia Pullex assays). In addition, evaluation of the nitrogen and chloride contained in the treated samples confirmed a 100% conversion of the N and Cl content in the pollutant molecule. Finally, some of the degradation by-products for pollutant removal using TiO2 photocatalysis were identified.

    AB - A comparative study about the degradation of alachlor in aqueous solutions under different photocatalytic systems, including TiO2, TiO2/H2O2, and TiO2/Na2S2O8 heterogeneous photocatalysis, Fe2+/H2O2, Fe3+/H2O2, and UV radiation, was carried out. In this way, times for alachlor total removal and mineralization followed the order photo-Fenton < photocatalysis with persulfate < photo-Fenton-like < photocatalysis with hydrogen peroxide < photocatalysis with TiO2. Ferric chloride was used as ferric ion source under Fenton-like reactions. Oxidation with Fe2+/H2O2 was faster than treatment with Fe3+/H2O2, but under UV irradiation, degradation rates were similar, indicating that FeCl3 could be a good source of ferric ions for alachlor degradation. Reduction of the sample toxicity was much faster in the photo-Fenton process than in TiO2 process (50% mortality reduction in 180 min compared to around 400 min—Daphnia Pullex assays). In addition, evaluation of the nitrogen and chloride contained in the treated samples confirmed a 100% conversion of the N and Cl content in the pollutant molecule. Finally, some of the degradation by-products for pollutant removal using TiO2 photocatalysis were identified.

    KW - Advanced oxidation processes

    KW - Alachlor

    KW - Pesticides

    KW - Photo-Fenton

    KW - Photocatalysis

    KW - Wastewater treatment

    UR - http://www.scopus.com/inward/record.url?scp=85055754808&partnerID=8YFLogxK

    U2 - 10.1007/s11270-018-3996-6

    DO - 10.1007/s11270-018-3996-6

    M3 - Artículo

    VL - 229

    JO - Water, Air, and Soil Pollution

    T2 - Water, Air, and Soil Pollution

    JF - Water, Air, and Soil Pollution

    SN - 0049-6979

    IS - 11

    M1 - 346

    ER -