Comparative Degradation of Alachlor Using Photocatalysis and Photo-Fenton

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

Research output: Contribution to journalArticleResearchpeer-review

1 Citation (Scopus)

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.

Original languageEnglish
Article number346
JournalWater, Air, and Soil Pollution
Volume229
Issue number11
DOIs
StatePublished - 1 Nov 2018

Fingerprint

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

Keywords

  • Advanced oxidation processes
  • Alachlor
  • Pesticides
  • Photo-Fenton
  • Photocatalysis
  • Wastewater treatment

Cite this

Pérez, Margarita Hincapié ; Vega, Lina Patricia ; Zúñiga-Benítez, Henry ; Peñuela, Gustavo A. / Comparative Degradation of Alachlor Using Photocatalysis and Photo-Fenton. In: Water, Air, and Soil Pollution. 2018 ; Vol. 229, No. 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.

In: Water, Air, and Soil Pollution, Vol. 229, No. 11, 346, 01.11.2018.

Research output: Contribution to journalArticleResearchpeer-review

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

JF - Water, Air, and Soil Pollution

SN - 0049-6979

IS - 11

M1 - 346

ER -