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Improving the Fenton process by visible LED irradiation.

Gema Pliego1, Patricia Garcia-Muñoz2, Juan A Zazo2

  • 1Ingenieria Quimica, Universidad Autonoma de Madrid, Crta. Colmenar km 15, 28049, Madrid, Spain. gema.pliego@uam.es.

Environmental Science and Pollution Research International
|September 11, 2016
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Summary

Visible light-emitting diode (LED) irradiation enhances Fenton oxidation efficiency for phenol degradation. This process achieves 95% mineralization by optimizing temperature, iron catalyst, and hydrogen peroxide levels.

Keywords:
Advanced oxidation processesFenton processPhenolVisible LED

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Area of Science:

  • Environmental Chemistry
  • Advanced Oxidation Processes

Background:

  • Fenton oxidation is a key process for degrading organic pollutants.
  • Optimizing reagent dosage and reaction conditions is crucial for efficiency and cost-effectiveness.

Purpose of the Study:

  • To investigate the impact of visible light-emitting diode (LED) irradiation on Fenton oxidation efficiency.
  • To determine optimal operating conditions for phenol degradation and mineralization.

Main Methods:

  • Phenol oxidation using Fenton process under varying temperatures and hydrogen peroxide (H2O2) doses.
  • Irradiation with visible LED light to assess its effect on the reaction kinetics and efficiency.
  • Analysis of degradation products and mineralization levels.

Main Results:

  • Complete phenol oxidation and oxalic acid degradation achieved at 50°C, 10 mg/L Fe2+, and 60% stoichiometric H2O2.
  • Up to 95% overall mineralization was observed.
  • LED irradiation significantly increased reaction rates and mineralization.

Conclusions:

  • Visible LED light irradiation substantially boosts Fenton oxidation efficiency for phenol removal.
  • Optimized conditions and LED enhancement enable high mineralization, reducing reagent consumption.