Journal
JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
Volume 87, Issue 7, Pages 880-886Publisher
WILEY
DOI: 10.1002/jctb.2744
Keywords
Fe; activated carbon; catalytic wet hydrogen peroxide oxidation; Fenton reaction; phenol removal; heterogeneous catalysts
Categories
Funding
- Spanish 'Ministerio de Ciencia y Tecnologia'
- Comunidad de Madrid [S2009AMB-1588]
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BACKGROUND: Iron species were heterogeneously supported over activated carbons (AC) after different oxidizing pre-treatments. The influence of the oxidizing method on the iron yield and the physicochemical properties of the iron-containing activated carbons (Fe/AC) were studied. Thereafter, the activity and stability of Fe/AC catalysts for the wet peroxide oxidation of phenol as model pollutant was evaluated. RESULTS: The pre-oxidizing treatment with HNO3 was the most appropriate for iron incorporation, providing a Fe/AC catalyst with the highest TOC removal and oxidant efficiency. A high stability of the catalysts was observed with low values of iron leaching (below 1.5% of their initial iron contents). The best Fe/AC catalyst was studied at different reaction temperatures and initial phenol concentrations. CONCLUSION: The promising results for the Fe/AC catalyst using HNO3 pre-oxidizing treatment lay in the remarkable adsorption capacity of the carbon matrix and the potential activity of the iron species as Fenton-like catalyst for the generation of oxidizing hydroxyl radicals. Copyright (c)proves 2012 Society of Chemical Industry
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