Activated carbon as catalyst for microwave-assisted wet peroxide oxidation of aromatic hydrocarbons New Challenges in the Application of Advanced Oxidation Processes First Online: 21 May 2018 Abstract
This paper addresses the removal of four aromatic hydrocarbons typically found in petrochemical wastewater: benzene (
B), toluene ( T), o-xylene ( X), and naphthalene ( N), by microwave-assisted catalytic wet peroxide oxidation (MW-CWPO) using activated carbon (AC) as catalyst. Under the studied conditions, complete pollutant elimination ( B, 1.28 mM; T, 1.09 mM; X, 0.94 mM; and N, 0.78 mM) was achieved, with more than 90% TOC removal after only 15-min reaction time, working at 120 °C, pH 0 = 3, AC at 1 g L −1, and H 2O 2 at the stoichiometric dose. Furthermore, in the case of toluene, naphthalene, and xylene, the hydroxylation and breakdown of the ring is very rapid and toxic intermediates were not detected. The process follows two steps: (i) pollutant adsorption onto AC followed by (ii) adsorbed compounds oxidation. Thus, MW-CWPO with AC as catalyst appears a promising way for a fast and effective process for B, T, X, and N removal in aqueous phase. Keywords Microwave CWPO Activated carbon BTXN Mineralization AOP
Responsible editor: Vítor Pais Vilar
Electronic supplementary material
The online version of this article (
) contains supplementary material, which is available to authorized users. https://doi.org/10.1007/s11356-018-2291-9 Notes Funding information
Authors would like to thank the Spanish
Ministerio de Economía y Competitividad (MINECO) for financial support through project CTM2016-76454-R. A.L. Garcia-Costa acknowledges the European Social Fund and MINECO for PhD grant BES-2014-067598. References
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