Oxidation of 3,4-dihydroxybenzoic acid by means of hydrogen peroxide in aqueous goethite slurry.
The oxidation by H2O2 of 3,4-dihydroxybenzoic acid (3,4-DHB) in aqueous/goethite slurry at varying operating conditions (catalyst load, temperature, pH, substrate and hydrogen peroxide starting concentration) is investigated. At adopted catalyst loads the observed kinetic developments are consistent with a non-radicalic oxidation mechanism involving the interaction between hydrogen peroxide and 3,4-DHB acid both adsorbed on the active sites of the catalyst. The temperature dependence of rate parameters for the proposed model is also assessed.
Andreozzi
Roberto
R
Universita di Napoli Federico II Facolta di Ingegneria Chimica, Dipartmento di Ingegneria Chimica, Italy. andreo@irc.na.cnr.it
Caprio
Vincenzo
V
Marotta
Raffaele
R
D000327:Adsorption; D016588:Anticarcinogenic Agents / Q000737:chemistry*; D006861:Hydrogen Peroxide / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D062385:Hydroxybenzoates / Q000737:chemistry*; D007700:Kinetics; D016877:Oxidants / Q000737:chemistry*; D010084:Oxidation-Reduction; D013696:Temperature
D016588:Anticarcinogenic Agents; D062385:Hydroxybenzoates; D016877:Oxidants; C009091:protocatechuic acid; D006861:Hydrogen Peroxide