Publicaciones

The leather industry produces tons of solid waste containing significant amounts of chromium. Without any safe deposition, these can potentially pollute the environment. This article develops an electrochemical method to remove chromium and separate collagen from wet blue chromium shaving (WBCS). The raw WBCS had an initial content of 28.5 g Cr3+/Kg. The process was carried out in a three-compartment electrochemical reactor assembled with cationic membranes, using graphite and titanium as...

The catalytic wet air oxidation (CWAO) of methyl and dimethylamines was studied. A commercial peach stones activated carbon and its oxidized and reduced forms were used as catalysts. The observed catalytic behavior is related to the presence of oxygenated surface functional groups on the activated carbons. The N-compounds were selectively oxidized to nitrogen, water and carbon dioxide using these activated carbon catalysts. It is proposed that the quinonic surface groups are...

The oxidation of aqueous ammonia to nitrogen by the catalytic wet air oxidation (CWAO) process with activated carbon as catalyst was studied. A commercial activated carbon CUDU1000 chemically modified by oxidation with HNO3 and/or reduction with H2 was used. The characterization of the activated carbons was carried out by N2 adsorption, thermal programmed decomposition (TPD), Fourier transformed infrared (FTIR) spectroscopy, Boehm titration and zero point charge (ZPC) techniques. Studies of...