Degradation of phthalic acid by anodic oxidation in acidic aqueous solutions with high chromium content using boron-doped diamond anode
Gözmen, Belgin
Mineralization of phthalic acid, a highly refractory organic pollutant was studied by an anodic oxidation process with boron-doped diamond (BDD) anode in a highly acidic chromium medium. Synthetic solutions were composed of Cr(III)/Cr(VI), sulfate, sulfuric acid, and phthalic acid (initial form potassium hydrogen phthalate, KHP). Degradation/mineralization of KHP was carried out by hydroxyl radicals produced on the anode and sulfate radicals generated from the sulfate ions present in the medium. To find appropriate operating conditions, the effects of cathode type, current density, electrolysis time, and presence of Cr(VI)-Cr(III) were investigated. Thereafter, the effect of current density, amount of Cr(VI)-Cr(III) in solution, and electrolysis time on KHP mineralization was realized by u...
