Abstract
This study presents the removal of triarylmethane dye Bromocresol Green from aqueous solution by the electro-Fenton process. As catalysts five different cations were used: Fe2+, Ce3+, Ni2+, Mn2+, and Co2+. They play crucial role in the whole process because they react with H2O2 producing hydroxyl radicals that are capable of destruction of dye molecule. Based on this, a comparison of catalytic activity of these cations in the electro-Fenton process is made in the case of Bromocresol Green degradation. Simple and universal kinetic model is also applied to study the catalytic activity of investigated catalysts. Due to its multidimensionality it is fitted to experimental data using genetic algorithm. The procedure of fitting using genetic algorithm is thoroughly described and demonstrated. The activity of utilized catalysts is compared basing on both experimental and model data revealing that in the case of Bromocresol Green removal all alternative catalysts (Ni2+, Co2+, Ce3+, Mn2+) are better than the typical one (Fe2+, 51.83% degradation). The best catalyst is Co2+ with 78.35% degradation efficiency. Moreover, the adopted kinetic model proved its universality and outlined different interactions between catalysts and dye molecules.
The Kinetic Model for Decolourization of Commercial Direct Blue 2 Azo Dye Aqueous Solution by the Fenton Process and the Effect of Inorganic Salts
