Photo-Fenton process for the degradation of Tartrazine (E102) in aqueous medium

• Published in: Journal of the Taiwan Institute of Chemical Engineers 2013-11, Vol.44 (6), p.990-994
• Main Authors: Oancea, Petruta, Meltzer, Viorica
• Format: Article
• Language: English
• Subjects: AOP; Dyes; Irradiation; Kinetic; Photo-Fenton; Tartrazine
• ISSN: 1876-1070; 1876-1089
• DOI: 10.1016/j.jtice.2013.03.014

•Tartrazine degradation follows a pseudo first-order kinetics leading to its total disappearance by photo-Fenton process.•The total organic carbon removal (80%) indicates the presence of some small organic molecules in solution, after 2h irradiation.•The degradation rate was influenced by the temperature with an optimum value of 323K. The kinetics of Tartrazine decay through photo-Fenton process, which has not reported in literature, was explored. Tartrazine is a synthetic azo dye used in food colorants industry, cosmetic and textile industry. There are very few studies in the literature concerning Tartrazine degradation but they did not lead to a total mineralization. Fotooxidative degradation of Tartrazine (E102) by UV/Fe2+/H2O2 was investigated using a laboratory scale photoreactor equipped with a low pressure mercury lamp. The degradation kinetics under irradiation (200–280nm) was optimized in respect to H2O2 concentration (6×10−4M) and Fe2+ concentration (8.28×10−5M) at a constant Tartrazine concentration (1.035×10−5M) at pH 3. The degradation rate was influenced by the temperature with an optimum value of 323K and thermodynamic parameters were calculated. Application of photo-Fenton system also assures total organic carbon removal with 80% efficiency after 2h irradiation.