Heterogeneous Fenton-like degradation of Rhodamine 6G in water using CuFeZSM-5 zeolite catalyst prepared by hydrothermal synthesis

WOS: 000280601300043PubMed ID: 20627407In this study, heterogeneous Fenton-like degradation of reactive azo dye Rhodamine 6G in water was investigated over a CuFeZSM-5 zeolite catalyst prepared by hydrothermal synthesis. At initial pH of 3.4, a color removal of 100% was achieved after a reaction time of 45 min. TOC elimination was measured to be 51.8% after 2h of oxidation. Initial decolorization rate was described by an equation of -r(A0) = 4.56 x 10(2) e(-24.83/RT) CR6G.00CH2O2,00.35 where R is in kJ/mol. The leaching of iron and copper cations from zeolite structure into the solution during oxidation was dependent on pH strongly. The regulation of pH from 6.5 (dye solution pH) to 3.4, increased leaching for iron from 0.7 to 0.8 mg/dm(3) and for copper from 1.4 to 2.1 mg/dm(3). The copper was totally leached from the catalyst during the process at pH 3.4. (C) 2010 Elsevier B.V. All rights reserved.TUBITAK (The Scientific and Technological Research Council of Turkey)Turkiye Bilimsel ve Teknolojik Arastirma Kurumu (TUBITAK); NASU (National Academy of Sciences of Ukraine) [107M625]; Ege UniversityEge University [2009BIL030]The authors acknowledge the financial support from TUBITAK (The Scientific and Technological Research Council of Turkey) and NASU (National Academy of Sciences of Ukraine) under project number of 107M625. The authors also thank for financial support from Ege University under the project number of 2009BIL030 and Ceyda Yaman for her help in catalyst preparation and characterization studies