کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
66961 | 48459 | 2009 | 7 صفحه PDF | دانلود رایگان |
The degradation of Alizarin Red S (ARS), an anthraquinone dye was investigated by advanced photo Fenton process using zero valent metallic iron (ZVMI) powder as the catalyst with symmetrical peroxides like hydrogen peroxide (HP)/ammonium persulfate (APS) as the oxidants. APS is proved to be a better oxidant compared to HP as it provides efficient acidic medium which is critical for Fenton process. A kinetic/mathematical model was developed based on the non-linear regression analysis and the validity of the model was tested by comparing the observed experimental values with the theoretically calculated data. The rate equation obtained was found to be a function of iron dosage, oxidant and dye concentration at pH 3.k=0.2456[Fe]0.21[APS]0.15[ARS]−0.76k=0.2456[Fe]0.21[APS]0.15[ARS]−0.76k=0.58[Fe]0.12[HP]0.10[ARS]−0.86k=0.58[Fe]0.12[HP]0.10[ARS]−0.86The degradation pathway was followed by UV–vis spectroscopy and GC–MS techniques. Based on the intermediates analyzed, a probable degradation mechanism has been proposed.
An approach to kinetic/mathematical model based on the non-linear regression analysis for the degradation of Alizarin Red S by advanced photo Fenton process.Figure optionsDownload as PowerPoint slide
Journal: Journal of Molecular Catalysis A: Chemical - Volume 314, Issues 1–2, December 2009, Pages 88–94