Solar active fire clay based hetero-Fenton catalyst over a wide pH range for degradation of Acid Violet 7 |
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Authors: | Inbasekaran Muthuvel Balu Krishnakumar and Meenakshisundaram Swaminathan |
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Institution: | Department of Chemistry, Annamalai University, Annamalainagar 608002, India;Department of Chemistry, Annamalai University, Annamalainagar 608002, India;Department of Chemistry, Annamalai University, Annamalainagar 608002, India |
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Abstract: | Fe(III) immobilized fire clay (Fe-FC) was prepared using ferric nitrate by solid state dispersion method and this hetero-Fenton catalyst was applied for the degradation of Acid Violet 7 (AV 7) under natural sunlight. The 26% ferric nitrate loaded fire clay was found to be most efficient. The experimental conditions such as solution pH, H2O2 concentration for efficient degradation of AV 7 have been determined. Unlike Fenton catalyst, Fe-FC is photoactive over a wide pH range of 3-7. This catalyst was found to be stable and reusable. The GC-MS analysis of experimental solutions during irradiation revealed the formation of 2,8-diaminonaphthalene-1,3,6-triol, 8-aminonaphthalene-1,2,3,6-tetrol, 2-aminonaphthalene-1,3,6,8-tetrol and 2-aminobenzene-1,3-diol/5-aminonbenzene-1,3-diol/ 2-aminobenzene-1,4-diol as intermediates. The 26% ferric nitrate loaded fire clay was characterized by XRD, ICP-AES, BET surface area, FT-IR, SEM-EDS and UV-DRS studies. |
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Keywords: | hetero-Fenton degradation Acid Violet 7 fire clay wastewater treatment solar light |
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