Solar active fire clay based hetero-Fenton catalyst over a wide pH range for degradation of Acid Violet 7.
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.
Department of Chemistry, Annamalai University, Annamalainagar 608002, India.
Inbasekaran
I
Muthuvel
Balu
B
Krishnakumar
Meenakshisundaram
M
Swaminathan
D000538:Aluminum Silicates / Q000737:chemistry*; D001391:Azo Compounds / Q000737:chemistry*; D002384:Catalysis; D000077215:Clay; D006861:Hydrogen Peroxide; D006863:Hydrogen-Ion Concentration; D007501:Iron; D009282:Naphthalenesulfonates / Q000737:chemistry*; D013997:Time Factors; D014874:Water Pollutants, Chemical / Q000737:chemistry*
D000538:Aluminum Silicates; D001391:Azo Compounds; C045076:Fenton's reagent; D009282:Naphthalenesulfonates; D014874:Water Pollutants, Chemical; D006861:Hydrogen Peroxide; D007501:Iron; D000077215:Clay; C551247:acid violet 7