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Characterization and Evaluation of Natural Bearing and Iron-Enriched Montmorillonitic Clay as Catalysts for Wet Oxidation of Dye-Containing Wastewaters
| Content Provider | MDPI |
|---|---|
| Author | Maicaneanu, Sanda Andrada Henninger, David L. Lake, Charles H. Addicott, Ethan Olar, Loredana E. Stefan, Razvan |
| Copyright Year | 2022 |
| Description | Natural bearing (raw and calcined at 500 °C) and iron-enriched (impregnation and pillaring) montmorillonitic clay samples were prepared. The obtained samples were characterized (X-ray diffraction, Fourier Transformed Infrared Spectroscopy, Scanning Electron Microscopy, and Energy Dispersive X-ray Spectroscopy) and evaluated as catalysts in catalytic wet oxidation of Brilliant Green and Crystal Violet. Experiments were conducted in the same conditions (0.5 g catalysts, 300 mL air/min or 0.5 mL $H_{2}O_{2}$, 25 mL of dye solution, 25 °C, initial solution pH = 6.0, for 3 h) in thermostated batch reaction tubes. Process evolution was followed using UV-Vis spectrometry (200–1100 $cm^{−1}$) and total organic carbon. Dye removal efficiencies (decolorization) between 98 and 99% were determined, while total organic carbon removal efficiencies were calculated to be in the 53–98% range. Iron leakage investigation showed that iron is lost in higher amounts for the catalysts prepared using the impregnation method by comparison with the pillared sample. |
| Starting Page | 652 |
| e-ISSN | 20734344 |
| DOI | 10.3390/catal12060652 |
| Journal | Catalysts |
| Issue Number | 6 |
| Volume Number | 12 |
| Language | English |
| Publisher | MDPI |
| Publisher Date | 2022-06-14 |
| Access Restriction | Open |
| Subject Keyword | Catalysts Environmental Engineering Iron Natural Bearing Impregnation Pillaring Catalytic Wet Air Oxidation Catalytic Wet Peroxide Oxidation Brilliant Green Crystal Violet |
| Content Type | Text |
| Resource Type | Article |
