Oxidative degradation of 1,5-naphthalenedisulfonic acid in aqueous solutions by microwave irradiation in the presence of H2O2
Ravera, M; Buico, A; Gosetti, F; Cassino, C; Musso, D; Osella, D
| HERO ID | 617360 |
|---|---|
| In Press | No |
| Year | 2009 |
| Title | Oxidative degradation of 1,5-naphthalenedisulfonic acid in aqueous solutions by microwave irradiation in the presence of H2O2 |
| Authors | Ravera, M; Buico, A; Gosetti, F; Cassino, C; Musso, D; Osella, D |
| Journal | Chemosphere |
| Volume | 74 |
| Issue | 10 |
| Page Numbers | 1309-1314 |
| Abstract | Sulfonated aromatic pollutants such as Armstrong’s acid, or 1,5-naphthalenedisulfonic acid (NDS), are recalcitrant to environmental breakdown and microbial treatment. This study investigated the effects of H2O2 concentration, pH, microwave (MW) power and irradiation time on the oxidative degradation of NDS in aqueous solutions. The formation of hydroxyl radicals as the active oxidant was confirmed by electron paramagnetic resonance spin trapping. A combination of both H2O2 and MW heating proved essential for NDS degradation. Degradation factors of f ⩾70% were obtained after about 20min of irradiation at [H2O2]:[NDS] ratios=10. Acidic conditions were found to be more favorable to the degradation of NDS, and the process follows pseudo-first-order kinetics. Attempts to scale-up the process using a conventional MW reactor provided less striking results. [Copyright 2009 Elsevier] Copyright of Chemosphere is the property of Pergamon Press - An Imprint of Elsevier Science and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts) |
| Doi | 10.1016/j.chemosphere.2008.11.064 |
| Pmid | 19118858 |
| Wosid | WOS:000264432400004 |
| Is Certified Translation | No |
| Dupe Override | No |
| Is Public | Yes |
| Keyword | OXIDATION; C.I. direct blue 15; SULFONATES; IRRADIATION; ELECTRON paramagnetic resonance; HYDROXYL group; WASTE products; HYDROGEN peroxide |
| Is Qa | No |