Oxidation of azo and anthraquinonic dyes by peroxymonosulphate activated by UV light
Pagano, M; Ciannarella, R; Locaputo, V; Mascolo, G; Volpe, A
| HERO ID | 4348998 |
|---|---|
| In Press | No |
| Year | 2018 |
| Title | Oxidation of azo and anthraquinonic dyes by peroxymonosulphate activated by UV light |
| Authors | Pagano, M; Ciannarella, R; Locaputo, V; Mascolo, G; Volpe, A |
| Journal | Journal of Environmental Science and Health, Part A: Toxic/Hazardous Substances & Environmental Engineering |
| Volume | 53 |
| Issue | 4 |
| Page Numbers | 393-404 |
| Abstract | The photochemical degradation of two azo and two anthraquinonic dyes was performed using potassium peroxymonosulphate (Oxone®) activated by UV radiation. The fast decolourization of all dyes was observed within 6 min of UV irradiation, with corresponding dye decays higher than 80%. The kinetic rate constants of the dyes' decay were determined, along with the energetic efficiency of the photochemical treatment, taking into account the influence of a few anions commonly present in real wastewaters (i.e., chloride, nitrate, carbonate/bicarbonate and phosphate ions). Chloride and carbonate/bicarbonate ions enhanced dye degradation, whereas phosphate ions exerted an inhibitory effect, and nitrates did not have a predictable influence. The dye decolourization was not associated with efficient mineralization, as suggested by the lack of a significant total organic carbon (TOC) decrease, as well as by the low concentrations of a few detected low molecular weight by-products, including nitrate ions, formaldehyde and organic acids. High molecular weight by-products were also detected by mass spectrometry analysis. The investigated process may be proposed as a convenient pre-treatment to help dye degradation in wastewater during combined treatment methods. |
| Doi | 10.1080/10934529.2017.1404331 |
| Pmid | 29281500 |
| Wosid | WOS:000425703000010 |
| Is Certified Translation | No |
| Dupe Override | No |
| Is Public | Yes |
| Language Text | English |