Research Article
Comparison of AOPs Efficiencies on Phenolic Compounds Degradation
Table 2
Concentration and retention time of by-products of the phenol oxidation in a EO/O3 coupled process.
| | | By-product | Retention time
(min) | Concentration
(ppm) |
| | Aromatic by-products after 10 min of treatment | Benzoquinone | 0.961 | 18 | | Catechol | 1.228 | 30 | | Hydroquinone | 4.988 | 1 |
| | Carboxylic by-products after 20 min of treatment | Oxalic | 2.222 | 8.5 | | Formic | 2.638 | 6 | | Maleic | 3.121 | 7 | | Succinic | 3.332 | 5 | | Fumaric | 3.588 | 2 |
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