Abstract
Photo-Fenton-like treatment of the commercially important naphthalene sulphonate K-acid (2-naphthylamine-3,6,8-trisulphonic acid) was investigated using UV-C, UV-A and visible light irradiation. Changes in toxicity patterns were followed by the Vibrio fischeri bioassay. Rapid and complete degradation of K-acid accompanied with nearly complete oxidation and mineralization rates (>90%) were achieved for all studied irradiation types. On the other hand, detoxification was rather limited and did not change significantly during photo-Fenton-like treatment. Several oxidation products could be identified via liquid chromatograph-mass spectrometer analyses, such as desulphonated and hydroxylated naphthalene derivatives, quinones, and ring-opening as well as dimerization products. Photo-Fenton-like treatment of K-acid with UV-C, UV - A and visible light irradiation occurred through a series of hydroxylation and desulphonation reactions, followed by ring cleavage. A common degradation pathway for photo-Fenton-like treatment of K-acid using different irradiation types was proposed.
| Original language | English |
|---|---|
| Pages (from-to) | 1056-1064 |
| Number of pages | 9 |
| Journal | Water Science and Technology |
| Volume | 70 |
| Issue number | 6 |
| DOIs | |
| Publication status | Published - 2014 |
Bibliographical note
Publisher Copyright:© IWA Publishing 2014.
Keywords
- Degradation pathway
- Irradiation type
- K-acid
- Naphthalene trisulphonate
- Oxidation products
- Photo-Fenton-like treatment
- Vibrio fischeri