Abstract
The treatment of highly recalcitrant and non-biodegradable solutions of 1 mM of o-toluidine has been comparatively treated by different water treatment technologies based on Fenton's reaction: conventional Fenton process, electro-assisted Fenton process and electro-assisted photo-Fenton process. The pollutant was mainly oxidized by the homogeneous [rad]OH released in situ by the Fenton's reaction. The electro-assisted photo-Fenton technology demonstrated better performance due to the faster electro-regeneration of iron(II) and the coupled photolysis of several by-products such carboxylic acids attaining complete o-toluidine removal in 60 min of treatment. The study of the biodegradability enhancement after the treatment achievieng values near to 0.4 of BOD5/COD ratio assessed the feasible application of electro-assisted photo-Fenton process as pre-biological treatment. In addition, a reaction pathway for o-toluidine mineralization by electro-assisted photo-Fenton's reaction is proposed.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 60-67 |
| Number of pages | 8 |
| Journal | Process Safety and Environmental Protection |
| Volume | 106 |
| DOIs | |
| State | Published - 2017 |
| Externally published | Yes |
Keywords
- Anodic oxidation
- Electrochemical advanced oxidation processes
- Persistent organic pollutants
- Photo-Fenton
- RuO/IrODimensional Stable Anodes (DSA)
- Water treatment technologies
- o-toluidine reaction pathway
ASJC Scopus subject areas
- Environmental Engineering
- Environmental Chemistry
- General Chemical Engineering
- Safety, Risk, Reliability and Quality