Abstract
Titanium dioxide photocatalysis (using 200 mg l-1 of TiO 2), under aerobic and anaerobic conditions, and photo-Fenton (2 and 56 mg l-1 iron) were applied to the treatment of different NBCS (non-biodegradable chlorinated solvents), such as dichloroethane, dichloromethane and trichloromethane dissolved in water at 50 mg l-1. All the tests were performed in a 35-l solar pilot plant with compound parabolic collectors (CPCs) under natural illumination. The two solar treatments were compared with attention to chloride release and TOC mineralisation, as the main parameters. Photo-Fenton was found to be the more appropriate treatment for these compounds, assuming volatilisation as a drawback of photocatalytic degradation of NBCS dissolved in water. In this context, several operating parameters related to NBCS degradation, e.g., treatment time, temperature, hydrogen peroxide consumption and volatility of parent compounds are discussed. The correct choice of operating conditions can very often diminish the problem of volatilisation during treatment.
| Original language | English |
|---|---|
| Pages (from-to) | 391-398 |
| Number of pages | 8 |
| Journal | Chemosphere |
| Volume | 58 |
| Issue number | 4 |
| DOIs | |
| Publication status | Published (in print/issue) - 8 Feb 2005 |
Funding
The authors wish to thank the European Commission (Research DG) for its financial assistance under the Energy, Environment and Sustainable Development Programme (No. EVK1-CT-2002-00122, “CADOX Project” ( http://www.psa.es/webeng/projects/cadox/index.html ). They also wish to thank Mrs. Deborah Fuldauer for correcting the English. Mr. Gernjak would like to thank the Austrian Academy of Sciences for a grant under the DOC Programme.
Keywords
- Advanced oxidation processes
- Solar photocatalysis
- Wastewater treatment