Treatment of chlorinated solvents by TiO2 photocatalysis and photo-Fenton: Influence of operating conditions in a solar pilot plant

S. Malato Rodríguez, J. Blanco Gálvez, Manuel I. Maldonado Rubio, P. Fernández Ibáñez, W. Gernjak, I. Oller Alberola

Research output: Contribution to journalArticlepeer-review

44 Citations (Scopus)

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 languageEnglish
Pages (from-to)391-398
Number of pages8
JournalChemosphere
Volume58
Issue number4
DOIs
Publication statusPublished - 8 Feb 2005

Keywords

  • Advanced oxidation processes
  • Solar photocatalysis
  • Wastewater treatment

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