E. Oliveros et al., LARGE-SCALE DEVELOPMENT OF A LIGHT-ENHANCED FENTON REACTION BY OPTIMAL EXPERIMENTAL-DESIGN, Water science and technology, 35(4), 1997, pp. 223-230
Citations number
22
Categorie Soggetti
Water Resources","Environmental Sciences","Engineering, Civil
Photochemical advanced oxidation processes (AOP) for the treatment of
waste waters containing biocidal or non-biodegradable organic compound
s rely mainly on the production of a potent oxidizing agent, the hydro
xyl radical, The Fenton's reagent, a mixture of hydrogen peroxide and
ferrous ion, represents one possible source of hydroxyl radicals and i
t has been shown recently that degradation rates may be significantly
enhanced by UV/visible irradiation. In this context, we have investiga
ted the feasibility of a large scale application of the light-enhanced
Fenton reaction to the treatment of a highly contaminated industrial
waste water containing toxic aromatic amines (dimethyl anilines or xyl
idines) as the main pollutants. Following preliminary laboratory tests
performed on the model compounds, 2,4- and 3,4-xylidines (200 mg/L, 2
L), experimentation on the industrial waste water at a large scale le
vel (3000 mgC/L, 500 L) has been carried out using the experimental de
sign methodology for the simulation and the evaluation of the effects
of the two critical factors, hydrogen peroxide and ferrous ion concent
rations. The light-enhanced Fenton reaction has been proven to be a mo
st effective treatment process under acidic conditions and might be an
alternative to adsorption of xylidines on activated carbon as used at
present. (C) 1997 IAWQ. Published by Elsevier Science Ltd.