期刊
CHEMICAL ENGINEERING JOURNAL
卷 173, 期 2, 页码 503-510出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2011.08.022
关键词
Fenton's reagent; Oxidation; COD; Phenols compounds; Kinetics study; Olive-oil mill wastewater
资金
- Ministry of Science and Technology [PPQ2003-07873, CTQ 2007-66178]
The degradation of organic matter present in olive-oil mill wastewater from two-phase olive-oil extraction process was carried out by chemical oxidation reaction. It was shown that organic matter is efficiently degraded through a Fenton-like reaction using FeCl3 as catalyst in the presence of hydrogen peroxide. Oxidation was carried out in a batch reactor with controlled temperature. Operating at pH 3.0. H2O2 concentration = 100 g dm(-3), [FeCl3]/[H2O2] ratio = 0.04, and ambient temperature (281-285 K). 92.6% of chemical oxygen demand and 99.8% of total phenols were removed. Kinetics can be described by a two step first order model. The kinetic parameters at ambient temperature and pH 3 were calculated. In the temperature range 278-313 K, the best performance was obtained at 303 K. The experiments performed at different temperatures allowed to calculate the apparent activation energy E-a = 8.7 kJ mol(-1). (C) 2011 Elsevier B.V. All rights reserved.
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