Journal
CHEMICAL ENGINEERING JOURNAL
Volume 228, Issue -, Pages 1148-1157Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2013.05.002
Keywords
Nitrobenzene; Copper(II); Iron(III); Fenton-like; Photo-enhancement
Categories
Funding
- ANPCyT, Argentina [PICT 1435]
- CONICET, Argentina [PIP 0425]
- UNLP, Argentina [X559]
- CONICET
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Nitrobenzene (NBE) degradation in Fenton-like systems using copper(II) as catalyst was investigated and compared with the trends observed in iron(Ill)-based systems. UV-vis spectroscopy, HPLC and TOC measurements were used to characterize the evolution of the reaction mixtures. Kinetic profiles were analyzed under a wide range of experimental conditions in order to assess the effects of the reaction temperature, initial concentrations and working pH. For both Cu(II)-based and Fe(III)-based systems, treatment times decreased with increasing oxidant and catalyst concentrations, but augmented with increasing NBE concentration. However, significant differences were observed for Cu(II)-based systems: higher activation energy above room temperature, broader pH range of activity with an optimal pH of about 6.2, absence of 1,3-dinitrobenzene among the reaction products and important reductions in the TOC levels even in the absence of irradiation. (C) 2013 Elsevier B.V. All rights reserved.
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