Journal
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
Volume 303, Issue -, Pages 1-7Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jphotochem.2015.01.013
Keywords
Advanced oxidation; Ethylenediamine-N,N '-dissucinic acid; Photocatalysis; Photo-Fenton
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Funding
- Spanish Ministry of Economy and Competitiveness [CTQ2012-38754-C03-01]
- FAPEMIG (Fundacao de amparo a pesquisa do estado de Minas Gerais)
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This study evaluates the use of the Fe(III)-EDDS complexing agent as an alternative to conventional acidic pH photo-Fenton for the treatment of the pesticide imidacloprid in natural water. The main objective is to estimate whether Fe(III)-EDDS is a viable alternative when treating waters containing high concentrations of contaminants. To this end, the mode of action of Fe(III)-EDDS is examined in the presence of carbonates, at different aeration conditions and at different temperatures. The role of HO2 center dot/O-2(center dot-) radical species and some aspects of the Fe(III)-EDDS complexation mechanism are discussed. Degradation kinetics and toxicities of generated intermediates are compared between Fe(III)-EDDS and conventional photo-Fenton treatment. An overview of the benefits and limitations of the process is presented. (C) 2015 Elsevier B.V. All rights reserved.
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