Journal
WATER RESEARCH
Volume 43, Issue 18, Pages 4441-4450Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.watres.2009.07.011
Keywords
Photo-Fenton; Sunlight; Inorganic ions; Biodegradability; Pesticides
Funding
- Spanish Agencia Espanola de Cooperacion Internacional y desarrollo [A/016500/08]
- Spanish Ministerio de Ciencia y Tecnologia [CTQ2006-14743-C03]
- Generalitat Valenciana [GVPRE/2008/369]
- Universidad Politecnica de Valencia [PAID 06-08/003-64]
- European Cooperation in Science and Technology
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The effect of eleven inorganic ions (Cl-, NO3-, SO42-; PO43-, Na+; NH4+, Ca2+, Mg2+, Zn2+, Cu2+ and Al3+) on the photo-Fenton elimination of pesticides has been investigated. Phosphate and chloride have been demonstrated to have an inhibitory role; on the other hand, the reaction was accelerated in the presence Of Cu2+, most probably due to a copper-driven Fenton-like process. The solar photo-Fenton treatment of a mixture of four commercial pesticides was studied at pilot plant scale in the presence of chlorides. Samples with coincident dissolved organic carbon (DOC) showed similar chemical composition, which resulted in a comparable biocompatibility, however longer irradiation periods were needed to reach the desired mineralization when Cl- was present. it was demonstrated that the chemical process was able to improve significantly the biocompatibility of the effluent, as shown by the inhibition of respiration of activated sludge, BOD/COD ratio and Zahn-Wellens test. (C) 2009 Elsevier Ltd. All rights reserved.
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