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Relevance of Photocatalysis prior to Biological Treatment of Organic Pollutants - Selection Criteria

Abstract : The relevance of a photocatalytic pretreatment prior to a biological process for removal of organic pollutants was examined. Owing to the significant residual amount and toxicity, amitrole was not relevant. High mineralization allowed to remove bisphenol A and 2,4-dichlorophenoxyacetic acid. Isoproturon and diuron cannot be considered due to the slight evolution of chemical oxygen demand/ total organic carbon (COD/TOC) and average oxidation state during irradiation. After photocatalysis, the ratio of biological oxygen demand (BOD5)/COD remained below the biodegradability limit (0.4) for the rest of the molecules. A favorable COD/TOC trend (decrease during irradiation) was recorded for dimethoate and antibiotics. However, dimethoate and sulfamethoxazole seemed not pertinent due to the long time span for their removal. Since a decrease of toxicity was only recorded for tylosine, it can be selected for subsequent tests.
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https://hal-univ-rennes1.archives-ouvertes.fr/hal-00869438
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Submitted on : Thursday, October 3, 2013 - 12:04:07 PM
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Florence Fourcade, Souhila Yahiat, Karine Elandaloussi, Stephan Brosillon, Abdeltif Amrane. Relevance of Photocatalysis prior to Biological Treatment of Organic Pollutants - Selection Criteria. Chemical Engineering and Technology, Wiley-VCH Verlag, 2012, 35 (2), pp.238-246. ⟨10.1002/ceat.201100396⟩. ⟨hal-00869438⟩

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