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Biodegradability Improvement of Sulfamethazine Solutions by Means of an electro-Fenton Process

Abstract : The main objective of this study was to examine the effect of an electro-Fenton pretreatment on the biodegradability of sulfamethazine-polluted solutions. The aim of the pretreatment was only to degrade this molecule in order to increase the biodegradability of the effluent and therefore allow a subsequent biological treatment. Preliminary tests showed the absence of biodegradability of the target compound. The degradation of sulfamethazine by electro-Fenton process was then examined using a carbon felt cathode and a platinum anode in an electrochemical reactor containing 1 L of solution. The influence of some experimental parameters such as initial concentration, temperature and current intensity on the degradation by electro-Fenton step has been investigated. In addition, the biodegradability of the solution after electrochemical pretreatment was examined and showed a Biological Oxygen Demand (BOD5) on Chemical Oxygen Demand (COD) ratio above the limit of biodegradability, namely 0.4, for several experimental conditions. The feasibility of coupling an electro-Fenton pretreatment with a biological degradation of by-products in order to mineralize polluted solutions of sulfamethazine was confirmed.
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Submitted on : Monday, October 14, 2013 - 2:29:48 PM
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Dorsaf Mansour, Florence Fourcade, Nizar Bellakhal, Mohamed Dachraoui, Didier Hauchard, et al.. Biodegradability Improvement of Sulfamethazine Solutions by Means of an electro-Fenton Process. Water, Air, and Soil Pollution, Springer Verlag, 2012, 223 (5), pp.2023-2034. ⟨10.1007/s11270-011-1002-7⟩. ⟨hal-00872795⟩



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