Article

Water, Air, & Soil Pollution

, Volume 223, Issue 5, pp 2023-2034

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

  • Dorsaf MansourAffiliated withUniversité Rennes 1, Ecole Nationale Supérieure de Chimie de Rennes, CNRSLaboratoire de Chimie Analytique et Électrochimie, Département de Chimie, Faculté des Sciences de TunisInstitut National des Sciences Appliquées et de TechnologieUniversité Européenne de Bretagne
  • , Florence FourcadeAffiliated withUniversité Rennes 1, Ecole Nationale Supérieure de Chimie de Rennes, CNRSUniversité Européenne de Bretagne
  • , Nizar BellakhalAffiliated withLaboratoire de Chimie Analytique et Électrochimie, Département de Chimie, Faculté des Sciences de TunisInstitut National des Sciences Appliquées et de Technologie
  • , Mohamed DachraouiAffiliated withLaboratoire de Chimie Analytique et Électrochimie, Département de Chimie, Faculté des Sciences de Tunis
  • , Didier HauchardAffiliated withEcole Nationale Supérieure de Chimie de Rennes, CNRSUniversité Européenne de Bretagne
  • , Abdeltif AmraneAffiliated withUniversité Rennes 1, Ecole Nationale Supérieure de Chimie de Rennes, CNRSUniversité Européenne de Bretagne Email author 

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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.

Keywords

Biodegradability improvement Electro-Fenton pretreatment Coupled processes Drug removal Sulfatmethazine