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New hybrid process combining adsorption on sawdust and electroxidation using a BDD anode for the treatment of dilute wastewater

Bouaziz Karime, Ines and Hamza, Morched and Sellami, A. and Abdelhedi, Ridha and Savall, André and Groenen Serrano, Karine New hybrid process combining adsorption on sawdust and electroxidation using a BDD anode for the treatment of dilute wastewater. (2017) Separation and Purification Technology, 175. 1-8. ISSN 1383-5866

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Official URL: http://dx.doi.org/10.1016/j.seppur.2016.11.020


A new hybrid process that integrates adsorption on sawdust and electrochemical oxidation on a boron doped diamond anode was investigated for the treatment of dilute solutions containing phenol. In such combined process the pollutant is adsorbed until saturation and electrochemical oxidation has been used for both the regeneration of adsorbant and the pollutant removal. Phenol is used as model of pollutant and the efficiency of the regeneration of loaded sawdust has been compared with that of activated carbon (AC), a widely used adsorbent due to its high adsorption capacity which results from its high porosity. The study highlights the effect of electrolysis in the increase of the phenol desorption during the treatment of adsorbents. The regeneration efficiency of AC after 1 cycle of adsorption and regeneration is only 59% due to the electropolymerisation of the strongly adsorbed phenol. By contrast, the electrochemical regeneration of sawdust led to increase the adsorption capacity multiple adsorption and electrochemical regeneration cycles led to an enhancement of adsorption capacity of the sawdust with a complete removal of phenol and the possible reuse of the electrolysis solution.

Item Type:Article
Additional Information:Thanks to Elsevier editor. The definitive version is available at http://www.sciencedirect.com
HAL Id:hal-01497155
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UT3 (FRANCE)
Other partners > Université de Sfax (TUNISIA)
Laboratory name:
Deposited On:22 Nov 2016 11:05

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