Heterogeneous photo-Fenton oxidation with natural clays for phenol and tyrosol remediation

L Djeffal,S Abderrahmane,M Benzina,S Fourmentin,S Siffert,A El Bouari,R Moussa,M Lamire,R El Ouatib,H Hannache,S Krimi,A Aboulayt,I Mansouri

doi:10.1051/matecconf/20130504009

Abstract

Due to their excellent properties, clays have been widely used in several applications, particularly in catalysis. In this paper, three clays were used as heterogeneous photo-Fenton catalysts for phenol and tyrosol oxidations. Particular attention was given to the effect of the main operating conditions on the process performance. A total conversion was obtained for both organic pollutants with studied catalysts in 20 minutes reaction. For phenol, a total organic carbon (TOC) conversion of 93% was obtained using sieved and calcined smectite clay. The TOC conversion was 60% for tyrosol with the same catalyst. Clays were characterized by chemical analysis, BET, XRD, TPR and SEM.

Highlights

Photo Fenton process has been widely studied as promising way to treat various kinds of organic wastewater [1, 2]
We investigated the use of three natural clays from Algeria and Tunisia, as catalysts in the photo-Fenton oxidation of phenol and tyrosol
This study on the oxidative efficiency of clays as catalysts in heterogeneous photo-Fenton reaction for phenol and tyrosol removal, shows that the use of those natural catalysts presents several advantages with respect to the environment. It leads to higher removal percentage of pollutants and total organic carbon at mild operating conditions

Summary

Introduction

Photo Fenton process has been widely studied as promising way to treat various kinds of organic wastewater [1, 2]. Heterogeneous photoFenton process, in which the catalysts can be reused after wastewater treatment and avoid the possible additional metal pollution, is considered as the most efficient. Clays, both natural and chemically modified are attractive materials as catalysts supports [4]. Both natural and chemically modified are attractive materials as catalysts supports [4] Due to their wide utilization in several industries, phenols have become the most abundant pollutant in wastewater. We investigated the use of three natural clays from Algeria and Tunisia, as catalysts in the photo-Fenton oxidation of phenol and tyrosol

Methods

Results

Conclusion