Reduction of Oxidizable Pollutants in Waste Water from the Wadi El Bey River Basin Using Magnetic Nanoparticles as Removal Agents

Hajer Tlili; Anis Elaoud; Nedra Asses; Karima Horchani-Naifer; Mounir Ferhi; Gerardo F. Goya; Jesús Antonio Fuentes-García

doi:10.3390/magnetochemistry9060157

Magnetochemistry (Jun 2023)

Reduction of Oxidizable Pollutants in Waste Water from the Wadi El Bey River Basin Using Magnetic Nanoparticles as Removal Agents

Hajer Tlili,
Anis Elaoud,
Nedra Asses,
Karima Horchani-Naifer,
Mounir Ferhi,
Gerardo F. Goya,
Jesús Antonio Fuentes-García

Affiliations

Hajer Tlili: Laboratory of Physico-Chemistry of Mineral Materials and Their Applications, National Center for Research in Materials Sciences CNRSM, Technopole Borj Cedria, P.O. Box 73, Soliman 8027, Tunisia
Anis Elaoud: Higher Institute of Environmental Sciences and Technologies, Carthage University, P.O. Box 1003, Hammam-Lif 2050, Tunisia
Nedra Asses: Higher Institute of Environmental Sciences and Technologies, Carthage University, P.O. Box 1003, Hammam-Lif 2050, Tunisia
Karima Horchani-Naifer: Laboratory of Physico-Chemistry of Mineral Materials and Their Applications, National Center for Research in Materials Sciences CNRSM, Technopole Borj Cedria, P.O. Box 73, Soliman 8027, Tunisia
Mounir Ferhi: Laboratory of Physico-Chemistry of Mineral Materials and Their Applications, National Center for Research in Materials Sciences CNRSM, Technopole Borj Cedria, P.O. Box 73, Soliman 8027, Tunisia
Gerardo F. Goya: Departamento de Física de la Materia Condensada, Facultad de Ciencias, Universidad de Zaragoza, 50009 Zaragoza, Spain
Jesús Antonio Fuentes-García: Departamento de Física de la Materia Condensada, Facultad de Ciencias, Universidad de Zaragoza, 50009 Zaragoza, Spain

DOI: https://doi.org/10.3390/magnetochemistry9060157
Journal volume & issue: Vol. 9, no. 6
p. 157

Abstract

Read online

Many of the current strategies for removing pollutants from water are based on nanomaterials and nanotechnology. Lower values of Biological Oxygen Demand (BOD5) and Chemical Oxygen Demand (COD) in water results in reduction in the amount of oxidizable pollutants. We present a study on the reduction of COD and BOD5 in water from Wadi El Bey River (Tunisia), using magnetite nanoparticles (MNPs) and magnetic fields. The COD and BOD5 removal reached values higher than 50% after 60 min, with optimum efficiency at pH values of ≈8 and for MNPs concentrations of 1 g/L. The use of a permanent magnetic field (0.33 T) showed an increase of COD and BOD5 removal from 61% to 76% and from 63% to 78%, respectively. This enhancement is discussed in terms of the MNPs coagulation induced by the magnetic field and the adsorption of ionic species onto the MNPs surface due to Fe3O4 affinity.

Published in Magnetochemistry

ISSN: 2312-7481 (Online)
Publisher: MDPI AG
Country of publisher: Switzerland
LCC subjects: Science: Chemistry
Website: http://www.mdpi.com/journal/magnetochemistry

About the journal

Abstract

Keywords