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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
environmental science
Phosphorus removal from aqueous solution using iron coated natural and engineered sorbents
Journal of Hazardous Materials, Volume 151, No. 1, Year 2008
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Description
New filtration materials covered with metallic oxides are good adsorbents for both cation and anion forms of pollutants. Sfax is one of the most important industrial towns in Tunisia. Its phosphate manufacture in particular is causing considerable amounts of water pollution. Therefore, there is a need to find out a new way of getting rid of this excessive phosphate from water. This work is aimed to examining the potential of three sorbent materials (synthetic iron oxide coated sand (SCS), naturally iron oxide coated sand (NCS) and iron oxide coated crushed brick (CB)) for removing phosphate ions from aqueous solutions. According to our literature survey CB was not used as adsorbent previously. Phosphate ions are used here as species model for the elimination of other similar pollutants (arsenates, antimonates). Optical microscope and scanning electron microscope (SEM) analyses were used to investigate the surface properties and morphology of the coated sorbents. Infra-red spectroscopy and X-ray diffraction techniques were also used to characterize the sorbent structures. Results showed that iron coated crushed brick possess more micro pores and a higher surface area owing to its clay nature. The comparative sorption of PO43- from aqueous solutions by SCS, CB and NCS was investigated by batch experiments. The estimated optimum pH of phosphate ion retention for the considered sorbents was 5. The equilibrium data were analysed using the Langmuir and Freundlich isotherms. The sorption capacities of PO43- at pH 5 were 1.5 mg/g for SCS, 1.8 mg/g for CB and 0.88 mg/g for NCS. The effect of temperature on sorption phenomenon was also investigated. The results indicated that adsorption is an endothermic process for phosphate ions removal. This study demonstrates that all the considered sorbents can be used as an alternative emerging technology for water treatment without any side effect or treatment process alteration. © 2007 Elsevier B.V. All rights reserved.
Authors & Co-Authors
Boujelben, Nesrine
Tunisia, Sfax
Ecole Nationale D'ingénieurs de Sfax
Bouzid, Jalel
Tunisia, Sfax
Ecole Nationale D'ingénieurs de Sfax
Elouear, Zouhair
Tunisia, Sfax
Ecole Nationale D'ingénieurs de Sfax
Feki, Mongi
Tunisia, Sfax
Ecole Nationale D'ingénieurs de Sfax
Fakher, Jamoussi
Tunisia, Soliman
Centre de Recherches et Des Technologies Des Eaux
Montiel, Antoine J.
France, Paris
Société Anonyme de Gestion Des Eaux de Paris
Statistics
Citations: 216
Authors: 6
Affiliations: 3
Identifiers
Doi:
10.1016/j.jhazmat.2007.05.057
ISSN:
03043894
Research Areas
Environmental
Study Design
Cross Sectional Study
Study Approach
Quantitative
Study Locations
Tunisia