TITLE:
α-Endosulfan Removal from Water by Adsorption over Natural Clays from Burkina Faso: An Isothermal Study
AUTHORS:
Arsène H. Yonli, Hermann A. Kabore, Jean Koulidiati
KEYWORDS:
α-Endosulfan, Removal, Water, Natural Clays, Burkina Faso
JOURNAL NAME:
Journal of Materials Science and Chemical Engineering,
Vol.2 No.11,
November
10,
2014
ABSTRACT: The present study carried out the α-endosulfan removal from water by adsorption over natural
clays from the western region of Burkina Faso. The adsorption experiments were performed over
raw clay samples at room temperature in batch reactor and the obtained adsorption isotherms
were well fitted by Fowler-Guggenheim model. It was pointed out for all samples that α-endosulfan
was physisorbed in the interlayer space of the clay samples. The maximal adsorption capacities
were respectively about 9.12, 6.98 and 4.13 mg/g for KO2, KO1 and KW1 samples. The differences
in terms of adsorption capacity for the three samples were due to the presence of illite in
the samples KO2 and KO1 when the KW1 sample contained essentially kaolinite in its structure.
When the interlayer space was large enough as for samples with illite a greater amount of α-endosulfan
molecules were adsorbed. It was also shown that the samples with the higher surface area were
the most efficient for the removal of α-endosulfan molecules from water. Moreover, this study exhibited
that the α-endosulfan adsorption depended on the crystallites size; the samples presenting
largest crystallites had the greatest adsorption capacities.