Phosphorus sorption kinetics in different types of alkaline soils |
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| Authors: | Wissem Hamdi David Pelster Mongi Seffen |
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| Affiliation: | 1. Institute of Agronomy of Chott Meriem, University of Sousse, Sousse, Tunisia;2. Institute of Applied Sciences and Technology, Laboratory of Energy and Materials (LABEM), University of Sousse, Sousse, Tunisiawissemhemdi@yahoo.fr;4. Agriculture and Agri-Food Canada, Soils and Crops Research and Development Centre, Quebec, Canada;5. Institute of Applied Sciences and Technology, Laboratory of Energy and Materials (LABEM), University of Sousse, Sousse, Tunisia |
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| Abstract: | This study investigated phosphorus sorption kinetics of three different soils from three sites within the Sahel region of Tunisia; iso-humic soils from Chott-Mariem site, calcic-magnesic soils from Enfidha site and saline-sodic soils from Kondar site. Soils from all sites were sampled (0–25 cm) and analysed for their physico-chemical proprieties. In previous works, we determined the adsorption efficiency of these different soils. In this study, we focused on the influence of contact time on phosphorus adsorption by the different soils. The analytic data were approached from the following kinetics models: pseudo-first-order, pseudo- second-order and Elovich model. The second order model was shown to be the best fit for describing phosphorus adsorption by each soil sample, as seen from the correlation coefficient R2 which ranged from 0.68 to 0.96 for the pseudo-first-order model, 0.91 to 0.99 for pseudo-second-order model and 0.84 to 0.94 for Elovich model. |
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| Keywords: | phosphorus sorption kinetics models Sahel of Tunisia |
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