International Science Community Association International Research Journal of Environmental Sciences 2319-1414 10 2 2021 04 22 Contribution to the study of phosphorus adsorption on the marine sedimentary layer from an artificial marine estuary: Vridi canal Cote d\'Ivoire) 1 14 EN Arthur MAHI A. Mahi 1 Physical Chemistry Laboratory, UFR SSMT, Felix Houphouet-Boigny University of Cocody Abidjan, B.P. V34 Abidjan, Cote dIvoire Konan YAO Marcel 2 Physical Chemistry Laboratory, UFR SSMT, Felix Houphouet-Boigny University of Cocody Abidjan, B.P. V34 Abidjan, Cote dIvoire Samuel N\'DA 3 Physical Chemistry Laboratory, UFR SSMT, Felix Houphouet-Boigny University of Cocody Abidjan, B.P. V34 Abidjan, Cote dIvoire Albert Trokourey 4 Physical Chemistry Laboratory, UFR SSMT, Felix Houphouet-Boigny University of Cocody Abidjan, B.P. V34 Abidjan, Cote dIvoire > Research Paper 2019 9 8 2021 04 22 This work focused on the study of phosphorus adsorption on the marine sedimentary layer from Vridi canal. The first part of this work has lead on the study of phosphorus adsorption kinetics on these sediments and, the second part on the study of phosphorus adsorption isotherms at 25°C on these entities. These studies were carried out under three experimental conditions partially simulating the seasonal physical and chemical characteristics of the waters from this estuary, namely: (E1) pH = 6, Salinity = 5%; (E2): pH = 7; Salinity = 30%; (E3): pH = 8, Salinity = 35%. The experiments were carried out in batch mode. The results have showed that the rate of phosphorus adsorption on these sediments increases from E1 to E3. The kinetics of this reaction are all pseudo-order 2 (Blanchard model). As a result, Blanchard model takes precedence over the diffusion kinetics of this nutrient in these substrates, and those in all the experiments carried out. Langmuir isotherm describes well the experimental isotherms obtained in E2, with favorable adsorption at the different concentrations of the synthetic phosphorus solutions, as illustrated by Hall adimensional number less than 1. The experimental isotherms obtained in E3 are in agreement with Freundlich isotherm, with a favorable adsorption shown by the heterogeneity factor less than 1. A good description of the isotherm obtained in E1 isn\'t given by these two formalisms, thus reflecting the existence of the different types of sites on these sediments surface, with a considerable difference in adsorption energy depending on their position. Copyright@ International Science Community Association