Evaluation of the texture properties and adsorption affinity of grain surface of hematite sand (Agadir region)

Abstract

The texture properties and adsorption affinity of Hematite Sand (HS) were studied by nitrogen at 77 K and methylene blue dye adsorption in aqueous phase, respectively. Characterization of raw HS and treated HS was performed. The experimental data were fitted to Langmuir as well as Freundlich adsorption isotherm equations using non-linear regression method. According to the BJH, 40 % of the total pore volume disappeared on treated HS surface after sieving process and acid treatment due to absence of microspores. Finally, the dye adsorption was influenced significantly by solution pH and the presence of inorganic salt (KCl)