Zinc retention by marl collected from the aquifer substratum

Abstract

Calcite and Quartz X-Fluorescence shows the predominance of silica, alumina and lime. In FTIR analysis, all bands are identified for S20, S6. The specific surface area for S20 and S6 are equal respectively to 21.6206 m²/g and 24.6445 m²/g and our materials have a meso-porous character. The retention capacity at equilibrium for S20 and S6 are equal respectively to 9.94 (mg/g) and 9.87 (mg/g). Liquid film diffusion and intraparticle diffusion models control simultaneously the process of adsorption of zinc in Marl. Non-linear treatment gives Langmuir and Temkin as best model for S20 and Freundlich for S6. Radlish-Peterson is the best model for S20 but for S6 the best model is given simultaneously by Sips and Radlish-Peterson. The values of AIC and AICc give a good opportunity to separate between used isotherms models.