Environmental chromium pollution in Burkina Faso is increasing in relation to industrial development. This growth of this heavy metal in water leads to the need to find accessible and effective adsorbents to ensure their elimination. Thus, we were interested in new generations of adsorbents, Kaolinite Nanoparticles (KNP) which were obtained from a local clay, rich in kaolinite, called KOU. The use of KNP for Cr(VI) removal showed that equilibrium was reached after 3 hours of contact time and that adsorption follows a pseudo-second order kinetic model. This suggests the existence of chemisorption. Dose effect results showed removal up to 90% and maximum chromium (VI) adsorption was observed at pH=2. Modeling of the experimental data showed that the adsorption isotherms are more in agreement with the Langmuir model.

chromium; elimination; Kaolinite Nanoparticles (KNP); Chemisorption