Author(s)

Amadou Sarr Gning¹, Cheikh Gaye¹, Antoine Blaise Kama², Pape Abdoulaye Diaw^3,4*, Diène Diégane Thiare⁴, Modou Fall¹

¹Laboratoire de Chimie Physique Organique et d’Analyses Environnementales (LCPOAE), Université Cheikh Anta Diop, Dakar, Sénégal.
²Equipe Chimie des Matériaux Inorganique et Organique (ECMIO), Université Alioune Diop, Bambey, Sénégal.
³Equipe des Matériaux, Electrochimie et Photochimie Analytiques (EMEPA), Université Alioune Diop, Bambey, Sénégal.
⁴Laboratoire de Photochimie et d’Analyse (LPA), Université Cheikh Anta Diop, Dakar, Sénégal.

Metal trace elements (MTE) are among the most harmful micropollutants of natural waters. Eliminating them helps improve the quality and safety of drinking water and protect human health. In this work, we used mango kernel powder (MKP) as bioadsorbent material for removal of Cr (VI) from water. Uv-visible spectroscopy was used to monitor and quantify Cr (VI) during processing using the Beer-Lambert formula. Some parameters such as pH, mango powder, mass and contact time were optimized to determine adsorption capacity and chromium removal rate. Adsorption kinetics, equilibrium, isotherms and thermodynamic parameters such as ΔG˚, ΔH˚, and ΔS˚, as well as FTIR were studied to better understand the Cr (VI) removal process by MKP. The adsorption capacity reached 94.87 mg/g, for an optimal contact time of 30 min at 298 K. The obtained results are in accordance with a pseudo-second order Freundlich adsorption isotherm model. Finally FTIR was used to monitor the evolution of absorption bands, while Scanning Electron Microscopy (SEM) and Energy Dispersive X-ray Spectroscopy (EDS) were used to evaluate surface properties and morphology of the adsorbent.

Adsorption, Chromium, Mango Kernel Powder, Spectroscopy Analysis, Water Treatment

Gning, A. , Gaye, C. , Kama, A. , Diaw, P. , Thiare, D. and Fall, M. (2024) Hexavalent Chromium Cr (VI) Removal from Water by Mango Kernel Powder. Journal of Materials Science and Chemical Engineering, 12, 84-103. doi: 10.4236/msce.2024.121007.