A Comparative Study on Hexavalent Chromium Adsorption onto Chitosan and Chitosan-Based Composites.

ABSTRACT: Chitosan (Cs)-based composites were developed by incorporating silica (Cs-Si), and both silica and hydroxyapatite (Cs-Si-Hap), comparatively tested to sequester hexavalent (Cr(VI)) ions from water. XRD and FT-IR data affirmed the formation of Cs-Si and Cs-Si-Hap composite. Morphological images exhibits homogeneous Cs-Si surface, decorated with SiO₂ nanoparticles, while the Cs-Si-Hap surface was non-homogeneous with microstructures, having SiO₂ and Hap nanoparticles. Thermal analysis data revealed excellent thermal stability of the developed composites. Significant influence of pH, adsorbent dose, contact time, temperature, and coexisting anions on Cr(VI) adsorption onto composites was observed. Maximum Cr(VI) uptakes on Cs and developed composites were observed at pH

SUBMITTER: Billah REK 

PROVIDER: S-EPMC8512014 | biostudies-literature | 2021 Oct

REPOSITORIES: biostudies-literature