Removal of Cd(Ii) And Mn(Ii) Ions from Aqueous Solution using Chitosan and Its Derivatives from Fish Scale ‘Giwan Ruwa’ (Lates Niloticus)

Abstract

In this research, the removal of Cd (II) and Mn (II) ions from aqueous solution using chitosan and its derivatives from fish scale Lates niloticus in a batch adsorption system was studied. Effects of parameters like adsorbent dose, pH, contact time, temperature and initial ion concentration were also studied. At lower pH values, the adsorption of the ions on chitosan and cross-linked chitosan beads is more because in the presence of H⁺, the amino groups of chitosan and cross-linked chitosan behaves as a quaternary ammonium ion to attract more of the ions from the reaction mixture. The uptake of the ions on chitosan (GRCH), chitosan-glutaraldehyde bead (GRGLA) and chitosan-epichlorohydrin bead (GRECH) was as follows; Cd(II) ions 99.12%, 96.80% and 96.20% respectively, while Mn(II) ions was 99.60%, 95.48% and 96.00% respectively.