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Comparative Adsorption of Lead(II) on Flake and Bead‐Types of Chitosan
Author(s) -
Wan Ngah W. S.,
Ab Ghani S.,
Hoon L. L.
Publication year - 2002
Publication title -
journal of the chinese chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.329
H-Index - 45
eISSN - 2192-6549
pISSN - 0009-4536
DOI - 10.1002/jccs.200200096
Subject(s) - adsorption , chemistry , chitosan , aqueous solution , isothermal process , langmuir adsorption model , bead , ion , langmuir , absorption (acoustics) , nuclear chemistry , chemical engineering , organic chemistry , thermodynamics , composite material , materials science , physics , engineering
The adsorption of Pb(II) ions from aqueous solutions by chitosan flakes and beads was studied. The chitosan beads were prepared by casting an acidic chitosan solution into alkaline solution. Experiments were carried out as a function of pH, agitation period and initial concentration of Pb 2+ ions. The uptake of Pb 2+ ions from aqueous solution was determined from changes in concentration as measured by atomic absorption spectroscopy. The maximum uptake of Pb 2+ ions on chitosan beads was greater than that on chitosan flakes. Adsorption isothermal data could be interpreted by the Langmuir equation. The experimental data of the adsorption equilibrium from Pb 2+ ion solutions correlated well with the Langmuir isotherm equation. SEM analyses were also conducted for visual examination of the chitosan flakes and beads. Physical properties including surface area and average pore diameter were characterized by N 2 adsorption experiment.