Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8327063 | International Journal of Biological Macromolecules | 2018 | 33 Pages |
Abstract
In this study, the Cu(II) and Cd(II) ions removal behavior of crosslinked chitosan beads grafted poly(methacrylamide) (abbreviated as crosslinked chitosan-g-PMAm) from single metal ion solutions was investigated. The modified chitosan beads presented a remarkable improvement in acid resistance. The batch experiments demonstrated that pH of solution played a significant role in adsorption. It was found that the adsorption of Cu(II) and Cd(II) were optimum at pHâ¯4 and pHâ¯5, respectively. The maximum adsorption capacities for Cu(II) and Cd(II) based on Langmuir equation were 140.9â¯mgâ¯gâ1 and 178.6â¯mgâ¯gâ1, respectively. Pseudo-second order gave a better fit for adsorption data with respect to linearity coefficients than pseudo-first order suggesting that chemisorption or electron transfer is the dominant mechanism of the metal ions onto crosslinked chitosan-g-PMAm. In addition, X-ray photoelectron spectroscopy (XPS) investigations revealed that adsorption of both metal ions took place on the surfaces of crosslinked chitosan-g-PMAm by chelation through CNH2, CO and CO groups. Overall, the modified chitosan has proved a promising adsorbent for removal of metal ions.
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Authors
Zetty Azalea Sutirman, Mohd Marsin Sanagi, Khairil Juhanni Abd Karim, Wan Aini Wan Ibrahim, Binta Hadi Jume,