International Journal of Environmental Science and Development

Abstract—The biosorbent α-keratin-alginate (KA) was prepared by using the encapsulation technique in CaCl2 2 % (w/v) solution. The biosorbent was characterized by Fourier Transform Infrared (FTIR) and Scanning Electron Microscope (SEM). The extent of adsorption was found to be a function of the composition of α-keratin and alginate, the pH of solution and contact time. The optimum adsorption of Fe ions in aqueous solution was found at the composition of α-keratin and alginate of 1:2 (w/w), the pH at 7.0 and contact time at 60 minutes. The adsorption of Fe ions on KA biosorbent was comparatively higher than α-keratin and alginate only. The adsorption capacity of KA biosorbent has the maximum adsorption capacity of 658.4 mg/g while biosorbent α-keratin and alginate are 464.7 mg/g and 528.1 mg/g, respectively. Adsorption of Fe ions in aqueous solution followed the Freundlich adsorption isotherm, and the dynamic adsorption model could be described through a pseudo-second order kinetics.

Index Terms—α-keratin, adsorption, alginate, biosorbent, Fe.

G. Fadillah is with Institute of Technology Bandung, Indonesia (e-mail: ganjarfadillah@students.itb.ac.id, ganjarfadillah52@gmail.com).
E. N. K. Putri, S. Febrianastuti, E. V. Maylinda, and C. Purnawan are with Sebelas Maret University, Indonesia (email: elsaninsa22@gmail.com, syahnafebri97@gmail.com, easymaylinda18@gmail.com, candra_pr@gmail.com).

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Cite: G. Fadillah, E. N. K. Putri, S. Febrianastuti, E. V. Maylinda, and C. Purnawan, "Adsorption of Fe Ions from Aqueous Solution Using α-Keratin-Coated Alginate Biosorbent," International Journal of Environmental Science and Development vol. 9, no. 3, pp. 82-85, 2018.