The Investigation of Ni (II) Removal by Biocomposite Synthesized with the Immobilization of Candida Utilis on Chitosan
Abstract
In this study, Ni(II) adsorption was examined with the biocomposite
prepared with the immobilization of Candida utilis
on chitosan polymer. The FTIR and SEM analyses of chitosan-Candida utilis biocomposite
were carried out before and after adsorption of Ni (II) ions. For the Ni(II)
adsorption by C. utilis immobilized on
chitosan, the Ni(II) concentrations
were changed in the concentration range of 10-100 mg/L. For the Ni(II)
adsorption by C. utilis immobilized on
chitosan, the optimum pH value was
determined to be 4.0, and temperature was
determined to be 25 0C. Under these experimental conditions, the
maximum adsorbed amount of Ni(II) per unit weight of adsorbent was found to be
9.5 mg/g. The adsorption equilibrium data adjusted to the Langmuir isotherm
model. The kinetic data were represented by the pseudo-first-order kinetic
model. The enthalpy, entropy and Gibbs free energy changes were found to be
-4.61 kj/mol, 1.97 j/mol, -10.48 kj/mol, respectively. With respect to the
results obtained in this study, new chitosan-Candida utilis biocomposites
will become an alternative for the removal of heavy metals from wastewaters.
Keywords
References
- [1]. Suhong, C., Qinyan, Y., Baoyu, G., Qian, L., Xing, X., Removal of Cr (VI) from aqueous solution using modified corn stalks: Characteristic, equilibrium, kinetic and thermodynamic study, Chemical Engineering Journal, 168 (2011) 909–917.
- [2]. Yu., X., Tong. S., Ge. M., Wu. L., Zou. J., Cao. C., Song. W., Adsorption of heavy metal ions from aqueous solution by carboxylated cellulose nanocrystals, Journal of Environmental Sciences, 25(5) (2013) 933–943.
- [3]. Chatterjee, S.K., Bhattacharjee, I., Chandra, G., Biosorption of heavy metals from industrial waste water by Geobacillus thermode nitrificans, Journal of Hazardous Materials, 175 (2010) 117–125.
- [4]. Lidija T., Ljiljana S., Biljana M, Maja J., Bojan M., Ivanka M., Immobilization of Candida rugosa lipase by adsorption onto biosafemeso/macroporous silica and zirconia, Biochemical Engineering Journal, 93 (2015) 73–83.
- [5]. Jin. Y.L., Speers, R.A., Flocculation of Saccharomyces cerevisiae, Food Res Int., 31 (1998) 421-440.
- [6]. Rapoport, A., Borovikova, B., Kokina, A., Patmalnieks, A., Polyak, N., Pavlovska, I., Mezinskis, G., Dekhtyar, Y., Immobilisation of yeast cells on the surface of hydroxyapatite, Process Biochemistry, 46 (2011) 665–670.
- [7]. Monvisade, P., Siriphannon, P., Chitosan intercalated montmorillonite: Preparation, characterization and cationic dye adsorption, Applied calay Science, (2009) 427.
- [8]. Cheung. W.H., Ng. J.C.Y., McKay. G., Equilibrium studies for the sorption of lead from effluents using chitosan, Chemosphere, 52 (2003) 1021-1030.
- [9]. Aksu, Z., Yener, J.,A comparative adsorption/biosorption study of mono-chlorinat phenols onto various sorbents, Waste Management, 21 (2001) 695-702.
- [10]. Bayat, B., Comparative study of adsorption properties of Turkish fly ashes, The case of nickel(II), copper(II) and zinc(II), Journal of Hazardous Materials, 95(3) (2002) 251-273.