Multifunctional Group Biomass in Biosorption of Cu2+ from Aqueous Solution: Kinetics and Isotherm Studies

INYINBOR, A.A and ADEKOLA, F.A and Olatunji, Gabriel Ademola (2017) Multifunctional Group Biomass in Biosorption of Cu2+ from Aqueous Solution: Kinetics and Isotherm Studies. Pakistan Journal of Analytical & Environmental Chemistry, 18 (2). pp. 94-104. ISSN ISSN-1996-918X

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Abstract

A novel, fibrous and multifunctional group surface biosorbent was prepared from the waste of Irvingia gabonensis (Dika nut-DN) seed. The biosorbent potential in cheap environmental remediation was tested using aqueous copper solution as adsorbate. Percentage Cu2+ removal was as high as 70 %. Sorption data were tested with various isotherms and kinetics models. Monolayer sorption dominates the uptake of Cu2+ onto DN with maximum monolayer sorption capacity of 227.27 mg/g. Some level of multilayer sorption also occurred within the Cu2+ -DN system thus a greater than 0.9 correlation coefficient recorded for the Freundlich sorption isotherm. Possible Cu2+ uptake mechanism onto DN was proposed. Pseudo second order kinetics best described the biosorption data while desorption results showed that Cu2+ was stable on DN surface. Keywords: Biomass, Irvingia gabonensis, Kinetics, Isotherms, Thermodynamics. ---------------------------------------------------------------------------------------------------------------

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