Kinetics and Isotherm Models of Cu++ Biosorption by Biomass of Helianthus Annuus

ENSAR, OGUZ (2016) Kinetics and Isotherm Models of Cu++ Biosorption by Biomass of Helianthus Annuus. In: Fourth International Conference On Advances in Applied Science and Environmental Technology- ASET 2016, 07-08 May 2016, Bangkok, Thailand.

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Abstract

The kinetics of biosorption of Cu++ ions by biomass of Helianthus Annuus was found fast, and reached equilibrium in 20 min and followed pseudo-second order rate equation. To evaluate the biosorption equilibrium, four isotherm models were fitted to experimental data. The best model was determined by taking into account correlation coefficient (r2) and Average Percentage Error (APE). The best adjustment from two parameter isotherms was observed to be the D-R (r2 0.973, APE % 1.60). The mean energy of biosorption was calculated as 12.69 kJ mol−1 from the D-R biosorption isotherm. Activation energy (Ea) of the biosorption was determined as 8.56 kJ mol-1. Thermodynamic parameters such as ∆H°, ∆S° and ∆G° were calculated from the slope and intercept of linear plot of lnKD versus 1/T.

Item Type: Conference or Workshop Item (Paper)
Uncontrolled Keywords: Copper (II), Isotherm, Helianthus Annuus, Thermodinamic, Biosorption
Depositing User: Mr. John Steve
Date Deposited: 23 Mar 2019 12:10
Last Modified: 23 Mar 2019 12:10
URI: http://publications.theired.org/id/eprint/837

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