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|Title: ||Equilibrium, Kinetic and Thermodynamic Assessment of the Adsorption of Copper (Cu2+) Ion using Luffa Cylindrica Seed Shell Biomass|
|Authors: ||Gongden, J. J.|
Lawal, R. A.
Ranga, Y. G.
Lohdip, Y. N.
|Keywords: ||Copper (ii) ion|
|Issue Date: ||2019|
|Publisher: ||Nigerian Journal of Chemical Research|
|Series/Report no.: ||Vol. 24;Iss. 2; Pp 26-41|
|Abstract: ||The adsorption of copper (ii) ions from aqueous solution by Luffa cylindrica seed shell biomass
was carried out with effects of initial metal ion concentration, solution pH, contact time,
adsorbent dose and temperature of the process investigated. An optimum adsorbent dosage of
3.0g showed maximum metal uptake capacity (qe) of 1.9229 mg/g (98.2%) for an initial metal
ion concentration of 2.0 mg/L and pH 5.5. Sorption equilibrium time was observed in 30
minutes. The equilibrium adsorption data were analyzed using Langmuir, Freundlich, and
Temkin adsorption isotherm models. Temkin isotherm yielded the best fit to the experimental
equilibrium adsorption data with a correlation coefficient (R2
) of 0.7027. Pseudo-first-order,
pseudo-second-order, and intra-particle diffusion models were used to discuss the kinetics of the
adsorption. It was discovered that the adsorption of copper (ii) ions could be described by the
pseudo-second-order kinetic model. Thermodynamic parameters such as enthalpy (ΔH0
entropy change of the sorption (ΔS0
) evaluated showed that the process was spontaneous,
feasible and exothermic in nature. The results indicated that L. Cylindrica seed shell biomass
can be used as an effective and low-cost adsorbent to remove copper (ii) ions from aqueous
|Appears in Collections:||Chemistry|
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