Adsorption of copper ions from water onto fish scales derived biochar: Isothermal perspectives
Abstract/ Overview
In this work, Tilapia (Oreochromis niloticus) fish scales were used for the development
of an economical biochar (FSB) by slow pyrolysis at 600 oC. The FSB was characterized
using energy dispersive x-ray (EDX), x-ray fluorescence (XRF), x-ray diffractometry
(XRD), Fourier transform infrared (FTIR), and scanning electron microscopy (SEM)
techniques. The potential of FSB for the uptake of copper ions from water was examined
as a function of initial concentration. Adsorption data were treated using eleven
adsorption isotherms, and the most applicable equation obtained by comparison of the
coefficient of determination (R2
) values calculated by nonlinear regression method.
Equilibrium data were best explained by Langmuir isotherm denoting monolayer
adsorption of Cu(II) ions onto FSB. The FSB’s maximum adsorption capacity was 39.39
mg/g.
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