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document
Removal And Regeneration of As(V) In Aqueous Solutions By Adsorption On Calcined Fluorapatite: Kinetics And Thermodynamic Parameters.
Abstract
<jats:title>Abstract</jats:title><jats:p>In this work, Fluorapatite has been prepared and successfully applied for the removal of As (VI). The materials prepared have been characterized using X-ray diffraction (XRD), infrared transform transform spectroscopy. Fourier (FTIR), scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDS). Thermogravimetric analysis (TGA) and zero load point pH (pH<jats:sub>PZC</jats:sub>) were also considered as part of these characterizations. In this work, several parameters affecting the adsorption process were studied, such as: the mass effect, time, pH, and the initial concentration effect. The value of the regression coefficient showed that the data The experimental results corresponded best to the pseudo-second order (PSO) model, while the Langmuir adsorption isotherms best described the equilibrium adsorption data with the highest qm of 43.10 mg / g. Finally, FapC has been successfully reused for more than 5 cycles without significant loss of its sorption capacity.</jats:p>