A detailed study on the sorption characteristics of humic acid onto calcined dolomite

Abstract

Removal of unsafe materials in wastewater is of great significance to the environment. In this study, humic acid has been investigated as the research material for its adsorption characteristics (equilibirium, kinetics and thermodynamics). Dolomite has been used as adsorbent after calcination process of dolomite by heating to 1100 degrees C. The calcined material has been analyzed by Fourier Transform Infrared Spectroscopy (FT-IR) and X-ray Diffraction (XRD) methods for characterization reasons. On the other hand, conditions of the adsorption process have been optimized with Central composite face-centered (CCFC) design of Response Surface Approach (RSA). The findings of the current study will be the first to optimize the process conditions for the humic acid adsorption by a statistical experimental design approach. Moreover, equilibrium, kinetic and thermodynamic parameters have been determined to be able to interpret the nature of the current adsorption process. (C) 2020 Elsevier B.V. All rights reserved.