期刊
FLUORIDE
卷 52, 期 4, 页码 562-568出版社
INT SOC FLUORIDE RESEARCH
关键词
Activated carbon; Batch adsorption; Eucalyptus bark; Fluoride; Thermodynamic parameters
资金
- Zahedan University of Medical Sciences, Zahedan, Iran
In this experimental study, batch adsorption experiments were implemented to survey the potential of eucalyptus bark activated carbon (EBAC) in the adsorption of fluoride (F-). The studied adsorbent was synthesized using the chemical activation method in the presence of phosphoric acid. The effect of several parameters, e.g., the contact time, the initial F- concentration, and the temperature on the F- adsorption onto the EBAC was investigated under constant values for the pH (6.5) and the adsorbent dosage (2 g/L). The calculation of the standard free energy changes (Delta G(0)), the standard enthalpy change (Delta H-0), and the standard entropy change (Delta S-0) were carried out at different temperatures and initial F- concentrations. The Delta G(0) values were negative and the Delta H-0 values and the Delta S-0 values were positive at all temperatures and concentrations which suggests that the F- adsorption onto the EBAC was a spontaneous and endothermic process.
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