Aims: The efficiency of Myrtus communis leaves to eliminate Cr(VI) from
aqueous solutions has been investigated.
Background: Optimization, kinetic and thermodynamic studies on bio-sorption and bioreduction
of Cr(VI) by Myrtus communis leaves.
Objective: To eliminate Cr(VI) from aqueous solutions.
Method: Batch mode studies, kinetic and thermodynamic studies.
Result: The maximum bio-removal was obtained at an initial Cr(VI) concentration of
100 mg/L, biomass of 0.150 g, pH 2, and a temperature of 25°C. The modeling study
has shown that the bio-removal kinetics obeyed the pseudo-second-order model along
with an R2= 0.9947.
Conclusion: A total removal of Cr(VI) after 60 minutes has been noticed. Also, the kinetic
studies have indicated that the bioreduction of Cr (VI) to Cr (III) coupled with biosorption
was produced on biomass sites. Based on the determined thermodynamic parameters
(Gibbs energy (ΔG0), enthalpy (ΔH0), and entropy (ΔS0)), the bio-removal
process was found to be endothermic and spontaneous in nature.
Other: Myrtus communis leaves powder was characterized by spectroscopy (FTIR) and
scanning electron microscope analysis (SEM-EDX).