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Optimization, Kinetic and Thermodynamic Studies on Biosorption and Bio-reduction of Chromium Hexavalent by Myrtus communis Leaves

Author(s):

Toufek Metidji*, Hacene Bendjeffal, Abdelkrim Djebli, Hadjer Mamine, Hamida Bekakria Bekakria and Bouhedja Yacine   Pages 1 - 11 ( 11 )

Abstract:


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 bio-reduction 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, a biomass of 0.150 g, pH 2 and temperature of 25°C. The modeling study has shown that the bio-removal kinetics obeyed to the pseudo-second-order model along with an R2= 0.9947

Conclusion: It has been noticed that a total removal of Cr(VI) after 60 minutes. 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 (∆G0), enthalpy (∆H0), and entropy (∆S0)), 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)

Keywords:

Bio-sorption; bio-reduction; Cr(VI); Cr(III); Myrtus communis leaves; kinetics; thermodynamics.

Affiliation:

Laboratory of Water Treatment and Waste Recovery (LTEVDI), University of Badji Mokhtar-Annaba, 23000, , Higher School for Professors of Technological Education, Skikda 21000, , Laboratory of Water Treatment and Waste Recovery (LTEVDI), University of Badji Mokhtar-Annaba, 23000, , Laboratory of Water Treatment and Waste Recovery (LTEVDI), University of Badji Mokhtar-Annaba, 23000, , Laboratory of Water Treatment and Waste Recovery (LTEVDI), University of Badji Mokhtar-Annaba, 23000, , Laboratory of Water Treatment and Waste Recovery (LTEVDI), University of Badji Mokhtar-Annaba, 23000



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