ORIGINAL RESEARCH
Polyphenols Content, Chelating Properties
and Adsorption Isotherms and Kinetics of Red
and Yellow Pomegranate Peels (Punica granatum L.)
Towards Lead (II)
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Laboratory of Applied Biochemistry, Faculty of Nature and Life Sciences, Ferhat Abbes University,
Setif 1, 19000 Setif, Algeria
Submission date: 2022-05-02
Final revision date: 2022-06-29
Acceptance date: 2022-07-25
Online publication date: 2022-10-18
Publication date: 2022-12-08
Corresponding author
Noureddine Belattar
Biochemistry Department, Laboratory of Applied Biochemistry, University of Ferhat Abbas, Faculty of Nature and life Sciences, El-Bez, 19000, Sétif, Algeria
Pol. J. Environ. Stud. 2022;31(6):5765-5779
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ABSTRACT
Metal pollutants produced by industrial wastewaters have become a global concern given their
impact on the environment and human health. The purpose of this study was to assess the polyphenols
content and the iron chelating activity in the peels of two pomegranate varieties. After the biomass
characterization via FT-IR, point of zero charge and surface functional groups analysis, the lead
adsorption was then investigated by batch method. Finally, the regeneration of the biomasses was
performed by acidic desorption. Polyphenols content of the red peels extract was higher than the yellow
one; 102.9±0.9 and 85.9±1.3 mg GAE/g of dry weight, respectively with a half iron chelation inhibitory
concentration (IC50) of 227.2±1.7 and 235.9±3.2 μg.mL-1 of extract, successively. For the adsorption
isotherms of lead onto the red and yellow pomegranate peels, the Langmuir model was more fitting
with an adsorption capacity (Qmax) of 90 and 89.25 mg.g-1, respectively. The kinetic data corresponded
better to the pseudo-second order model. The acidic desorption of lead was successful with a high
percentage of recovery. The results demonstrate the effectiveness of these biomasses as biosorbents for
lead removal from aqueous solutions with the possibility of their reuse.