Assessment of a new approach of metal ions chelation by Gallic acid
F. Boudou1,2,*, M. Bendahmane-Salmi1,2, , M. Benabderrahmane1, A. Belakredar3 , A. Berroukche4, O. Zaoui4
Gallic acid (3,4,5-trihydroxybenzoic acid) belongs to phenolic acids.
Gallic acid is a member of the class of hydroxybenzoic acids.
Folin-Ciocalteu assay is used to determine phenolic compounds in food and herbs.
Metal chelating activity results from the formation of bonds between two or more atoms.
GA can remove toxic metals, e.g. Al, Cd and Pb through chelating process.
The complex formation capacity of Gallic acid (GA) was investigated in aqueous solution for three known toxic metal ions, e.g. aluminum (Al), lead (Pb) and cadmium (Cd). The metal chelating activity of GA was determined spectrophotometrically using a new approach, namely Folin-Ciocalteu (FC) assay. This method consists in the measuring of absorbance of the unbound GA remaining from its interaction with the metal ions which allows the deduction of the bounded one. The highest rates of chelating were found at different concentrations such as 66.37±0.017%, 59.36 ±0.044% and 49.71±0.004% for Al, Cd and Pb, respectively. These findings suggested that GA could be an appropriate mean to remove toxic metals such as Al, Cd and Pb through chelating process.
To cite this article: Boudou F, Bendahmane-Salmi M, Benabderrahmane M, Belakredar A, Berroukche A, Zaoui O. Assessment of a new approach of metal ions chelation by Gallic acid. Journal of Desalination and Water Purification 2019;15:3-6.