Detecting cadmium(II) by using coal extracted from argan oilcake waste (Argania spinosa) as modifier of carbon paste electrode.

K. Abbi, L. Hermouch, Y. elhamdouni, N. Labjar, A. Skalli, I. Merimi, F. Jeffali, M. El Mahi, El M. Lotfia, S. El Hajjaji.


The detection of Cd2+ ions was studied by cyclic voltammetry (CV) and Square Wave Voltammetry (SWV). This method is mainly based on the accumulation of Cd2+ ions on the surface of a carbon paste electrode modified by coal extract from argan oilcake waste (AC-CPE). To evaluate the detection  performance of AC-CPE against Cd2+ ions, an optimization  study was carried out to determine the following optimal conditions, pH=5, preconcentration time of 120s, and deposition potential of 1.2V. Under these optimal conditions, a linear relationship between current peak intensity and concentration has been defined  over a concentration range from 5.10-4 to 5.10-7M; with detection limit (DL, 3 б) of 3.04x10-6M. An analytical application of the electrode in a real matrix, tap water, was performed and revealed good detection performance of AC-CPE. These results show that the AC-CPE can be used as an excellent detector of Cd2+ ions in aqueous solution

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