This work reports the fabrication of a novel electrochemical sensor for the detection of the complex ion [Cu(CN)3](aq)2−, one of the main components of the effluents from cyanide alkaline copper plating baths. This sensor was prepared by using a surface modified glassy carbon (GC) electrode with 1,8-dihydroxyantroquinone (1,8-DHAQ). It was characterized by electrochemical impedance, Raman spectroscopy and UV–Visible spectroscopy. The electrochemical detection of [Cu(CN)3](aq)2−was performed by differential pulse voltammetry. The 1,8-DHAQ/GC electrochemical sensor exhibits good reproducibility and a linear range of 5.50 × 10−7–3.81 × 10−6 mol L−1, with a detection limit (LOD) of 1.20 × 10−6 mol L−1, quantification limit (LOQ) of 3.97 × 10−6 mol L−1, and robustness to interfering Cl−, NO3−, SO42− y CO32− ions. Finally, a DFT approach suggests an almost par...

The use of vegetable waste to obtain activated carbon has been used in recent years for the removal of heavy metal contaminants in water. For this reason, this study presents the obtaining of activated carbon from recycled orange peel (OPAC), synthesized by two activation processes and then thermal treatment, for the removal of cadmium ions, Cd(II), due to its high toxicity. Characterizations by Raman and FT-IR spectroscopy indicated the presence of characteristic functional groups of carbon. The evaluation of the surface area calculated by the BET (Brunauer-Emmett-Teller) method, yielded a specific surface area of 154,96 m2.g-1 and a pore size distribution of 6,70 nm and 12,39 nm calculated by the BJH method (Barrett-Joyner-Halenda). The removal process in different supporting electrolytes was evaluated by the electrochemical method of square wave voltammetry (SWV), obtaining 0,1 mol.L-...