Electrochemical oxidation of cyanide on 3D Ti–RuO 2 anode using a filter-press electrolyzer

Titanium–Platinum Thin Films as a Tool for the Electrooxidation of Cyanide

“…Table 3 shows that the glass|Ti|Pt electrode presented in this research achieves the highest current efficiency of 91%. Also, the calculated energy consumption value (5.15 kWh kg −1 ) of the glass|Ti|Pt electrode is lower than other electrocatalysts found in the literature (30-70 kWh m −3 or 70-393 kWh kg −1 ) [24,30,32,39,68]. In addition, the previously reported comparative study with a plain Pt electrode [10] showed that the current efficiency of cyanide electrooxidation reached 84% during the first hour of electrolysis, i.e., after passing a 144 C electric charge through the solution, but after passing 288 C electric charge, the current efficiency decreased to 59% (Table 3).…”

“…Although other examples of Pt-based electrodes for cyanide utilization have been reported in [22,23,28,[34][35][36], the results of these studies are not included in Table 3 because the initial cyanide concentrations used in these reports were different from the current study, and the conditions of the electrolysis were also different. However, the anodes described by other authors [21,24,39] showed current efficiencies ranging from 3% to 40%, indicating that the glass|Ti|Pt electrode is more efficient. In particular, the glass|Ti|Pt electrode with a very thin layer (about 350 nm) of Pt can be used for effective oxidation of cyanide despite the possibility of some degradation of the Pt layer.…”

“…Effective electrooxidation of cyanide has been achieved by coating a Ti plate with various metal oxides [20,39,40]. However, the preparation of these electrodes is quite complicated because thin film deposition relies on the synthesis of nanoparticles.…”

“…However, the preparation of these electrodes is quite complicated because thin film deposition relies on the synthesis of nanoparticles. Such synthesis requires expensive reagents, special equipment, and high temperatures (up to 400 • C), which are not always practical [39,40].…”

Estudo da biossorção de cianeto de mercúrio gerado na mineração artesanal do ouro visando a descontaminação de águas residuais.

“…Os produtos dessa reação são o dióxido de carbono e nitrogênio (BERENGUER et al, 2019;PÉREZ et al, 2017).…”