Electrochemical treatment of effluents: A preliminary study of anodic oxidation of simple sugars using lead dioxide‐coated titanium anodes

Abstract

The electrolysis of simple sugar solutions, containing 0.5% NaCl or Na2SO4, using lead dioxide‐coated titanium mesh anodes in a simple electroflotation cell indicated that electrode corrosion and dissolution of polluting Pb2+ ions from the electrode material were negligible even after prolonged use; the sugars were concomitantly electrooxidised at such anodes. The rate of electrooxidation followed linear removal kinetics and the relative ease of electrochemical destruction was in the order sucrose>maltose∼glucose. Such oxidation processes represent added advantages in the use of these electrodes in electrochemical treatment of effluent containing the sugars. Cyclic voltammetric analysis of the glucose solution indicated that oxygen evolution on the lead dioxide‐titanium anode appeared to be promoted by the presence of the sugar. A much more detailed study is required to give further insight into the mechanism of the anodic oxidation of these compounds.

Comparison of Ti/BDD and Ti/SnO2?Sb2O5 electrodes for pollutant oxidation

“…Good electrodes should be not only effective for pollutant degradation, but also stable electrochemically. Up to date, numerous types of electrodes including Pt [1], graphite [2,3], PbO 2 [4][5][6][7][8], SnO 2 [7,[9][10][11], IrO 2 [11][12][13], Pt-Ir [14], RuO 2 [15], glassy carbon [16], fiber carbon [17], MnO 2 [18,19], TiO 2 [20,21], and boron-doped diamond (BDD) have been investigated. SnO 2 electrodes are generally believed to be superior to Pt, graphite, PbO 2 , and many other common electrodes.…”

Active Ti/SnO2 anodes for pollutants oxidation prepared using chemical vapor deposition

“…The pollutants oxidation efficiency depends highly on the properties of the anodes. Up to date, numerous types of electrode materials including Pt [1], graphite [2,3], PbO 2 [4][5][6][7][8], SnO 2 [7,[9][10][11], IrO 2 [11][12][13], Pt-Ir [14], RuO 2 [15], MnO 2 [16,17], TiO 2 [18,19], and boron-doped diamond (BDD) [20] have been investigated. BDD electrodes have exhibited the highest efficiency for pollutants oxidation [20].…”

Electrochemical Wastewater Treatment Processes

“…When current densities increased to 10-100 A/m 2 , the CE values were only 6-17% (148). Despite the satisfactory results obtained in oxidizing simple inorganic pollutants at very low current densities (149), Pt electrodes show poor efficiencies in anodic oxidation of organic compounds (150,151). The carbon black addition was found to enhance the performance of Ti/Pt anodic oxidation of aqueous phenol significantly (139).…”