The effect of the sp3/sp2 carbon ratio on the electrochemical oxidation of 2,4-D with p-Si BDD anodes
At a Glance
Section titled âAt a Glanceâ| Metadata | Details |
|---|---|
| Publication Date | 2015-11-14 |
| Journal | Electrochimica Acta |
| Authors | F.L. Souza, Cristina Såez, Marcos R.V. Lanza, Pablo Cañizares, Manuel A. Rodrigo |
| Institutions | University of Castilla-La Mancha, Universidade de SĂŁo Paulo |
| Citations | 66 |
Abstract
Section titled âAbstractâBoron-doped diamond films on silicon substrates (p-Si BDD) with different sp3/sp2 carbon ratios are systematically varied in electrodes used to oxidize 2,4-dichlorophenoxyacetic acid (2,4-D) in synthetic wastewater containing chlorides. 2,4-D is completely mineralized during the electrolysis. A higher sp3/sp2 ratio in the anode results in a more rapid and efficient oxidative removal of 2,4-D. Chlorinated compounds such as 4-chlororesorcinol, 2-chlorophenol, and 2,4-dichlorophenol form as intermediates during the oxidative treatment. Although these compounds are completely depleted during the electrolysis, their maximum observed concentrations decrease as the sp3 content increases in the anode. On the contrary, higher maximum concentrations are observed for non-chlorinated intermediates, especially hydroquinone, and there is a greater formation of chlorates and perchlorates in chloride-containing solutions as the sp3 content increases in the anode.