Use of Pt and Boron‐Doped Diamond Anodes in the Electrochemical Advanced Oxidation of Ponceau SS Diazo Dye in Acidic Sulfate Medium
At a Glance
Section titled “At a Glance”| Metadata | Details |
|---|---|
| Publication Date | 2017-12-05 |
| Journal | ChemElectroChem |
| Authors | Alexsandro J. dos Santos, Carlos A. Martínez‐Huitle, Ignasi Sirés, Enric Brillas |
| Institutions | Universidade Federal do Rio Grande do Norte, Universitat de Barcelona |
| Citations | 47 |
Abstract
Section titled “Abstract”Abstract The electrochemical degradation of 2.5 L of Ponceau SS diazo dye solution in acidic sulfate medium has been studied in a pre‐pilot flow plant with a boron‐doped diamond (BDD)/air‐diffusion or Pt/air‐diffusion cell connected to an annular photoreactor. The decolorization and mineralization was enhanced in the order: electrochemical oxidation with electrogenerated H 2 O 2 <electro‐Fenton<photoelectro‐Fenton. The two former methods performed better with the BDD anode, whereas the latter yielded similar results for both anodes. From this, the use of less expensive active anodes such as Ti|Pt instead of non‐active BDD for photo‐assisted Fenton‐based electrochemical processes is recommended. In all methods, increasing current density led to a greater degradation rate, but with lower mineralization current efficiency and higher energy consumption. Five primary aromatic products and four final carboxylic acids were detected, along with recalcitrant products poorly removed by hydroxyl radicals and UVA radiation.
Tech Support
Section titled “Tech Support”Original Source
Section titled “Original Source”References
Section titled “References”- 2003 - Color Chemistry: Synthesis, Properties, and Applications of Organic Dyes and Pigments