Cobalt mediated electro-scrubbers for the degradation of gaseous perchloroethylene
At a Glance
Section titled āAt a Glanceā| Metadata | Details |
|---|---|
| Publication Date | 2021-04-08 |
| Journal | Chemosphere |
| Authors | Florymar Escalona-DurĆ”n, MartıĢn MuƱoz, F.L. Souza, Cristina SĆ”ez, Pablo CaƱizares |
| Institutions | Universidade Federal do Rio Grande do Norte, University of Castilla-La Mancha |
| Citations | 5 |
Abstract
Section titled āAbstractāThis work focuses on the treatment of gaseous perchloroethylene (PCE) using electro-scrubbing with diamond electrodes and cobalt mediators. PCE was obtained by direct desorption from an aqueous solution containing 150 mg L<sup>-1</sup>, trying to a real pollution case. The electro-scrubber consisted of a packed absorption column connected with an undivided electrochemical cell. Diamond anodes supported on two different substrates (tantalum and silicon) were used and the results indicated that Ta/BDD was more successful in the production of Co (III) species and in the degradation of PCE. Three experimental systems were studied for comparison purposes: absorbent free of Co (III) precursors, absorbent containing Co (III) precursors, and absorbent containing Co (III) precursors undergoing previous electrolysis to the electro-scrubbing to facilitate the accumulation of oxidants. The most successful option was the last, confirming the important role of mediated electrochemical processes in the degradation of PCE. Trichloroacetic acid (TCA) and carbon tetrachloride (CCl<sub>4</sub>) were found as the primary reaction products and ethyl chloroacetate esters were also identified. A comprehensive mechanism of the processes happening inside electro-scrubber is proposed.
Tech Support
Section titled āTech SupportāOriginal Source
Section titled āOriginal SourceāReferences
Section titled āReferencesā- 2019 - Enhanced electro-reduction of NO to NH3 on Pt cathode at electro-scrubber [Crossref]
- 2019 - Removal of HCl gas from off gases using self-priming venturi scrubber [Crossref]
- 2015 - Influence of cathode on the electro-generation of peroxydisulfuric acid oxidant and its application for effective removal of SO2 by room temperature electro-scrubbing process [Crossref]
- 2007 - Biodegradation of chlorinated compoundsāa Review [Crossref]
- 2019 - Advancing environmental exposure assessment science to benefit society [Crossref]
- 2020 - Electro-absorbers: a comparison on their performance with jet-absorbers and absorption columns [Crossref]
- 2009 - Experimental aspects of combined NOx and SO2 removal from flue-gas mixture in an integrated wet scrubber-electrochemical cell system [Crossref]
- 2013 - An improved method of removal for high concentrations of NO by electro-scrubbing process [Crossref]
- 2015 - Cl-mediated electrochemical oxidation for treating an effluent using platinum and diamond anodes [Crossref]