Exploring the applicability of a combined electrodialysis/electro-oxidation cell for the degradation of 2,4-dichlorophenoxyacetic acid
At a Glance
Section titled âAt a Glanceâ| Metadata | Details |
|---|---|
| Publication Date | 2018-03-02 |
| Journal | Electrochimica Acta |
| Authors | Javier Llanos, Alexandra Raschitor, Pablo Cañizares, Manuel A. Rodrigo |
| Institutions | University of Castilla-La Mancha |
| Citations | 34 |
Abstract
Section titled âAbstractâThe improvement in the treatment efficiency of diluted effluents is one of the great challenges faced by electrochemical technology nowadays. In the present work, it is aimed to develop an electrochemical cell for the simultaneous concentration and degradation of ionic organic pollutants. This combined cell (so called EDEO device) integrates the concentration of the organic by electrodialysis (ED) with its electro-oxidation (EO). For the particular case of the 2,4-dichlorophenoxyacetic acid (2,4-D), the performance of the cell has been tested with two anode materials (boron-doped diamond, BDD and mixed mineral oxides, MMO) and with two supporting electrolytes in order to explore four combinations that are expected to cover a wide range of possible actual scenarios. Results demonstrate that the combined EDEO process exhibits a degradation rate and a mineralization current efficiency markedly higher than the equivalent EO device when working with MMO anodes, either with NaCl or with Na2SO4. It was checked that the use of a BDD anode clearly increases the efficiency and the rate of the treatment due to the formation of strong oxidants. In this case, the effect of working with the combined EDEO in the rate of 2,4-D degradation is negligible because the 2,4-D transport rate becomes comparable to the degradation rate, being the combined process unable to generate a concentration greater than that accounted in the single EO device.
Tech Support
Section titled âTech SupportâOriginal Source
Section titled âOriginal SourceâReferences
Section titled âReferencesâ- 2017 - Comparative electrochemical degradation of the herbicide tebuthiuron using a flow cell with a boron-doped diamond anode and identifying degradation intermediates [Crossref]
- 2017 - Study of persistent toxic pollutants in a river basinâecotoxicological risk assessment [Crossref]
- 2017 - Organochlorinated pesticides levels in a representative sample of the Spanish adult population: the Bioambient.es project [Crossref]
- 2015 - Electrochemical oxidation of carbaryl on platinum and boron-doped diamond anodes using electro-Fenton technology [Crossref]
- 2017 - Bioaugmentation as a strategy for the remediation of pesticide-polluted soil: a review [Crossref]
- 2014 - Electrochemically assisted remediation of pesticides in soils and water: a review [Crossref]
- 2015 - Heterogeneous fenton-like catalytic degradation of 2,4-dichlorophenoxyacetic acid in water with FeS [Crossref]
- 2015 - Modeling and optimization of photo-Fenton degradation of 2,4-D using ferrioxalate complex and response surface methodology (RSM)
- 2011 - Photocatalytic degradation of 2,4-dichlorophenoxyacetic acid by Ca-Ce-W-TiO2 composite photocatalyst [Crossref]
- 2014 - Degradation of 2,4-D herbicide in a recirculation flow plant with a Pt/air-diffusion and a BDD/BDD cell by electrochemical oxidation and electro-Fenton process [Crossref]