Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10389680 | Separation and Purification Technology | 2015 | 8 Pages |
Abstract
Soils polluted with 2,4-D (model of ionic herbicide) can be remediated using a fence of alternating anodes and cathodes surrounding the main contamination point. This works reports results obtained in case study consisting of a 175 dm3 pilot plant, in which a soil polluted with an average concentration of 20 mg kgâ1 of 2,4-D (spread by simulating an accidental spill) undergoes electroremediation for two months with an electric field of 1.0 VDC cmâ1 (between consecutive electrodes). Intensity, temperature, pH, moisture and pollutant concentration in electrolyte wells were daily monitored, and at the end of the experiments, an in-depth post-mortem analysis was carried out. In less than two months, the remediation technology attains a transport of more than 22% of the 2,4-D contained in the soil to the flushing fluids. However, the main mechanism for the removal of 2,4-D was found to be volatilization (which totalizes up to 57% of removal of 2,4-D). The significance of this mechanism was confirmed with the comparison of the results obtained in the remediation test with the results obtained in a reference test consisting of the monitoring of the dispersion of the 2,4-D pollutant in a soil which does no undergo electroremediation treatment. These results are of a great importance for future scaling-up of the technology.
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Filtration and Separation
Authors
C. Risco, S. Rodrigo, R. López-VizcaÃno, A. Yustres, C. Sáez, P. Cañizares, V. Navarro, M.A. Rodrigo,