Related Experiment Video
Updated: Jan 21, 2026

Electrostatic Method to Remove Particulate Organic Matter from Soil
Published on: February 10, 2021
Electro Fenton removal of clopyralid in soil washing effluents
María Belén Carboneras Contreras1, Florence Fourcade2, Aymen Assadi2
1Chemical Engineering Department. Research Institute for Chemical and Environmental Technology (ITQUIMA). University of Castilla- La Mancha, 13071, Ciudad Real, Spain; Univ Rennes, Ecole Nationale Supérieure de Chimie de Rennes, CNRS, UMR 6226, F-35000, Rennes, France.
Abstract:
The removal of a commercial herbicide, based on clopyralid, by means of Electro-Fenton (EF) was studied using a soil washing effluent obtained using synthetic ground water as washing fluid. From the results, it was observed that the degradation and mineralization yields of clopyralid were high, even without the addition of supporting electrolyte. The groundwater could be then used as a sustainable supporting electrolyte. The influence of the minerals constituents, the current and the ferrous ions regeneration was evaluated. The highest hydrogen peroxide production was achieved working at 200 mA but regeneration of ferrous ions was not efficient at this current. Iodide ions were one of the main responsible in the EF efficiency decrease due to their reaction with the produced hydrogen peroxide. Electrochemical study proved that clopyralid was not electroactive and that its degradation was mainly due to radical oxidation. Long duration electrolysis carried out at 200 mA in groundwater provided an improvement of the solution biodegradability after 480 min that can be linked to a significant increase in the carboxylic acids production. These results support the feasibility of applying an EF process in order to carry out a subsequent biological mineralization.
Related Concept Videos
The Soil Ecosystem
Electro-mechanical Systems
A key component of the DC motor is the armature, a rotating circuit positioned within a magnetic field. As an electric current passes through the...
Washing, Drying, and Ignition of Precipitates
Extracorporeal Removal of Drugs: Hemoperfusion and Hemofiltration
Extracorporeal Removal of Drugs: Peritoneal Dialysis and Hemodialysis
Extracorporeal Removal of Drugs: Continuous Renal Replacement Therapy

