Laboratory Experiments on Electrochemical Remediation of the Environment Part 3: Microscale Electrokinetic Processing of Soils

Abstract

Electrochemical remediation of the environment is gaining widespread acceptance due to the mild conditions used, the cleanliness of the electron as a reagent, the easiness for automation, its versatility, etc. In this paper three phenomena are presented at the microscale level, originating from the application of an electric field to a simulated soil sample: a) Demonstration of metal ion migration, b) Demonstration of the creation and movement of an acidic and a basic front, and c) Demonstration of water movement through soil.

Processed wastewater sludge for improvement of mechanical properties of concretes

“…(3), an increase in pH is expected to lead to the formation of insoluble iron hydroxide. The hydroxide should be able to remove contaminants by surface complexation [41] followed by coagulation [42,43]. Namely, the pollutant acts as a ligand (L) to chemically bind hydrous iron:…”

Laboratory Experiments on the Electrochemical Remediation of Environment. Part 4: Color Removal of Simulated Wastewater by Electrocoagulation-Electroflotation

“…In previous experiments we have addressed different ways in which electrochemistry can help achieve environmental remediation (13)(14)(15). In this experiment, an iron electrode (paper clip) is used to provide metallic ions for the formation of an insoluble hydroxide that will adsorb a dye present in the solution.…”

Electrochemical Removal of Metal Cations from Wastewater Monitored by Differential Pulse Polarography

“…Electrochemical processes can contribute to a cleaner environment through the treatment of wastewater by elimination or recycling of pollutants (1)(2)(3). In this Journal, Ibanez et al have reported various interesting applications of electrochemical techniques for wastewater and effluent treatment (4)(5)(6)(7)(8). In the present case the wastewater contaminants are electrochemically active metal cations and therefore electrodeposition is a possible route for their elimination.…”