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Electro-Kinetic Remediation of Sulphate from Soil

Rathod, Deendayal and Sivapullaiah, P V (2016) Electro-Kinetic Remediation of Sulphate from Soil. In: Geo-Chicago Conference - Sustainability, Energy, and the Environment (Geo-Chicago), AUG 14-18, 2016, Chicago, IL, pp. 213-224.

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Official URL: http://dx.doi.org/10.1061/9780784480168.022


Decontamination of fine-grained soils from ionic pollutants by conventional methods is not only costly but also mostly ineffective because of their low hydraulic conductivity, low biodiversity, and strong adsorption on their surface. To decontaminate soils of low hydraulic conductivity, the application electrical potential along with passing of water under hydraulic gradient has come into vogue. This method is called electro-kinetic remediation. The efficiency of removal of cations near cathode is well established, the removal of anions at anode is not that effective. In this case, the electrical potential causes the migration of anions towards the anode is inhibited by opposing osmotic flow. Hence, the removal of anions by electro-kinetic extraction method is less effective compare to cations, how it will affect the sulphate ion migration has been studied in this paper. From the study, it has been observed that the breakthrough curve of sulphate ion under electrical potential is significantly lower than under advection and diffusion only. It is also concluded that inspite of electro osmotic flow occurring in the opposite direction, the breakthrough of sulphate occurs earlier because of migration of sulphate ion towards anode under electrical gradient.

Item Type: Conference Proceedings
Series.: Geotechnical Special Publication
Additional Information: Copy right for this article belongs to the AMER SOC CIVIL ENGINEERS, UNITED ENGINEERING CENTER, 345 E 47TH ST, NEW YORK, NY 10017-2398 USA
Department/Centre: Division of Mechanical Sciences > Civil Engineering
Date Deposited: 07 Jan 2017 10:04
Last Modified: 07 Jan 2017 10:04
URI: http://eprints.iisc.ac.in/id/eprint/55894

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