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Updated: Sep 26, 2026

Dynamic Electrochemical Measurement of Chloride Ions
Published on: February 5, 2016
Charged body potential monitoring of an electrolyte plume emanating from a dripping source
Robin E Nimmer1, James L Osiensky
1Department of Geological Sciences, University of Idaho, Moscow, Idaho 83844-3022, USA. nimm9536@uidaho.edu
Abstract:
Hole-surface charged body potential (CBP) measurements were taken over a 173-day period during a drip-injection, tracer experiment in partially saturated, fractured basalt. A continuous, enhanced conductivity, potassium chloride (KCl) solution was dripped into the fractured basalt and energized directly through a current electrode placed in the conductive solution. The constant concentration, KCl solution was introduced above a perched water table at an average rate of 10.07 L/day under a constant hydraulic head for 76 days. The KCl drip period was followed by a 34-day tap water drip period and a 62-day drainage period. Hole-surface CBP measurements were taken over time to delineate the evolution of the asymmetrical, vadose zone, plume. A 15 by 15 grid of land surface based, porous pot electrodes (copper sulfate), located symmetrically about the centrally located injection borehole, was used for the hole-surface CBP experiment. Ratios of electrical potentials measured at the land surface over time were contoured and profiled to delineate the evolution of the electrolyte plume.
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