Electrical properties of iron-sand columns: Implications for induced pol

journal_title：Geophysics
Contributor：Lee D. Slater ; Jaeyoung Choi ; Yuxin Wu
Publisher：Society of Exploration Geophysicists
Date：2005-
Format：text/html
Language：en
Identifier：10.1190/1.1990218
journal_abbrev：Geophysics
issn：0016-8033
volume：70
issue：4
firstpage：G87
section：ELECTRICAL AND ELECTROMAGNETIC METHODS

摘要

We investigate the electrical response (0.1–1000 Hz) of reactive iron barriers by making measurements on zero valent iron ( $\text{[math]}$ )-sand columns under the following conditions: (1) variable $\text{[math]}$ surface area (0.1–100% by volume $\text{[math]}$ under constant electrolyte chemistry; (2) variable electrolyte activity (0.01–1 mol/liter), valence (mono trivalent), and pH under constant $\text{[math]}$ -sand composition; and (3) forced precipitation of iron hydroxides and iron carbonates on the $\text{[math]}$ surface. We model the measurements in terms of conduction magnitude, polarization magnitude, and polarization relaxation time. Our key findings are:

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