PMID: 16646461May 2, 2006Paper

Low frequency electrical properties of corroded iron barrier cores

Environmental Science & Technology
Yuxin WuNic Korte

Abstract

We investigated the electrical signatures of iron corrosion and mineral precipitation in angle cores from an Fe(0) barrier installation in operation for eight years. The real and imaginary parts of the complex electrical conductivity measured between 0.1 and 1000 Hz were 2-10 times higher (varying between cores) in the reacted zone at the upgradient edge of the barrier relative to less altered locations inside the barrier. Scanning electron microscopy identified iron surface alteration with the thickest corrosion rinds closest to the upgradient soil/iron interface. Surface area of iron minerals was also greatest at the upgradient interface, gradually decreasing into the cores. X-ray diffractometry identified precipitation of iron oxide/hydroxide, carbonate minerals, iron sulfide, as well as green rusts, with mineral complexity decreasing away from the interface. The electrical measurements correlate very well with the solid-phase analyses, and they verify that electrical methods could be used to assess or monitor iron corrosion and mineral precipitation occurring in Fe(0) barriers.

References

Oct 16, 1999·Journal of Hazardous Materials·P D MackenzieT M Sivavec
Oct 22, 2003·Journal of Contaminant Hydrology·W KamolpornwijitA B Sullivan

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Citations

Apr 23, 2013·Journal of Contaminant Hydrology·Yves Robert PersonnaZoltan Szabo
Jun 26, 2014·Journal of Hazardous Materials·Chih-ping Tso, Yang-hsin Shih
Apr 7, 2015·Journal of Contaminant Hydrology·Zhenqing ShiKenneth H Williams

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