Technical Director - Hydrogeologist
Ken has a BS (UW-Madison) and MS (Ohio University) in hydrogeology with 40 years of experience in environmental remediation consulting. Ken has worked on over 200 soil and groundwater remediation sites around the world, involving organics and inorganics, using hydrogeochemical principles to develop natural and enhanced remediation, especially for chlorinated VOCs, chlorinated phenols, metals, landfill leachate, and fuels.
Monitoring Zero Valent Iron Concentrations During TCE Degradation using Magnetic Susceptibility
Measuring the magnetic susceptibility of a sample is a fast, simple, and non-destructive method for determining the species in samples that respond to a magnetic field. These species are primarily magnetite in naturally occurring soils and rock and elemental iron (ZVI) where injected for remedial purposes. While more commonly used in geologic investigations, magnetic susceptibility can be used to measure ZVI or magnetite concentrations during the reaction with chlorinated ethenes in abiotic degradation of the contaminants. This paper presents results for a laboratory experiment monitoring loss of ZVI and magnetite during degradation of TCE. The results showed that magnetic susceptibility was an effective tool for monitoring the loss of ZVI during the reaction and the ZVI left in the sample. The results were used to project ZVI longevity in a groundwater TCE plume remediation.