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Desorption of harmful hydrocarbon compounds in soil using micron-sized magnetic particles and high-frequency magnetic fields.

Authors
  • Tye, Bailey S1
  • Vyas, Rushi J1
  • 1 Department of Electrical Engineering, University of Calgary, Calgary, AB T2N1N4, Canada. , (Canada)
Type
Published Article
Journal
Heliyon
Publisher
Elsevier
Publication Date
Oct 01, 2017
Volume
3
Issue
10
Identifiers
DOI: 10.1016/j.heliyon.2017.e00418
PMID: 29034338
Source
Medline
Keywords
License
Unknown

Abstract

This research looks at the use of high frequency (HF) magnetic fields to desorb/reduce harmful chemical compounds within gasoline and diesel that commonly leak out of underground storage tanks. Using a multi-strand coil design, measured magnetic fields of over 3 kilo-amperes per meter are generated at an optimal frequency of 117 kHz without skin-depth losses, and without the use of expensive super-conductors or liquid-cooled mechanisms. This high frequency magnetic field is successfully used in non-contact-based magnetic heating and desorption of Gasoline and Diesel mixed with sand, water and easily-dispersible, benign micrometer-sized iron filings, used as a magnetic absorber. Gas chromatography (GC) tests done on magnetically-heated Gasoline-soil and Diesel-soil mixtures show desorption/reduction of gasoline and diesel by 44% and 51% respectively, but desorption/reduction of harmful BTEX compounds and other chemical irritants within Gasoline and Diesel by 28-66% after only 80 minutes of magnetic heating. Review of remediation/desorption methods show magnetic fields fare favorably in comparison to other methods that require longer treatment period or the use of secondary pollutants at reducing hydrocarbon and BTEX compounds in them.

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