Tye Bailey S, Vyas Rushi J
Department of Electrical Engineering, University of Calgary, Calgary, AB T2N1N4, Canada.
Heliyon. 2017 Oct 10;3(10):e00418. doi: 10.1016/j.heliyon.2017.e00418. eCollection 2017 Oct.
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.
本研究着眼于利用高频（HF）磁场来解吸/减少汽油和柴油中常见的有害化合物，这些化合物通常会从地下储油罐中泄漏出来。采用多股线圈设计，在117 kHz的最佳频率下可产生超过每米3千安培的实测磁场，且不存在趋肤深度损耗，也无需使用昂贵的超导体或液冷机制。这种高频磁场成功应用于对与沙子、水以及用作磁吸收剂的易分散、良性微米级铁屑混合的汽油和柴油进行非接触式磁加热和解吸。对经磁加热的汽油 - 土壤和柴油 - 土壤混合物进行的气相色谱（GC）测试表明，汽油和柴油的解吸/减少率分别为44%和51%，但在仅80分钟的磁加热后，汽油和柴油中有害的BTEX化合物及其他化学刺激物的解吸/减少率为28% - 66%。对修复/解吸方法的综述表明，与其他需要更长处理时间或使用二次污染物的方法相比，磁场在减少其中的碳氢化合物和BTEX化合物方面表现良好。
