Tracing of traffic-related pollution using magnetic properties of topsoils in Daejeon, Korea
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ORIGINAL ARTICLE
Tracing of traffic‑related pollution using magnetic properties of topsoils in Daejeon, Korea Seungwoo Lee1 · Seoyeon Kim1 · Hyeji Kim1 · Youlee Seo1 · Yeoncheol Ha1 · Hanul Kim2 · Raegyung Ha2 · Yongjae Yu1,2 Received: 9 April 2020 / Accepted: 21 September 2020 © The Author(s) 2020
Abstract The present study was designed to explore the possibility of roadside pollution screening using magnetic properties of topsoil samples in Daejeon, South Korea. Low-field magnetic susceptibility, frequency dependence of magnetic susceptibility, susceptibility of anhysteretic remanent magnetization, isothermal remanent magnetization (IRM) acquisition and demagnetization, back-field IRM treatment, and thermal demagnetization of composite IRM were determined for roadside topsoil samples. Magnetic susceptibility measured on 238 samples from the upper 5 cm of the topsoils ranged from 8.6 to 82.5 × 10–5 SI with a mean of 28.3 ± 10.8 × 10–5 SI. The proximal zone, 55 m wide area situated on either side of the main street, exhibited an enhancement of magnetic susceptibility. In areas distant from the main street, low magnetic susceptibility (
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