Development of a magnetic hybrid filter to reduce PM10 in a subway platform

Youn-Suk Son; Yong-Hwan Oh; In-Young Choi; Trieu-Vuong Dinh; Sang-Gwi Chung; Jai-Hyo Lee; Duckshin Park; Jo-Chun Kim

doi:10.1016/j.jhazmat.2019.01.045

Development of a magnetic hybrid filter to reduce PM10 in a subway platform

J Hazard Mater. 2019 Apr 15:368:197-203. doi: 10.1016/j.jhazmat.2019.01.045. Epub 2019 Jan 16.

Authors

Youn-Suk Son¹, Yong-Hwan Oh², In-Young Choi², Trieu-Vuong Dinh², Sang-Gwi Chung², Jai-Hyo Lee³, Duckshin Park⁴, Jo-Chun Kim⁵

Affiliations

¹ Department of Environmental Engineering, Pukyong National University, 45 Yongso-ro, Nam-gu, Busan, 48513, Republic of Korea.
² Department of Civil and Environmental Engineering, Konkuk University, 120 Neungdong-ro, Gwangjin-Gu, Seoul, 05029, Republic of Korea.
³ Department of Mechanical Engineering, Konkuk University, 120 Neungdong-ro, Gwangjin-Gu, Seoul, 05029, Republic of Korea.
⁴ Transportation Environmental Research Team and Subway Indoor Air Quality Corps, Korea Railroad Research Institute, 176 Cheoldobakmulkwan-ro, Uiwang-si, Gyeonggi-do, 16105, Republic of Korea.
⁵ Department of Civil and Environmental Engineering, Konkuk University, 120 Neungdong-ro, Gwangjin-Gu, Seoul, 05029, Republic of Korea. Electronic address: jckim@konkuk.ac.kr.

PMID: 30677651
DOI: 10.1016/j.jhazmat.2019.01.045

Abstract

This study investigated the reduction of particulate matter (PM) in a subway platform using self-developed magnetic hybrid filters (magnet-magnet (MM) and magnet-cascade (MC) filter). The magnetic hybrid filter systems were installed and operated in Jegi-dong subway station (J station) platform. The removal efficiency of PM₁₀ (particular matter with aerodynamic diameter less than 10 μm) was evaluated according to various influencing factors such as the combination of filters, linear velocity, and operating conditions of trains. As a result, the average removal efficiency of the MC filter (40.5%) was higher than that of the MM one (27.0%). The maximum PM₁₀ removal efficiencies by MM (34.1%) and MC (47.2%) filters were observed at 20 (linear velocity: 2.41 m/s) and 30 jog (8 m/s) dials, respectively. We additionally found that the removal efficiency of PM₁₀ using MM and MC filters suddenly decreased when the concentration of background PM₁₀ in the platform increased. Based on the results of this study, hybrid technology using two or more capture principles can remove PM more efficiently than technology using a single such principle.

Keywords: Magnet filter; PM(10); Particular matter (PM); Removal efficiency; Subway platform.

Publication types

Research Support, Non-U.S. Gov't