Department of Environmental Engineering, The Catholic University of Korea, Bucheon 14662, Republic of Korea.
Department of Environmental Engineering, Daegu University, Gyeongsan 38453, Republic of Korea.
Sci Total Environ. 2021 Aug 25;784:147177. doi: 10.1016/j.scitotenv.2021.147177. Epub 2021 Apr 18.
In this study, we examined tire and road wear microparticles (TRWMPs) in road dust along the Seoul metropolitan area, from industrial and residential areas. The road dust samples were collected via vacuum sweep methods and then filtered to obtain particles with diameters less than 75 μm. To quantify the TRWMPs in road dust, we used the raw materials of tire components, natural rubber (NR), and styrene-butadiene rubber (SBR), as standard materials. We evaluated the usability of the pyrolyzer-gas chromatography/mass spectrometry py-GC/MS method introduced in ISO/TS 20593 by confirming the decomposition temperatures of the NR and SBR by thermogravimetric (TG) and evolved gas analysis (EGA)-MS. The average of TRWMPs in industrial and residential area road dust were 22,581 and 9818 μg/g, respectively, indicating that the industrial area has 2.5 times higher TRWMPs concentration. Further, the NR, the main component of truck bus radial, to SBR, the main component of passenger car radial, ratio was slightly higher in the industrial area than in the residential area. This presumably means that the high traffic volume, including heavy duty vehicles in industrial areas, affected the higher concentration of TRWMPs. This study reveals the growing evidence of the importance of TRWMPs in road dust and how TRWMPs quantity can impact the air quality of the Seoul metropolitan area.
在这项研究中，我们检测了首尔大都市区工业和居民区道路灰尘中的轮胎和道路磨损微粒（TRWMPs）。通过真空清扫方法收集道路灰尘样本，然后过滤以获得直径小于 75μm 的颗粒。为了定量道路灰尘中的 TRWMPs，我们使用轮胎成分的原材料，天然橡胶（NR）和丁苯橡胶（SBR）作为标准材料。我们通过热重（TG）和气相分析（EGA-MS）确认 NR 和 SBR 的分解温度，验证了 ISO/TS 20593 中引入的热解器-气相色谱/质谱热解-GC/MS 方法的可用性。工业和居民区道路灰尘中的 TRWMPs 平均值分别为 22581 和 9818μg/g，表明工业区的 TRWMPs 浓度是居民区的 2.5 倍。此外，在工业区中，卡车公共汽车子午线的主要成分 NR 与乘用车子午线的主要成分 SBR 的比例略高于居民区。这大概意味着工业区高交通量，包括重型车辆，影响了 TRWMPs 的高浓度。本研究揭示了道路灰尘中 TRWMPs 的重要性以及 TRWMPs 数量如何影响首尔大都市区的空气质量的日益明显的证据。
