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首页> 外文期刊>Atmospheric environment >Magnetic biomonitoring with moss bags to assess stop-and-go traffic induced particulate matter and heavy metal concentrations
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Magnetic biomonitoring with moss bags to assess stop-and-go traffic induced particulate matter and heavy metal concentrations

机译：带有苔藓袋的磁性生物监测器，用于评估走走停停引起的颗粒物和重金属浓度

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Urban air quality is strongly affected by the surrounding local traffic and emission compounds such as particulate matter (PM) and heavy metals, which pose a serious health risk globally. These compounds are known to be traffic related, but fairly few studies have focused on point source emissions of traffic flow. In this study we applied magnetic biomonitoring using moss bags (Sphagnum papillosum) to study the point source emissions caused by stop-and-go traffic. Moss bags were placed alternately at traffic light crossings (n = 19) and midway areas between the crossings (n = 29) along four street transects and one separate traffic light crossing in the city of Turku, Finland. Samples were analysed for mass-specific magnetic susceptibility (chi), hysteresis parameters and elemental components. The PM was composed of fine-grained pseudo-single-domain (PSD) magnetite and the concentrations of chi, Cu, Mo and Sb significantly differed between traffic light crossing areas compared to midway areas. The elements Ba, Cu, Fe, Mo, Ni, Pb, Sb and Ti showed moderate to high levels of accumulation and correlated strongly with chi and saturation magnetisation (M-s). Our results show that a high volume of stop-and-go traffic is a major source of harmful PM pollution especially along busy main roads. To improve urban air quality and public health we strongly advice the municipal administrations to pay more attention to urban planning and traffic management to reduce stop-and-go traffic and decrease the levels of urban PM pollution.
机译：城市空气质量受到周围当地交通和排放化合物（例如颗粒物（PM）和重金属）的强烈影响，这些物质在全球范围内构成严重的健康风险。已知这些化合物与交通有关，但很少有研究集中于交通流的点源排放。在这项研究中，我们应用了使用苔藓袋（泥炭藓）的磁性生物监测技术来研究由停走交通引起的点源排放。在芬兰图尔库市，沿着四个街道横断面和一个单独的交通信号灯十字路口，将苔藓袋交替放置在交通信号灯十字路口（n = 19）和十字路口之间的中间区域（n = 29）。分析样品的质量比磁化率（chi），磁滞参数和元素成分。 PM由细粒度的伪单畴（PSD）磁铁矿组成，交通信号灯穿越区域与中途区域相比，chi，Cu，Mo和Sb的浓度存在显着差异。元素Ba，Cu，Fe，Mo，Ni，Pb，Sb和Ti表现出中等至高水平的积累，并且与chi和饱和磁化强度（M-s）密切相关。我们的结果表明，大量走走停停的交通是有害PM污染的主要来源，尤其是在繁忙的主要道路上。为了改善城市空气质量和公共卫生，我们强烈建议市政当局更加重视城市规划和交通管理，以减少走走停停的交通和降低城市PM污染水平。

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