کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6336521 | 1620336 | 2016 | 11 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Traffic signatures in suspended dust at pedestrian levels in semiarid zones: Implications for human exposure
ترجمه فارسی عنوان
امضاهای ترافیکی در گرد و غبار معلق در سطوح عابر پیاده در ناحیه های نیمه خالی: پیامدهایی برای قرار گرفتن در معرض انسانی
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کلمات کلیدی
گرد و خاک، قرار گرفتن در معرض عابر پیاده، فلزات، مناطق نیمه دولتی،
موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
علم هواشناسی
چکیده انگلیسی
Deeper knowledge on dust suspension processes along semiarid zones is critical for understanding potential impacts on human health. Hermosillo city, located in the heart of the Sonoran Desert was chosen to evaluate such impacts. A one-year survey of Total Suspended Particulate Matter (TSPM) was conducted at two different heights (pedestrian and rooftop level). The minimum values of TSPM were reported during monsoon season and winter. Maximum values showed a bimodal distribution, with major peaks associated with increase and decrease of temperature, as well as decreasing humidity. Concentrations of TSPM were significantly exceeded at pedestrian level (â¼44% of analyzed days) when compared to roof level (â¼18% of analyzed days). Metal concentrations of As, Pb, Cu, Sb, Be, Mg, Ni, and Co were higher at pedestrian level than at roof level. Pixel counting and interpretations based on scanning electron microscopy of dust filters showed a higher percentage of fine particulate fractions at pedestrian level. These fractions occur mainly as metal-enriched agglomerates resembling coarser particles. According to worldwide guidelines, particulate matter sampling should be conducted by monitoring particle sizes equal and inferior to PM10. However, this work suggests that such procedures may compromise risk assessment in semiarid environments, where coarse particles act as main carriers for emergent contaminants related to traffic. This effect is especially concerning at pedestrian level, leading to an underestimation of potential impacts of human exposure. This study brings forward novel aspects that are of relevance for those concerned with dust suspension processes across semiarid regions and related impact on human health.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Atmospheric Environment - Volume 138, August 2016, Pages 4-14
Journal: Atmospheric Environment - Volume 138, August 2016, Pages 4-14
نویسندگان
Diana Meza-Figueroa, Belem González-Grijalva, Rafael Del RÃo-Salas, Rute Coimbra, Lucas Ochoa-Landin, Verónica Moreno-RodrÃguez,