کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8943240 | 1645142 | 2018 | 34 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Does magnification of SEM image influence quantification of particulate matters deposited on vegetation foliage
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The metrics used to quantify the particles on the leaf surface can serve as indicators for the quality of the atmospheric environment and is employed to evaluate the ecosystem services that plants can provide. Magnification of an SEM image may affect the recognition of particles in various aspects, yet little research has examined the impact. In this study, images were obtained at magnifications of 500Ã, 1000Ã, 2000Ã, and 5000à for a widely planted vegetation fence species in Beijing: Euonymus japonicas. Particle amount per leaf area increased as magnification increased; the percentage of the leaf area covered by particles was a relatively stable index across magnifications at around 7% except for the magnification 2000à which was around 15%; and the weight of particles per leaf area was unstable over all magnifications. The mean area of each particle decreased from 5.68â¯Î¼m2 at magnification 500à to 0.20 at magnification 5000Ã, and shape complexity increased as magnification increased from 1.29 at magnification 500à to 1.50 at magnification 5000Ã. Particles with a diameter of less than 2.5â¯Î¼m are more sensitive to scale than particles with a diameter greater than 2.5â¯Î¼m of judged by the differences of the characteristics, diameter, area and shape index, of particles with different diameter ranges over four magnifications. Regarding the percentage characteristic, the percentage of particles with a diameter smaller than 1â¯Î¼m increased as the magnification increased and accounted for 46% at magnification 500à and 96% at magnification 5000Ã. The percentage of particles with an area smaller than 1â¯Î¼m2 also increased as the magnification increased accounting for 56% at magnification 500à and 99% at magnification 5000Ã. Particles with shape index between 1-1.5 accounted for most of the particles across all four magnifications of which the percentage was 0.66-0.80. Therefore, when comparing the results from different magnifications, three factors should be considered carefully: magnification, quantification index, and particle size range. The revealed relationship of the factors can facilitate the understanding of the metrics as indicators for atmospheric environments and vegetation as a sink for atmospheric particles to improve the urban environment.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Micron - Volume 115, December 2018, Pages 7-16
Journal: Micron - Volume 115, December 2018, Pages 7-16
نویسندگان
Lin Lin, Jingli Yan, Guojian Chen, Rongli Tang, Le Bao, Keming Ma, Weiqi Zhou, Xiu Yuan, Zhe Yin, Shuwen Zhou,