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Cited by 264

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Occurrence and characteristics of microplastics in surface road dust in Kusatsu (Japan), Da Nang (Vietnam), and Kathmandu (Nepal)

Yukioka, Satoru, Tanaka, Shuhei, Nabetani, Yoshiki, Suzuki, Yuji, Ushijima, Taishi, Fujii, Shigeo, Takada, Hideshige, Van Tran, Quang, Singh, Sangeeta·2020·Environmental Pollution

Abstract

Microplastics (MPs, plastics < 5 mm) are a growing concern in ecosystems, being found in the soil and water environment. One of the primary sources of MPs has been suspected to be road dust in urban areas as it can flow into waters with runoff. To understand the occurrence of MPs (100 μm-5 mm) in surface road dust of three cities (Kusatsu, Shiga, Japan; Da Nang, Vietnam; and Kathmandu, Nepal), we collected surface road dust samples. The samples were pretreated (organic matter decomposition and gravity separation), and all MP candidates were individually observed by microscope for color, shape, and size; and analyzed their polymer types using fourier transform infrared spectrometry. The abundances of MPs 100 μm to 5 mm in size were 2.0 ± 1.6 pieces/m2 (13 polymer types) in Kusatsu, 19.7 ± 13.7 pieces/m2 in Da Nang (14 types), and 12.5 ± 10.1 pieces/m2 in Kathmandu (15 types). We classified the MPs into two groups; containers/packaging-MPs and rubber-MPs. Among all MPs, the containers/packaging-MPs accounted for 55 ± 5% of the polymer types composition. In contrast, the rubber-MPs accounted for 16 ± 6% of all MPs which were higher than those previously published for environmental water and sediment samples. The containers/packaging-MPs were fragments of various colors while most of the rubber-MPs were fragments or granules in black. The number-size distributions of MPs showed that the mode of formation explains the differences between their polymer types (tearing for containers/packaging-MPs and abrasion for rubber-MPs). In Da Nang and Kathmandu, the abundance of containers/packaging-MPs and rubber-MPs were correlated so that those MPs might be micronized from the originated materials in the sources with the similar composition (e.g. dump points). It was indicated that the characteristics of MPs pollution in surface road dust might be different depending on waste management practices.

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Metadata

Authors
Yukioka, S., Tanaka, S., Nabetani, Y., Suzuki, Y., Ushijima, T., Fujii, S., Takada, H., Van Tran, Q., & Singh, S.
Venue
Environmental Pollution
Publisher
Elsevier BV
Published
2020-01
Volume
256
Pages
113447
ISSN
0269-7491 (ISSN-L)
OpenAlex
W2981572599
Cited by
264
References
8
FWCI
6.39
Type
journal article
Language
en
Open access
closed

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CoChat. (2026). Citation check: Occurrence and characteristics of microplastics in surface road dust in Kusatsu (Japan), Da Nang (Vietnam), and Kathmandu (Nepal). https://app.cochat.ai/papers/10.1016/j.envpol.2019.113447
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Yukioka, S., Tanaka, S., Nabetani, Y., Suzuki, Y., Ushijima, T., Fujii, S., Takada, H., Van Tran, Q., & Singh, S. (2020). Occurrence and characteristics of microplastics in surface road dust in Kusatsu (Japan), Da Nang (Vietnam), and Kathmandu (Nepal). Environmental Pollution. https://doi.org/10.1016/j.envpol.2019.113447

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