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Article ? AI-assigned paper type based on the abstract. Classification may not be perfect — flag errors using the feedback button. Tier 2 ? Original research — experimental, observational, or case-control study. Direct primary evidence. Detection Methods Environmental Sources Marine & Wildlife Policy & Risk Remediation Sign in to save

Microplastic emission characteristics of stormwater runoff in an urban area: Intra-event variability and influencing factors

2023 7 citations ? Citation count from OpenAlex, updated daily. May differ slightly from the publisher's own count. Score: 40 ? 0–100 AI score estimating relevance to the microplastics field. Papers below 30 are filtered from public browse.
Youna Cho, Gi Myung Han, Youna Cho, Youna Cho, Won Joon Shim Youna Cho, Youna Cho, Gi Myung Han, Won Joon Shim Youna Cho, Sung Yong Ha, Sung Yong Ha, Sang Hee Hong, Sang Hee Hong, Sang Hee Hong, Won Joon Shim Won Joon Shim Gi Myung Han, Sung Yong Ha, Mi Jang, Mi Jang, Mi Jang, Mi Jang, Won Joon Shim Youna Cho, Won Joon Shim Won Joon Shim Sang Hee Hong, Sang Hee Hong, Sang Hee Hong, Won Joon Shim Sang Hee Hong, Sang Hee Hong, Sang Hee Hong, Sang Hee Hong, Sang Hee Hong, Sang Hee Hong, Sang Hee Hong, Won Joon Shim Won Joon Shim Sang Hee Hong, Won Joon Shim Youna Cho, Won Joon Shim Won Joon Shim Won Joon Shim Sung Yong Ha, Gi Myung Han, Sung Yong Ha, Won Joon Shim Sung Yong Ha, Won Joon Shim Won Joon Shim Sang Hee Hong, Won Joon Shim Sang Hee Hong, Won Joon Shim Sang Hee Hong, Sang Hee Hong, Won Joon Shim Sang Hee Hong, Won Joon Shim Won Joon Shim Sang Hee Hong, Won Joon Shim Sang Hee Hong, Sang Hee Hong, Sang Hee Hong, Sang Hee Hong, Sang Hee Hong, Sang Hee Hong, Sang Hee Hong, Sang Hee Hong, Won Joon Shim Sang Hee Hong, Sung Yong Ha, Gi Myung Han, Youna Cho, Sang Hee Hong, Sang Hee Hong, Youna Cho, Won Joon Shim Gi Myung Han, Sang Hee Hong, Gi Myung Han, Sang Hee Hong, Gi Myung Han, Won Joon Shim Gi Myung Han, Gi Myung Han, Won Joon Shim Sang Hee Hong, Won Joon Shim Sang Hee Hong, Sang Hee Hong, Sung Yong Ha, Sung Yong Ha, Mi Jang, Mi Jang, Youna Cho, Sung Yong Ha, Youna Cho, Mi Jang, Mi Jang, Gi Myung Han, Mi Jang, Mi Jang, Mi Jang, Mi Jang, Mi Jang, Mi Jang, Won Joon Shim Gi Myung Han, Won Joon Shim Youna Cho, Won Joon Shim Gi Myung Han, Youna Cho, Sung Yong Ha, Youna Cho, Gi Myung Han, Youna Cho, Youna Cho, Youna Cho, Gi Myung Han, Gi Myung Han, Gi Myung Han, Gi Myung Han, Gi Myung Han, Gi Myung Han, Gi Myung Han, Gi Myung Han, Gi Myung Han, Gi Myung Han, Gi Myung Han, Gi Myung Han, Gi Myung Han, Gi Myung Han, Sung Yong Ha, Sung Yong Ha, Sang Hee Hong, Sang Hee Hong, Sang Hee Hong, Sang Hee Hong, Sang Hee Hong, Sang Hee Hong, Sang Hee Hong, Sang Hee Hong, Sang Hee Hong, Sang Hee Hong, Sang Hee Hong, Sang Hee Hong, Sang Hee Hong, Sang Hee Hong, Sang Hee Hong, Sang Hee Hong, Sang Hee Hong, Sang Hee Hong, Won Joon Shim Won Joon Shim Won Joon Shim Won Joon Shim Won Joon Shim Won Joon Shim Won Joon Shim Won Joon Shim Mi Jang, Mi Jang, Mi Jang, Mi Jang, Mi Jang, Gi Myung Han, Mi Jang, Won Joon Shim Gi Myung Han, Gi Myung Han, Sang Hee Hong, Won Joon Shim Sung Yong Ha, Sang Hee Hong, Sang Hee Hong, Won Joon Shim Won Joon Shim Mi Jang, Won Joon Shim Sang Hee Hong, Sung Yong Ha, Gi Myung Han, Won Joon Shim Won Joon Shim Gi Myung Han, Won Joon Shim Sung Yong Ha, Won Joon Shim Sung Yong Ha, Mi Jang, Gi Myung Han, Gi Myung Han, Won Joon Shim Sang Hee Hong, Sang Hee Hong, Won Joon Shim Sang Hee Hong, Sang Hee Hong, Won Joon Shim Sang Hee Hong, Sang Hee Hong, Won Joon Shim Sang Hee Hong, Sang Hee Hong, Won Joon Shim Sang Hee Hong, Won Joon Shim Sung Yong Ha, Sung Yong Ha, Mi Jang, Gi Myung Han, Youna Cho, Won Joon Shim Won Joon Shim Sang Hee Hong, Won Joon Shim Sung Yong Ha, Won Joon Shim Sung Yong Ha, Sang Hee Hong, Sang Hee Hong, Won Joon Shim Won Joon Shim Sang Hee Hong, Gi Myung Han, Mi Jang, Sang Hee Hong, Sang Hee Hong, Won Joon Shim Sang Hee Hong, Sang Hee Hong, Gi Myung Han, Mi Jang, Mi Jang, Youna Cho, Youna Cho, Gi Myung Han, Won Joon Shim Gi Myung Han, Won Joon Shim Won Joon Shim Won Joon Shim Won Joon Shim Won Joon Shim Won Joon Shim Won Joon Shim

Summary

Researchers found that stormwater runoff from both industrial and residential urban catchments contained substantial microplastics (54–639 particles per liter), with polypropylene and polyethylene dominating, and that microplastic concentrations peaked early in rain events following longer dry periods.

Polymers
PE PP
Study Type Environmental

Stormwater runoff is considered a major pathway for land-based microplastic transportation to aquatic environments. By applying time-weighted stormwater sampling at stormwater outlets from industrial and residential catchments, we investigated the emission characteristics and loads (number- and mass-based) of microplastics to aquatic environments through urban stormwater runoff during rainfall events. Microplastics were detected in stormwater runoff from industrial and residential catchments in the concentration range of 68-568 n/L and 54-639 n/L, respectively. Polypropylene and polyethylene were found as major polymers accounting for around 60% of total microplastics. The fragment was the dominant shape of microplastics, and the most common size class were 20-100 μm or 100-200 μm. The microplastic load emitted from industrial and residential catchments were estimated to be 1.54 - 46.1 x 108 and 0.63 - 28.5 x 108 particles, respectively. The discharge characteristics of microplastics inter– and intra–event were affected by the land-use pattern and rainfall characteristics. The concentration of microplastics did not significantly differ between industrial and residential catchments, but the composition of polymer types reflected the land-use pattern. The microplastics in stormwater were more concentrated when the number of antecedent dry days (ADDs) was higher; the concentration of microplastics was generally peaked in the early stage of runoff and varied according to rainfall intensity during a rainfall event. The contamination level and load of microplastics were heavily affected by the total rainfall depth. Most microplastics were transported in the early stage of runoff (19–37% of total runoff time), but the proportion of larger and heavier particles increased in the later period of runoff. The microplastic emission via stormwater runoff was significantly higher than that through the discharge of wastewater treatment plant effluent in the same area, implying that stormwater runoff is the dominant pathway for transporting microplastics to aquatic environments.  

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