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Microplastic quantification affected by structure and pore size of filters

Chemosphere 2020 104 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.

Qiqing Chen, Qiqing Chen, Qiqing Chen, Huahong Shi, Qiqing Chen, Qiqing Chen, Huahong Shi, Qiqing Chen, Qiqing Chen, Qiqing Chen, Qiqing Chen, Qiqing Chen, Huahong Shi, Huiwen Cai, Huiwen Cai, Huiwen Cai, Huiwen Cai, Huiwen Cai, Fangni Du Fangni Du Fangni Du Qiqing Chen, Qiqing Chen, Qiqing Chen, Qiqing Chen, Huahong Shi, Huahong Shi, Huahong Shi, Qiqing Chen, Qiqing Chen, Qiqing Chen, Jingfu Liu, Mengdi Chen, Mengdi Chen, Fangni Du Fangni Du Fangni Du Fangni Du Huiwen Cai, Huiwen Cai, Huiwen Cai, Huiwen Cai, Huiwen Cai, Huiwen Cai, Qiqing Chen, Qiqing Chen, Qiqing Chen, Qiqing Chen, Qiqing Chen, Qiqing Chen, Qiqing Chen, Qiqing Chen, Huahong Shi, Qiqing Chen, Huahong Shi, Huahong Shi, Huahong Shi, Huahong Shi, Huahong Shi, Fangni Du Fangni Du Qiqing Chen, Qiqing Chen, Huahong Shi, Huahong Shi, Fangni Du Jingfu Liu, Huiwen Cai, Huahong Shi, Qiqing Chen, Huiwen Cai, Qiqing Chen, Qiqing Chen, Huahong Shi, Qiqing Chen, Qiqing Chen, Jingfu Liu, Qiqing Chen, Qiqing Chen, Qiqing Chen, Fangni Du Fangni Du Fangni Du Huahong Shi, Huahong Shi, Huiwen Cai, Huahong Shi, Qiqing Chen, Huahong Shi, Huahong Shi, Huahong Shi, Huiwen Cai, Huahong Shi, Huahong Shi, Huahong Shi, Huahong Shi, Qiqing Chen, Huahong Shi, Huahong Shi, Huahong Shi, Huahong Shi, Huahong Shi, Huahong Shi, Qiqing Chen, Qiqing Chen, Huahong Shi, Qiqing Chen, Jingfu Liu, Jingfu Liu, Qiqing Chen, Jingfu Liu, Jingfu Liu, Qiqing Chen, Qiqing Chen, Qiqing Chen, Jingfu Liu, Jingfu Liu, Qiqing Chen, Huahong Shi, Huahong Shi, Huahong Shi, Huahong Shi, Huahong Shi, Huahong Shi, Huahong Shi, Huahong Shi, Huahong Shi, Huahong Shi, Huahong Shi, Huahong Shi, Huahong Shi, Huahong Shi, Huiwen Cai, Huahong Shi, Jingfu Liu, Jingfu Liu, Huahong Shi, Qiqing Chen, Qiqing Chen, Huahong Shi, Qiqing Chen, Qiqing Chen, Huahong Shi, Huahong Shi, Huahong Shi, Fangni Du Huahong Shi, Huahong Shi, Huahong Shi, Huahong Shi, Huiwen Cai, Huahong Shi, Jingfu Liu, Huahong Shi, Huahong Shi, Huahong Shi, Jingfu Liu, Qiqing Chen, Huahong Shi, Huahong Shi, Qiqing Chen, Huahong Shi, Huahong Shi, Huahong Shi, Huahong Shi, Jingfu Liu, Huahong Shi, Huahong Shi, Huahong Shi, Huahong Shi, Huahong Shi, Huahong Shi, Huahong Shi, Huahong Shi, Huahong Shi, Huahong Shi, Huahong Shi, Huahong Shi, Huahong Shi, Huahong Shi, Huahong Shi, Huahong Shi, Huahong Shi, Qiqing Chen, Huahong Shi, Jingfu Liu, Jingfu Liu, Jingfu Liu, Jingfu Liu, Jingfu Liu, Jingfu Liu, Huahong Shi, Huahong Shi, Huahong Shi, Huahong Shi, Huahong Shi, Huahong Shi, Huahong Shi, Qiqing Chen, Huahong Shi, Huahong Shi, Huahong Shi, Jingfu Liu, Huahong Shi, Jingfu Liu, Huahong Shi, Huahong Shi, Huahong Shi, Huahong Shi, Qiqing Chen, Huahong Shi, Huahong Shi, Jingfu Liu, Huahong Shi, Qiqing Chen, Huahong Shi, Huahong Shi, Huahong Shi, Qiqing Chen, Jingfu Liu, Jingfu Liu, Jingfu Liu, Jingfu Liu, Jingfu Liu, Huahong Shi, Huahong Shi, Huahong Shi, Huahong Shi, Huahong Shi, Huahong Shi, Jingfu Liu, Huahong Shi, Jingfu Liu, Jingfu Liu, Huahong Shi, Huahong Shi, Huahong Shi, Jingfu Liu, Qiqing Chen, Huahong Shi, Huahong Shi, Fangni Du Huahong Shi, Huahong Shi, Fangni Du

Summary

Researchers demonstrated that the structure and pore size of filters used in microplastic research significantly affect quantification outcomes, finding that nylon double-layer-hole filters retained nearly all large microplastics while depth-filtration filters showed variable capture rates depending on particle size. The study highlights that filter choice is a critical methodological variable that can lead to inconsistent microplastic concentration estimates across studies.

Polymers

PC nylon

Filters of various structures (filter by pore depth or pore width) and pore sizes are used to extract microplastics (<5 mm) in researches. In present study, we demonstrate that filters with different structures and pore sizes can lead to different outcomes in microplastic filtering. Our results showed that when filtering large-sized microplastics, nylon filter (double-layer-hole type) retained nearly 100% of fibers, while polycarbonate filter (single-layer-hole type) only retained 61.7%. Polycarbonate filter retained the most fragments (80.8%), while cotton fiber filter (multilayer-hole type) retained the least (54.4%). Pellets were retained on different layers of nylon and cotton fiber filters, and could not be quantified accurately. Additionally, the sizes of some fibers and fragments captured were not within the expected ranges by lattice-knitting filters. Large fiber (3568.0 μm) was not filtered out after 1000 μm pore-size filtration. Small fragment (37.2 μm) was found on 50 μm pore-size filters. To validate laboratory results, filed waters containing microplastics (∼90% in form of fibers) were filtered through different pore-size filters. As expected, the relationship between abundance and pore size followed a same trend as that in laboratory fiber samples. Thereby, our results indicated that filter structure and pore size could affect the abundances of microplastics with different shapes. To obtain more accurate abundance of microplastics in a wide size range, and to consider filtration duration, size limitation of observation, and spatial resolution of identification instrument, we recommend that water samples should be filtered using 20 μm pore-size filters with a double-layer-hole type of structure.

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