Differential impact of planktonic and periphytic diatoms on aggregation and sinking of microplastics in a simulated marine environment
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Title
- Differential impact of planktonic and periphytic diatoms on aggregation and sinking of microplastics in a simulated marine environment
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Author(s)
- Lim, Young Kyun; Lee, Kyun Woo; Hong, Sang Hee; Park, Jae Gon; Baek, Seung Ho
- KIOST Author(s)
- Lim, Young Kyun(임영균); Lee, Kyun Woo(이균우); Hong, Sang Hee(홍상희); Park, Jae Gon(박재곤); Baek, Seung Ho(백승호)
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Alternative Author(s)
- 임영균; 이균우; 홍상희; 박재곤; 백승호
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Publication Year
- 2024-02
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Abstract
- Aggregation between microalgae and microplastics (MPs) significantly influences the MPs distribution in marine environment. We investigated the effects of two diatoms, the planktonic Pseudo-nitzschia pungens and the periphytic Navicula sp., on the formation and sinking of aggregates when they were cultured with four different types of MPs: small and large polyethylene terephthalate (PET) fibers, and low-density and high-density polyethylene (PE) spheres. Navicula sp. formed aggregates with all MPs within one week, but P. pungens only formed aggregates with PE spheres after 9 weeks. The PE-Navicula sp. aggregates settled about 100 times faster than the PE-P. pungens aggregates (12.2 vs. 0.1 mm s−1), and this difference was most likely due to aggregate shape rather than size. Our findings indicate that the periphytic Navicula sp. had a greater effect on the settling of MPs than the planktonic P. pungens. These findings have implications for understanding the behavior of MPs in marine environments. © 2023
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ISSN
- 0025-326X
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URI
- https://sciwatch.kiost.ac.kr/handle/2020.kiost/45370
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DOI
- 10.1016/j.marpolbul.2023.115961
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Bibliographic Citation
- Marine Pollution Bulletin, v.199, 2024
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Publisher
- Pergamon Press Ltd.
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Keywords
- Aggregation; Microplastic; Periphytic microalgae; Planktonic microalgae; Pollution; Sinking
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Type
- Article
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Language
- English
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Document Type
- Article
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