Differential impact of planktonic and periphytic diatoms on aggregation and sinking of microplastics in a simulated marine environment

被引：7

作者：

Lim, Young Kyun ^{[1
]}

Lee, Kyun-Woo ^{[2
,3
]}

Hong, Sang Hee ^{[1
,2
]}

Park, Jae Gon ^{[2
,3
]}

Baek, Seung Ho ^{[1
,2
]}

机构：

[1] Korea Inst Ocean Sci & Technol KIOST, Ecol Risk Res Dept, Geoje 53201, South Korea

[2] Univ Sci & Technol UST, Dept Ocean Sci, Daejeon 34113, South Korea

[3] Korea Inst Ocean Sci & Technol KIOST, Marine Biotechnol & Bioresource Res Dept, Pusan 49111, South Korea

来源：

MARINE POLLUTION BULLETIN | 2024年 / 199卷

关键词：

Microplastic; Planktonic microalgae; Periphytic microalgae; Aggregation; Sinking; Pollution; EXOPOLYSACCHARIDE-PRODUCING CYANOBACTERIA; NITZSCHIA-PUNGENS BACILLARIOPHYCEAE; PLASTIC DEBRIS; AQUATIC ENVIRONMENTS; ARENICOLA-MARINA; BENTHIC DIATOMS; SNOW; SEA; TRANSPORT; ACCUMULATION;

D O I：

10.1016/j.marpolbul.2023.115961

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

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 PEP. 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.

引用

页数：10

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