Interlinked water and sediment microplastics in the Laizhou Bay of China

Hong CHEN; Fenghua JIANG; Jingxi LI; Wei CAO; Di ZHANG; Futao ZHANG; Shiliang WANG; Chengjun SUN

doi:10.1007/s00343-024-4032-x

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Interlinked water and sediment microplastics in the Laizhou Bay of China

Micro- and nano-plastics in marine environments | Updated：2025-03-21

- Interlinked water and sediment microplastics in the Laizhou Bay of China
- Journal of Oceanology and Limnology Vol. 43, Issue 2, Pages: 446-458(2025)
- Affiliations：
  
  1.College of Safety and Environmental Engineering, Shandong University of Science and Technology, Qingdao 266590, China
  2.Key Laboratory of Analytical Technology Development and Offshore Eco-Environment Conservation, First Institute of Oceanography, Ministry of Natural Resources, Qingdao 266061, China
  3.Qingdao National Laboratory of Marine Science and Technology, Laboratory of Marine Drugs and Biological Products, Qingdao 266071, China
- Author bio：
  
  jxli@fio.org.cn
  csun@fio.org.cn
- Funds：
- DOI：10.1007/s00343-024-4032-x
  CLC：
- Received：26 January 2024，
  
  Published：01 March 2025
- Accepted：
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CHEN Hong,JIANG Fenghua,LI Jingxi,et al.Interlinked water and sediment microplastics in the Laizhou Bay of China[J].Journal of Oceanology and Limnology,2025,43(02):446-458.
DOI：

CHEN Hong,JIANG Fenghua,LI Jingxi,et al.Interlinked water and sediment microplastics in the Laizhou Bay of China[J].Journal of Oceanology and Limnology,2025,43(02):446-458. DOI： 10.1007/s00343-024-4032-x.

摘要

Abstract

To explore the relationship of microplastic pollution in different media in marine environment

microplastics in the surface seawater and sediments of Laizhou Bay

Bohai Sea

North China

were studied. Seawater samples were collected using a pre-concentrator equipped with a 20-μm mesh size sieve

and sediment samples were collected by a box sampler. The shape

color

size

and type of microplastics were obtained by a stereomicroscope and a Fourier transform infrared spectrometer (ATR-μ-FT-IR). Results show that the abundance of microplastics in the surface seawater of Laizhou Bay was 858.3±573.2 items/m

and that of microplastics in sediments was 151.0±77.4 ‍items/kg ‍dry weight (d.w.) The microplastics in seawater and sediments were mainly fibrous. Meanwhile

the microplastics in seawater were mainly transparent

and those in sediments were transparent and blue. The highest proportion of microplastics in seawater was rayon (77.48%)

followed by polyethylene terephthalate (PET

13.17%). The h

ighest proportion of microplastics in sediments was rayon (73.66%)

followed by PET (8.90%). The size of microplastics in 1 000–2 000 μm accounted for the largest proportion of 28.54% in seawater

while that in 500–1 000 μm took 27.93% in sediment. Microplastics in seawater and sediment showed medium-level pollution. In seawater

microplastic abundance was higher in offshore and nearshore areas of Weifang. In sediment

microplastic abundance was higher in offshore and nearshore areas of Dongying. The results of the principal component analysis (PCA) indicated that microplastics in sediment exhibited greater stability compared to those in seawater. The microplastics in seawater and sediment show a positive correlation in terms of shape and plastic type

while exhibiting a negative correlation in terms of color. Overall

microplastics in sediments were smaller in size

and those in seawater and sediments had consistent size distribution characteristics in space.

关键词

Keywords

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