Interlinked water and sediment microplastics in the Laizhou Bay of China  

作　　者：Hong CHEN Fenghua JIANG Jingxi LI Wei CAO Di ZHANG Futao ZHANG Shiliang WANG Chengjun SUN 

机构地区：[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

出　　处：《Journal of Oceanology and Limnology》2025年第2期446-458,共13页海洋湖沼学报(英文)

基　　金：the Laoshan Laboratory(No.LSKJ202203901);the Natural Science Foundation of Shandong Province,China(No.ZR2021MD079);the APEC Cooperation Fund(No.WJ1323001);the Asian Cooperation Fund(Nos.WJ1223001,WJ0923015)。

摘　　要：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~3,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 highest proportion of microplastics in sediments was rayon(73.66%),followed by PET(8.90%).The size of microplastics in 1000-2000μm accounted for the largest proportion of 28.54%in seawater,while that in 500-1000μm 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：microplastic Laizhou Bay SEDIMENT seawater CORRELATION 

分 类 号：X55[环境科学与工程—环境工程]