TY - JOUR
T1 - Horizontal and Vertical Distribution of Microplastics in Korean Coastal Waters
AU - Song, Young Kyoung
AU - Hong, Sang Hee
AU - Eo, Soeun
AU - Jang, Mi
AU - Han, Gi Myung
AU - Isobe, Atsuhiko
AU - Shim, Won Joon
N1 - Funding Information:
This study was supported by the Ministry of Oceans and Fisheries, Korea, under the research project titled “Environmental Risk Assessment of Microplastics in the Marine Environment.” AI was supported by the Environment Research and Technology Development Fund (SII-2) of the Ministry of the Environment, Japan.
Publisher Copyright:
Copyright © 2018 American Chemical Society.
Copyright:
Copyright 2019 Elsevier B.V., All rights reserved.
PY - 2018/11/6
Y1 - 2018/11/6
N2 - This is the first survey to investigate the vertical distribution and composition of microplastics >20 μm at the surface (0-0.2 m; bulk sample) and in the water column (3-58 m depth; pump) of six semi-enclosed bays and two nearshore areas of South Korea. The average microplastic abundance of 41 stations at all sampling depths was 871 particles/m 3 , and the microplastic abundance near urban areas (1051 particles/m 3 ) was significantly higher than that near rural areas (560 particles/m 3 ). Although the average microplastic abundances in the midcolumn (423 particles/m 3 ) and bottom water (394 particles/m 3 ) were approximately 4 times lower than that of surface water (1736 particles/m 3 ), microplastics prevailed throughout the water column in concentrations of 10-2000 particles/m 3 . The average sizes of fragment and fiber type microplastics were 197 and 752 μm, respectively. Although the polymer composition differed by depth depending on the particle size and density, polypropylene and polyethylene predominated throughout the water column regardless of their low density and particle size. Finally, the middle and bottom water samples contained higher abundances of microplastics than predicted by a model based on physical mixing, indicating that biological interactions also influence the downward movement of low-density microplastics.
AB - This is the first survey to investigate the vertical distribution and composition of microplastics >20 μm at the surface (0-0.2 m; bulk sample) and in the water column (3-58 m depth; pump) of six semi-enclosed bays and two nearshore areas of South Korea. The average microplastic abundance of 41 stations at all sampling depths was 871 particles/m 3 , and the microplastic abundance near urban areas (1051 particles/m 3 ) was significantly higher than that near rural areas (560 particles/m 3 ). Although the average microplastic abundances in the midcolumn (423 particles/m 3 ) and bottom water (394 particles/m 3 ) were approximately 4 times lower than that of surface water (1736 particles/m 3 ), microplastics prevailed throughout the water column in concentrations of 10-2000 particles/m 3 . The average sizes of fragment and fiber type microplastics were 197 and 752 μm, respectively. Although the polymer composition differed by depth depending on the particle size and density, polypropylene and polyethylene predominated throughout the water column regardless of their low density and particle size. Finally, the middle and bottom water samples contained higher abundances of microplastics than predicted by a model based on physical mixing, indicating that biological interactions also influence the downward movement of low-density microplastics.
UR - http://www.scopus.com/inward/record.url?scp=85055157571&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85055157571&partnerID=8YFLogxK
U2 - 10.1021/acs.est.8b04032
DO - 10.1021/acs.est.8b04032
M3 - Article
C2 - 30295469
AN - SCOPUS:85055157571
VL - 52
SP - 12188
EP - 12197
JO - Environmental Science & Technology
JF - Environmental Science & Technology
SN - 0013-936X
IS - 21
ER -