期刊
SCIENCE OF THE TOTAL ENVIRONMENT
卷 633, 期 -, 页码 1206-1216出版社
ELSEVIER
DOI: 10.1016/j.scitotenv.2018.03.197
关键词
Microplastic; Distribution; Seawater; Inventory; Marginal sea; South China Sea
资金
- National Natural Science Foundation of China (NSFC) [41776088, 40776040, 41576180]
- Senior Project of Big Science Instrument Office, Institute of Oceanology, Chinese Academy of Sciences [KEXUE2016G01, KEXUE2017G09]
- Natural Science Foundation Fujian Province [2014J06014]
- Xiamen University Training Program of Innovation and Entrepreneurship for Undergraduates [2016X0619, 2016X0624]
Large quantities of microplastics with small particle sizes were found in the South China Sea (SCS). The abundances of microplastics in seawater were 0.045 +/- 0.093 and 2569 +/- 1770 particles/m(3) according to the bongo net and pumping sampling methods, respectively. Smaller-size fractions (size < 0.3 mm) contributed 92% of the number of microplastics to the total load. Continental slope is the largest reservoir of microplastics with an inventory of 295 tons. 21 polymer types were found in the samples using the micro Fourier Transform Infrared Spectroscopy (FTIR), among which alkyds (22.5%) and polycaprolactone (PCL) (20.9%) accounted for almost half of the total polymer content. Lighter plastics would not only concentrate upon the coastal area, being more likely to drift further into open seas with ocean currents. The distribution characteristics showed that it was mainly controlled by terrestrial input of the Pearl River. This study, as the first report from SCS on microplastics in water for its distribution and influence factors, provided impetus for further research on the transportation fate and the behavior of this emerging pollutant from coastal zone to the open oceans. (C) 2018 Elsevier B.V. All rights reserved.
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