Coastal gradients of small microplastics and associated pollutants influenced by estuarine sources

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URI: http://hdl.handle.net/10498/26471
DOI: 10.1016/j.marpolbul.2021.113292
ISSN: 0025-326X
ISSN: 1879-3363
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2022-01Department
Biología; Ciencia de los Materiales e Ingeniería Metalúrgica y Química InorgánicaSource
Marine Pollution Bulletin Volume 174, January 2022, 113292Abstract
Small microplastics (SMPs) in the gulf of Cadiz was sampled at 5 m depth by pumping it through the ship's pipe system and filtered through a 45 mu m mesh size net. Our study reveals that higher densities have been found (130 mg.m(-3)) compared to other regions worldwide and these densities decreased from the coastline to the outer stations, showing a general coastal gradient influenced by estuarine outflows. SMPs with a size range between 45 and 193 mu m were predominant and most of them composed by polyethylene and polypropylene. The metals associated with the MPs were mainly Na (21.1%), K (11.3%), Fe (8.5%), Ca (2.1%), Cr (1.8%), Zr (13.3%) and Hf (0.7%). The high proportion of Zr compared to Fe, which is different from what can be found in the environment,
Subjects
Marine litter; Microplastics; Estuarine source; Oceanographic current; Metallic additives; Food webCollections
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