期刊
MARINE POLLUTION BULLETIN
卷 178, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.marpolbul.2022.113647
关键词
Microplastic; Sediment; Carbonyl index; Vinyl index; Crystallinity
资金
- Fundacion Seneca [20268/FPI/17]
- Cartagena Port Authority [5813/19IQA]
This study investigated the microplastic burden in marine and coastal sediments from the harbor of Cartagena (Spain) and its adjoining beach. Fibers were found to be the predominant type of microplastics in both marine and coastal sediments. The highest concentrations were found in the deepest marine sediments and in the furthest zone from the seashore for coastal sediments.
Marine and coastal sediments from the harbor of Cartagena (Spain) and its adjoining beach were investigated regarding their microplastic burden. Fibers accounted for 47.62% and 61.66% in marine and coastal sediments, respectively, followed by films (31.43% and 18.76%) and fragments (20.95% and 18.65%). Polyvinyl (36.07%), polypropylene (21.31%), and polyethylene (18.03%) were isolated for marine sediments, and low-density polyethylene (40.71%), polypropylene (20.16%), and acrylate (11.37%) for coastal sediments. Highest concentrations were found in the deepest marine sediments (24.0 m) and in the furthest zone from the seashore for coastal sediments (18 m). Carbonyl index increased in the intermediate area (12.5 m) for marine sediments (0.51), whilst vinyl index was maximum for the deepest samples (1.94), reporting Norrish type I and II reactions, respectively. Coastal sediments collected close to the high tide line displayed the highest average values for both indices, 1.57 and 1.29, respectively, indicating a higher exposition to weathering variables.
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