Sorption of fluorescent polystyrene microplastic particles to edible seaweed Fucus vesiculosus

Increased global demands for food have raised interest for seaweed as a healthy and sustainable food source. At the same time, the large amounts of microplastic in the oceans have raised concern in relation to pollution of seafood including sea vegetables. The aim of this study was to examine sorpti...

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Bibliographic Details
Published in:Journal of applied phycology 2018-10, Vol.30 (5), p.2923-2927
Main Authors: Sundbæk, Kasper Bjerrum, Koch, Ida Due Würtzner, Villaro, Clara Greve, Rasmussen, Niclas Spangegaard, Holdt, Susan Løvstad, Hartmann, Nanna B.
Format: Article
Language:English
Subjects:
6th Congress of the International Society for Applied Phycology
Algae
Biomedical and Life Sciences
Chemical analysis
Ecology
Flasks
Fluorescence
Food sources
Foods
Freshwater & Marine Ecology
Fucus vesiculosus
Life Sciences
Methods
Microplastics
Microscopy
Oceans
Plant Physiology
Plant Sciences
Plastic debris
Pollution
Polystyrene
Polystyrene resins
Procedures
Seafood
Seafoods
Seawater
Seaweeds
Sorption
Tips
Water analysis
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Summary:Increased global demands for food have raised interest for seaweed as a healthy and sustainable food source. At the same time, the large amounts of microplastic in the oceans have raised concern in relation to pollution of seafood including sea vegetables. The aim of this study was to examine sorption of fluorescent polystyrene (PS) microplastic particles to edible macroalga (seaweed) Fucus vesiculosus , and to investigate to what extent adsorbed PS particles could be washed off, using an industrial relevant method. PS microplastic particles (diameter of 20 μm) were used in a concentration of 2.65 mg L −1 (corresponding to 597 particles per mL) in filtrated seawater (50 mL) to treat F . vesiculosus distal tips in blue cap flasks (100 mL) placed in a rotary box for 2 h. Results showed sorption of PS microplastic particles to F . vesiculosus analysed by microscopy and a significant reduction of 94.5% by washing. These results were based on high microplastic concentrations, not comparable to natural conditions/concentrations. Nonetheless, this study provides methodological and mechanistic insights into procedures for investigating the sorption of microplastics to seaweed, for which there is currently no established standardised method.
ISSN:0921-8971
1573-5176
DOI:10.1007/s10811-018-1472-8