Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 541336
Title Marine microplastic: Preparation of relevant test materials for laboratory assessment of ecosystem impacts
Author(s) Kühn, Susanne; Oyen, Albert Van; Booth, Andy M.; Meijboom, André; Franeker, Jan A. Van
Source Chemosphere 213 (2018). - ISSN 0045-6535 - p. 103 - 113.
Department(s) IMARES Onderzoeksformatie
Aquatic Ecology and Water Quality Management
Publication type Refereed Article in a scientific journal
Publication year 2018
Keyword(s) Reference material - Microplastic - Characterisation - Cryo-milling - Impact assessment - Marine debris
Abstract Studies investigating the effects of plastic litter on marine biota have almost exclusively utilised pristine plastic materials that are homogeneous in polymer type, size, shape and chemical composition. This is particularly the case for microplastics (<5 mm), where collecting sufficient quantities from the marineenvironment for use in laboratory impacts studies is simply not feasible. Weathered plastics collected from the marine environment show considerable physical and chemical differences to pristine and postproduction consumer plastics. For this study, macroplastic litter was collected on a Dutch beach andcryo-milled to create a microplastic mixture for environmental impact assessments. The sample composition followed proportions of marine plastic litter types observed in an earlier large beach cleanup. Polymer composition of the sample was assessed by infrared spectroscopy (ATR-FTIR) and differentialscanning calorimetry analysis (DSC). The particle size distribution of the cryo-milled microplastics showed that particles 0.5e2.0mm represented 68% of mass, but smaller sizes (<2 mm) strongly dominated numerically. Inductively coupled plasma spectroscopy (ICP-MS and ICP-OES) analysis of the microplastic mixture revealed a broad range of metals and other elements (e.g. Al, Cd, Cr, Fe, Mg, Pb, S and Zn), representing common inorganic additives used as colorants, fillers and stabilisers. GC-MS analysis identified a broad range of organic plasticisers, stabilisers, antioxidants and flame retardants. Comparison of different analytical approaches showed that creation of a homogeneous microplastic mixture is possible, representing a first step in closing the gap between laboratory studies with pristine materials and realistic scenarios with weathered microplastic.
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