| Title of dataset | Microplastic particles in sediments from Danish waters 2018-2021 |
| Narrative summary of dataset | In relation to Danish MSFD monitoring the data maps microplastics content in sediments in Danish waters. Data covers 13 sediment samples from the Belt Sea and its fjords, Kattegat and Limfjord. The samples were taken in 2018-2021 and analyzed in 2020-2021. A study of variation of microplastics over short distances, consisting of 13 sediment samples taken in a grid in Odense Fjord in 2021. The survey showed that microplastic could be found in all sediment samples in concentrations ranging from 22 to 7402 µg kg-1 (microgram microplastic per kg sediment dry matter). As number of microplastic particles, this corresponded to between 508 and 23340 N kg-1 (number of microplastics per kg of sediment dry matter) Odense Fjord showed that the microplastic content at this locality varied greatly. The average mass concentration was 4683 µg kg-1 with a range from 250 to 24848 µg kg-1 . Measured as a number, the concentration averaged 18671 N kg-1 with a range from 7266 to 34141 N kg-1 . |
| Summary of processing methodology | Samling: Top 2 cm sediments sampled with HAPS. Steps in sample reparation: sediments were preoxidised in 30% H2O2 -> wet sewed with milliQ water -> dryfreezed -> first density sepatation with sodiumpolytungstate times -> Enzymatic treatment with proteases/cellulase -> fentonoxidation, second density separation -> ATR-FTIR analysis, FTIR analysis
All found particles were analysed. Both Field and lab blanks were taken.
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| Supporting documentation | Havstrategi Analyse af mikroplast partikler i sedimenter.pdf |
| Start date | 2018-10-29 |
| End date | 2021-06-16 |