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Microplastic Quantification in Nissan and Lagan River Systems in Shore and Bottom Sediments
Halmstad University, School of Business, Innovation and Sustainability.
Halmstad University, School of Business, Innovation and Sustainability. (Wetland Research Center)ORCID iD: 0000-0003-1556-3861
Halmstad University, School of Business, Innovation and Sustainability.ORCID iD: 0000-0002-0695-4660
Halmstad University, School of Business, Innovation and Sustainability. (Wetland Reseach Center)
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2022 (English)In: Abstract Book: The Next Years: Sensing and Safeguarding Inland Waters, 2022, p. 11-11Conference paper, Oral presentation with published abstract (Other academic)
Abstract [en]

Jakobs sjö, an electricity dam of the Nissan River system (Southwest Sweden) is contaminated with large microplastics sedimented out at its shores. In 2021 a field survey of microplastics was carried out in the Nissan River with the Lagan River asreference. We sampled three locations in each river (upstream, lake/dam and downstream). Four replicate bottom and shore sediment samples were taken at each location. Dried samples were fractionated into three size categories (> 2 mm; 2 – 0.9mm; 0.9 – 0.55 mm) and microplastics per area and weight were estimated. We found a higher concentration of large shore microplastics in Jacobs sjö and downstream from it than upstream in the Nissan River. We found no large shore microplastics in the Lagan River system. Smaller size fractions of microplastics were omnipresent in shore and bottom sediments of both rivers. However, the smallest size category tended to be proportionately more dominant at upstream than at downstream locations. This could be explained by biofilm-microplastic floc formation and sedimentation as particles travel downstream. Concentrations of toxicants such as heavy metals can increase thousandfold on the surface of microplastics and since the five heavy metals most likely to sorb to microplastics in a freshwater environment (Cd, Cu, Ni, Pb and Zn) were all present in Jacobs sjö, we conclude that the high concentrations of microplastics in Jacobs sjö may pose a threat to aquatic life.

Place, publisher, year, edition, pages
2022. p. 11-11
Keywords [en]
Micro plastic, Water reservoir, shore sediment
National Category
Environmental Sciences
Identifiers
URN: urn:nbn:se:hh:diva-48051OAI: oai:DiVA.org:hh-48051DiVA, id: diva2:1695436
Conference
36th Congress of the International Society of Limnology (SIL 100), Berlin, Germany, 7-10 August, 2022
Available from: 2022-09-13 Created: 2022-09-13 Last updated: 2023-02-21Bibliographically approved

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Liess, AntoniaGreen, David

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