Cited by 1,149Microplastics and Plastic PollutionPharmaceutical and Antibiotic Environmental ImpactsEnvironmental Toxicology and Ecotoxicology

Microplastics en route: Field measurements in the Dutch river delta and Amsterdam canals, wastewater treatment plants, North Sea sediments and biota

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Leslie, H.A., Brandsma, S.H., van Velzen, M.J.M., Vethaak, A.D.·2017·Environment International

Abstract

Environmental contamination by plastic particles, also known as 'microplastics', brings synthetic materials that are non-degradable and biologically incompatible into contact with ecosystems. In this paper we present concentration data for this emerging contaminant in wastewater treatment plants (WWTPs) and freshwater and marine systems, reflecting the routes via which these particles can travel and the ecosystems they potentially impact along their path. Raw sewage influents, effluents and sewage sludge from seven municipal WWTPs in the Netherlands contained mean particle concentrations of 68-910L-1, 51-81L-1 and 510-760kg-1 wet weight (ww), respectively (particle sizes between 10 and 5000μm). Even after treatment, wastewater constitutes a source of microplastic pollution of surface waters, and via biosolids applications in farming and forestry, plastic retained in sewage sludge can be transferred to terrestrial environments. The WWTPs investigated here had a mean microplastics retention efficiency of 72% (s.d. 61%) in the sewage sludge. In the receiving waters of treated and untreated wastewaters, we detected high microplastic levels in riverine suspended particulate matter (1400-4900kg-1 dry weight (dw)) from the Rhine and Meuse rivers. Amsterdam canal water sampled at different urban locations contained microplastic concentrations (48-187L-1), similar to those observed in wastewater that is emitted from sewage treatment facilities in the area. At least partial settling of the particles occurs in freshwater as well, as indicated by microplastics in urban canal sediments (<68 to 10,500particleskg-1 dw). Microplastics in suspension in the water column have the potential to be discharged into the sea with other riverine suspended particulates. We report microplastic concentrations from 100 up to 3600particleskg-1 dry sediment collected at 15 locations along the Dutch North Sea coast. The high microplastic enrichment in marine sediments compared to most literature data for seawater at the surface supports the hypothesis of a seabed sink for these materials. Marine species are heavily exposed to plastic particles. Body residues between 10 and 100particlesg-1 dw were measured in benthic macroinvertebrate species inhabiting the Dutch North Sea coast: filter-feeding mussels and oysters (species for human consumption) as well as other consumers in the marine food chain.

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Crossref · 10.1016/j.envint.2017.01.018

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Authors
Leslie, H. A., Brandsma, S. H., van Velzen, M. J. M., & Vethaak, A. D.
Affiliations
  • Vrije Universiteit Amsterdam (NL)
  • Deltares (NL)
Corresponding author
Leslie, H.A.
Venue
Environment International
Publisher
Elsevier BV
Published
2017-04
Volume
101
Pages
133-142
ISSN
0160-4120 (ISSN-L)
OpenAlex
W2581845998
Cited by
1,149
References
46
Citations by year
2026: 76 · 2025: 112 · 2024: 154 · 2023: 170 · 2022: 187 · 2021: 153 · 2020: 159 · 2019: 75 · 2018: 51 · 2017: 11
FWCI
36.50
Type
journal article
Language
en
Open access
Locations
  • Environment International (publishedVersion)
  • PubMed (publishedVersion)
  • VU Research Portal (publishedVersion, other-oa)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion)
  • Data Archiving and Networked Services (DANS) (submittedVersion)
Funders
  • Dutch Ministry of Infrastructure and the Environment
  • Dutch water company Waternet
Topics
  • Physical Sciences › Environmental Science › Pollution › Microplastics and Plastic Pollution
  • Physical Sciences › Environmental Science › Pollution › Pharmaceutical and Antibiotic Environmental Impacts
  • Physical Sciences › Environmental Science › Health, Toxicology and Mutagenesis › Environmental Toxicology and Ecotoxicology
Keywords
microplastics, wastewater treatment plants, sewage sludge, suspended particulate matter, river sediments, canal sediments, North Sea sediments, marine sediment, benthic macroinvertebrates, mussels, oysters, filter-feeding organisms, plastic ingestion, biosolids application, plastic pollution
MeSH terms
Environmental Monitoring, Fresh Water, Humans, Netherlands, North Sea, Plastics, Seawater, Water Pollutants, Chemical, Rivers, Biota, Wastewater

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