Thursday, 02 April 2020
Researchers at the University of Nottingham have highlighted highly variable levels of microplastic pollution in UK rivers. The work makes recommendations for the future study of freshwater microplastic pollution so that research can better inform consumers and legislators.
A 12 month study by scientists from the University of Nottingham has found low and highly variable levels of microplastic pollution across three rivers in the Trent catchment, in one of the most comprehensive published records of freshwater microplastic pollution.
Researchers from the University’s School of Geography and Department of Chemical and Environmental Engineering collected samples from 10 sites across the River Trent, the River Leen and the River Soar. Their sample locations enabled the assessment of microplastic particles at the sources of these rivers, as well as sites upstream and downstream of urban centres including Nottingham, Stoke-on-Trent, and Leicester.
Microplastic particles were identified at every site sampled during the study, however, the concentrations recorded were consistently low, particularly near the sources of the sampled rivers. Microplastic concentrations did not once exceed 0.4 particles per litre, and many samples contained no microplastic particles at all.
In addition to being consistently low, by returning to the same sites at regular (4 week) intervals the team found microplastic concentrations to be highly variable. Daily freshwater microplastic discharges varied from as few as 0 particles per day to over 600 million particles per day at one sample site.
The results of the project are published in the journal Environmental Pollution - Freshwater microplastic concentrations vary through both space and time.
This work has implications for the future study of freshwater microplastic pollution. Where previous riverine microplastic studies have reported concentrations from a limited number of samples, the University of Nottingham research highlights the need for more thorough assessments of microplastic prevalence in future work to better inform consumers, industry, regulators and government.
Microplastic particles continue to be identified in freshwater environments all over the world, however, without accounting for the variation identified in our work it is not possible for microplastic research to consider the extent to which its findings are representative of the environments it samples.
He added: "Further research is needed to understand how additional sources of uncertainty, such as variation throughout the profile of a river, can influence our understanding of the role rivers play as sources, pathways, and receptors of microplastic pollution.”
“We do not wish to underplay the potential impacts of microplastic pollution, but we need to make sure that the findings of microplastic research are not misrepresented. Otherwise, legislators, industry, and the general public are not equipped with the information needed to make informed decisions to address the microplastic problem.”
Story credits
More information is available from Tom Stanton in the School of Geography, University of Nottingham by email at thomas.stanton@nottingham.ac.uk; or Emma Thorne, Head of News in the Communications Office at The University of Nottingham, on +44 07504 957308, emma.thorne@nottingham.ac.uk
Nasreen Suleman - Media Relations Manager, Faculty of Social Sciences
Email: nasreen.suleman@nottingham.ac.uk
Phone: 0115 951 5793
Location: C4, Pope Building, University Park, Nottingham,NG7 2RD
Notes to editors:
About the University of Nottingham
Ranked 32 in Europe and 16th in the UK by the QS World University Rankings: Europe 2024, the University of Nottingham is a founding member of the Russell Group of research-intensive universities. Studying at the University of Nottingham is a life-changing experience, and we pride ourselves on unlocking the potential of our students. We have a pioneering spirit, expressed in the vision of our founder Sir Jesse Boot, which has seen us lead the way in establishing campuses in China and Malaysia - part of a globally connected network of education, research and industrial engagement.
Nottingham was crowned Sports University of the Year by The Times and Sunday Times Good University Guide 2024 – the third time it has been given the honour since 2018 – and by the Daily Mail University Guide 2024.
The university is among the best universities in the UK for the strength of our research, positioned seventh for research power in the UK according to REF 2021. The birthplace of discoveries such as MRI and ibuprofen, our innovations transform lives and tackle global problems such as sustainable food supplies, ending modern slavery, developing greener transport, and reducing reliance on fossil fuels.
The university is a major employer and industry partner - locally and globally - and our graduates are the second most targeted by the UK's top employers, according to The Graduate Market in 2022 report by High Fliers Research.
We lead the Universities for Nottingham initiative, in partnership with Nottingham Trent University, a pioneering collaboration between the city’s two world-class institutions to improve levels of prosperity, opportunity, sustainability, health and wellbeing for residents in the city and region we are proud to call home.
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