A significant new research project has commenced to investigate the extent of microplastic pollution within the River Thames. Led by the University of East London (UEL), the study will gather crucial data to understand how pollution levels are evolving and the potential influence of climate pressures on the river system. This initiative aims to provide robust scientific evidence to inform environmental policy and ultimately enhance water quality.
Dr. Ria Devereux, from UEL's sustainability research institute, is spearheading the project. Her team will collect surface water samples from seven publicly accessible locations along the Thames, stretching from Teddington in south-west London to Southend-on-Sea in Essex. These locations include key points such as Westminster, St Katharine Docks, Limehouse, North Woolwich, and Tilbury. Each sample, consisting of three litres of surface water, will undergo meticulous laboratory analysis to filter and capture tiny plastic particles.
Once filtered, the samples will be examined under a microscope to identify suspected microplastics, recording their size, colour, and shape. A crucial step involves using Fourier-transform infrared spectroscopy (FTIR) on representative particles. This advanced technique allows researchers to definitively identify the material, confirming if particles are indeed plastic and, if so, their specific type. This detailed analysis will help build a comprehensive picture of microplastic contamination along the Thames and track changes over time.
The study extends beyond current pollution levels, also exploring the impact of storm activity and changing environmental conditions on microplastic concentrations across the river. Dr. Devereux emphasised the Thames' global recognition as an urban river, highlighting the ongoing effort to understand the scale and complexity of its microplastic burden. The project is designed to equip policymakers with the necessary understanding to identify areas where interventions are most needed.
Beyond the scientific analysis, the UEL team plans to produce policy briefings and host a dedicated stakeholder workshop at their Royal Docks Centre for Sustainability. This workshop will bring together regulators, environmental organisations, and policymakers, fostering collaboration and ensuring the research findings translate into practical environmental decision-making. The project's findings are expected to indicate whether pollution has increased or decreased and to highlight specific areas where water quality improvements are paramount.