This PhD opportunity, hosted by the University of Exeter as part of the NERC RED-ALERT Centre for Doctoral Training (CDT), focuses on the monitoring challenges and ecological risks associated with bio-based polymers in wastewater and aquatic ecosystems. As plastic pollution is increasingly recognized as a planetary boundary threat, the use of biobased and biodegradable polymers is rising as a substitute for petrochemical-based plastics. However, recent evidence suggests that bio-based fibres, now prevalent in clothing and sanitary products, are often more abundant than petroleum-based microplastic fibres in environmental samples, show limited degradation in natural waters, and can have comparable ecological impacts.

This project aims to address the significant knowledge gaps regarding the environmental fate, behaviour, and ecological effects of bio-based fibres, which are currently underrepresented in environmental monitoring and risk assessment frameworks. The research will develop forensic and high-throughput analytical methods to assess bio-based fibres in environmental samples, apply advanced risk frameworks, and conduct ecotoxicology tests to predict adverse effects. Key research questions include understanding the factors influencing microfibre shedding and degradation, the ecological toxicity of wastewater loaded with bio-based fibres, and the integration of these fibres into risk assessment protocols.

As a PhD student, you will join the award-winning microplastics group at CREWW (Centre for Resilience in Environment, Water and Waste) and the Aquatic Resources Centre at the University of Exeter. The training program includes ecotoxicology (Exeter), chemical fingerprinting (Bath), and wastewater expertise (South West Water), as well as professional development through Exeter’s Doctoral College Researcher Development Programme. The project is highly interdisciplinary, combining biological ecotoxicology, particle characterisation, analytical water chemistry, and circular economy principles, with both laboratory and field-based research components. Communication and outreach activities are also integral to the project.

Applicants should have, or expect to obtain, a First Class or good Upper Second-Class UK Honours degree (or equivalent) in a relevant subject such as biosciences, biology, ecology, ecotoxicology, chemistry, or biochemistry. A master’s degree is advantageous, and significant relevant non-academic experience will be considered. Non-UK applicants must meet the English language requirements. The studentship is tenable for 3.5 years and covers tuition fees, a stipend (£20,780 p/a in 2025/6), and a training support budget. The deadline for applications is January 19, 2026. For more information and to apply, visit the project link.