PhD position - Mobility of microplastics in soils and their potential uptake by agriculturally relevant plants

The Centre for Cleantech and Biomass Resource Efficiency invites applications for a PhD student to undertake a critical investigation of microplastic pollution in agricultural systems. This research will investigate the dynamics of microplastic migration within soils and their subsequent uptake by plants, with the aim of addressing the escalating concern over agricultural pollution from recycled fertilisers. This fully funded position offers a unique opportunity to contribute to ground-breaking research in environmental sustainability and the protection of agricultural integrity.

Research Focus

This research will focus on the mobility of microplastics in soils and their potential uptake by agriculturally important plants. The extensive use of plastics and inadequate management of biogenic waste have resulted in significant microplastic contamination, particularly in agricultural environments. This project aims to address critical gaps in our understanding of the long-term persistence of weathered microplastics under natural field conditions and the interactions between these particles and soil-plant systems.

Key aspects of the research include:

• Conducting controlled flow experiments to replicate the deposition of microplastics via recycled fertiliser, with a focus on investigating their migration through soil columns.
• Carry out detailed analyses of the spatial distribution and mean displacement of microplastic particles within soil matrices to assess their mobility under different environmental conditions.
• Assess the uptake and internalisation of microplastics by plants through standardised greenhouse experiments, focusing on their physiological effects on plant growth and transpiration rates.
• Assess the environmental and agricultural risks associated with the use of microplastic-contaminated fertilisers, focusing on potential long-term impacts on soil health and crop productivity.

Job Description

This interdisciplinary position requires expertise in areas such as soil science, environmental chemistry, agronomy and plant physiology. The research will involve both laboratory and greenhouse experiments, with a strong focus on understanding the practical implications of microplastic contamination in real-world agricultural settings. The successful candidate will have the opportunity to work with experts in environmental science, soil mechanics and sustainable agriculture.

Candidate requirements

We are looking for a candidate with:

• A MSc degree in Environmental Science, Agronomy, Soil Science, Chemistry, or a closely related field.
• Strong interest and motivation for research in environmental sustainability, particularly in the context of agriculture.
• Excellent communication skills and proficiency in English.
• Experience in at least one of the following areas: microplastic analysis, soil science, plant physiology, environmental chemistry, or greenhouse experiments.
• Ability to work in a multidisciplinary and collaborative environment.

Position Details

• Starting Date: January 2026 or earlier by agreement.
• Location: Agricultural University of Plovdiv, Bulgaria
• Salary: €1,250/month (€15,000/year), offering high purchasing power by Bulgarian standards.
• Contract Type: Full-time PhD (3–4 years).

Why choose Plovdiv? Plovdiv, Bulgaria's esteemed cultural capital and one of Europe's oldest cities, offers an unparalleled environment for your PhD research, where centuries of history blend seamlessly with contemporary life. The city boasts a vibrant arts scene, well-preserved Roman ruins and a thriving culinary culture, all framed by the picturesque Rhodope Mountains. With affordable living, welcoming residents and a dynamic international community, Plovdiv is more than just a study destination - it is a place to immerse yourself, expand your horizons and find daily inspiration.

Application Instructions

Interested candidates should prepare the following documents:

• Motivation letter (1–2 pages)
• CV (highlighting relevant skills, experience, and publications)
• Transcripts from undergraduate and master’s studies
• Contact information for two academic referees

Please send your application by email to: cmd_au@abv.bg

Contact person: Kostadinka Popova

Tel.:032/654231