Impact of Infiltration-Induced Nano- and microplastics Migration on the Strength and Hydraulic Conductivity of Biochar-Amended Sandy Soils

About the Project

Nano- and microplastics are increasingly recognised as emerging contaminants within terrestrial environments. They originate from various sources such as road runoff, agricultural activities, and landfill liners, gradually accumulating in the upper soil layers. In permeable sandy soils, these plastic particles can migrate downward through infiltration processes, threatening groundwater quality and altering the physical behaviour of the soil matrix. Despite growing awareness of their environmental risk, limited research has focused on how Nano- and microplastics influence the mechanical and hydraulic properties of soils or how sustainable materials might mitigate their movement.

Biochar, a porous carbon-rich by-product of biomass pyrolysis, has shown potential in improving soil structure, reducing permeability, and adsorbing contaminants. Its use may not only restrict plastic migration but also enhance soil strength and stability. This project aims to investigate the mechanisms governing Nano- and microplastics migration in sandy soils under infiltration conditions and to explore the role of biochar as an environmentally friendly amendment for immobilizing these particles.

The outcomes of this research will advance understanding of how Microplastics/Nano-plastics behave within soil systems and how natural, carbon-based materials can mitigate their movement. The findings are expected to contribute to sustainable soil management, pollution control, and the design of future ground improvement strategies that align with circular economy and environmental protection goals.

Supervisors:

Dr Akram Karimian

Dr Alireza Ahangar Asr