Microplastics in our soil: First consistent risk assessment

Microplastics in soil present a complex issue, with risks that are challenging to determine. Researchers from the Spanish institute IMDEA Water and Wageningen University & Research have conducted an ecological risk assessment for the first time, indicating indeed there are risks to anticipate.

Dr. Paula Redondo-Hasselerharm from IMDEA Water emphasizes, "Our concerns regarding plastic started in oceans, followed by rivers and lakes. Now, we're also focusing on soil." Microplastic waste is globally found in soils, with expectations of emissions increasing in the coming years, amplifying the risk for soil organisms.

Different Particles, Different Sources

Researcher Prof. Dr. Bart Koelmans explains, "Studies have often compared apples with oranges. The diversity of microplastic particles in soils complicates comparisons. We address this by employing a method that adjusts for these differences." Dr. Redondo-Hasselerharm adds, "We observed variations in plastic particles from different sources of microplastic, such as background pollution or contamination from compost or sludge, resulting in four distinct risk assessments."

Microplastic Risk Assessment

While most soils globally currently show no risk, exposure surpasses the effect threshold in some locations. With the increasing quantity of microplastics, this number could rise. The public and policymakers seek evaluations of plastic waste risks. Quantitative methods like these offer valuable insights, aiding public awareness.

Wageningen University & Research is developing tools for assessing the risk of nano- and microplastics across various environments and for human health.

Wur.nl