Story perspectives

Revolutionary Bark Method Cleans Wastewater, Erases Pharmaceuticals

1/22/2026

Summary

Story summary

Researchers at the University of Oulu in Finland have developed a cost-effective wastewater treatment method using magnetite-treated pine bark to remove antibiotics and pharmaceutical residues.
In a four-month pilot project, the bark material achieved removal efficiencies of 99.7% for trimethoprim and 93.7% for venlafaxine.
The European Union's updated Urban Wastewater Directive underscores the need for better micropollutant removal, and researchers urge the public to dispose of unused medications properly.

1 of 1

Story summary

Researchers at the University of Oulu in Finland have developed a cost-effective wastewater treatment method using magnetite-treated pine bark to remove antibiotics and pharmaceutical residues.
In a four-month pilot project, the bark material achieved removal efficiencies of 99.7% for trimethoprim and 93.7% for venlafaxine.
The European Union's updated Urban Wastewater Directive underscores the need for better micropollutant removal, and researchers urge the public to dispose of unused medications properly.