Researchers at RMIT University have discovered that eucalyptus bark, a forestry waste product typically discarded during logging, can be transformed into a highly porous carbon material effective at removing pollutants from water and air while capturing carbon dioxide.

The team converted the bark into activated carbon through a relatively simple processing method. The resulting material traps contaminants as water or air passes through it, functioning as both a water filter and air purifier. The research appears in the journal Biomass and Bioenergy.

Eucalyptus bark represents an abundant waste stream in timber production. Rather than becoming landfill, this byproduct now offers practical environmental applications. The porous carbon structure created during processing provides the material with high surface area and adsorption capacity, allowing it to bind pollutants effectively.

The work addresses two environmental challenges simultaneously. Water contamination from industrial processes and agricultural runoff affects billions globally. Air quality degradation from particulates and volatile organic compounds contributes to respiratory disease and climate impacts. Current filtration technologies often require energy-intensive manufacturing or expensive replacement cycles. Repurposing forestry waste into activated carbon reduces processing costs and environmental burden compared to virgin carbon sources.

The simplicity of the conversion process enhances commercial viability. Complex manufacturing typically limits adoption of new environmental technologies in resource-constrained regions. RMIT's method suggests eucalyptus bark could be processed at or near logging sites, reducing transportation emissions and creating local economic value.

Limitations remain. The research does not specify which specific pollutants the material removes most effectively or compare its performance against existing activated carbon products. Scaling from laboratory validation to industrial production requires testing on contaminated water sources and air streams in real-world conditions. The longevity of the material before requiring replacement and optimal regeneration methods also require further investigation.

The findings nonetheless establish eucalyptus bark as a viable