In a recent study published in Environmental Research, scientists explored the potential of chestnut shell-derived biochar for removing acetaminophen (APAP) from water. The research focused on how varying pyrolysis temperatures affect the biochar’s properties and efficiency in degrading APAP when activated with peracetic acid (PAA).

The study revealed that pyrolysis temperature significantly influences the biochar’s physical and chemical characteristics. Biochar produced at higher temperatures, particularly at 900°C (CN900), exhibited enhanced properties, such as increased surface area, micro-porosity, and a greater abundance of oxygen-containing functional groups. These characteristics are crucial for efficient adsorption and activation of PAA, which leads to the generation of reactive oxygen species (ROS) that degrade APAP.

CN900 biochar demonstrated a superior adsorption capacity of 55.8 mg g−1, outperforming biochar produced at lower temperatures. The increased surface area and functional groups in CN900 facilitate the decomposition of PAA’s O–O bond, resulting in effective APAP degradation through ROS production.

This study underscores the potential of chestnut shell-derived biochar as a sustainable and cost-effective material for water purification. Utilizing agricultural waste products like chestnut shells not only addresses environmental pollution but also promotes resource efficiency. The findings suggest that biochar, particularly when processed at higher temperatures, can be a viable solution for mitigating APAP contamination in aquatic environments, offering a promising approach for environmental cleanup efforts.

This research contributes to the development of advanced materials for environmental remediation, highlighting the importance of optimizing biochar properties through controlled pyrolysis for effective pollutant removal.