Experiment investigation on the performance of activated bamboo biochar for the adsorption of CO₂ and PM _2.5

This study aimed to use activated biochar made from bamboo (B) to adsorb CO₂ and PM_2.5. Raw bamboo biomass had a yield of 34.25% biochar at 500 °C with a residence time of 60–120 min. Activated biochar was produced by treating the biochar with the chemical KOH (Potassium Hydroxide), resulting in a BET surface area of 338 m²/g. SEM analysis showed that biochar and activated biochar had a highly porous structure, making them effective at extracting organic and inorganic contaminants from the air. The sorption capacity of bamboo-activated biochar for air was assessed, and the results showed that the bamboo-activated biochar produced at 700 °C had superior physicochemical composition. When using activated bamboo biochar, the air purifier's performance efficiency for removing CO₂ and PM_2.5 was 91.23 and 89.19%, respectively.