Using waste biomass to prepare various products by environmentally benign processes is a good way to practice green and sustainable development. In this paper, high porosity and surface area biomass activated carbon was obtained by pyrolysis of pine sawdust without using any chemicals after steam bursting pretreatment. Under hydrothermal conditions at 160 ℃, the differences of steam bursting at 300, 500, or 700 psi pressures on the structure and surface chemical groups of the final activated carbons product were compared. The characterization showed that the specific surface areas and micropore volumes decreased with the increase of pressure, while the relative content of oxygen-containing functional groups changed slightly. The sample obtained following 300 psi pretreatment (HPB300) offered the highest BET surface area and pore volume, 962 m²/g and 0.526 cm³/g respectively, and which also achieved the highest adsorption amounts for both methylene blue (MB) and perfluorooctanoic acid (PFOA).

利用废弃生物质通过环保工艺制备各种产品，是践行绿色可持续发展的好方法。在本文中，通过蒸汽爆破预处理后不使用任何化学品的松木屑热解获得高孔隙率和表面积的生物质活性炭。在160 ℃水热条件下，比较了300、500或700 psi压力下蒸汽爆破对最终活性炭产品的结构和表面化学基团的差异。表征表明，随着压力的增加，比表面积和微孔体积减小，而含氧官能团的相对含量略有变化。在 300 psi 预处理 (HPB300) 后获得的样品提供了最高的 BET 表面积和孔体积，962 m² /g 和 0.526 cm ³ /g，并且对亚甲蓝 (MB) 和全氟辛酸 (PFOA) 的吸附量也最高。