The aim of this paper has been to find a biomass pretreatment protocol for preparing activated carbons without using any of the commercially-applied chemical additives. Instead, we employed a hydrothermal-pressure preconditioning protocol (160 ℃, 300–390 psi) to induce rapid steam expansion within pine sawdust, followed by pyrolysis/activation. The pinewood sawdust was preconditioned via three alternative synthesis protocols: (a) High-Pressure Hydrothermal Eruption (HPE), (b) High-Pressure Hydrothermal (HP), and (c) non-pre-pressure Hydrothermal (HY) treatment. Activated carbons were characterized by BET, SEM, FTIR and XPS; and the results indicate that HP achieved the highest specific surface area (990 m² g⁻¹) and micropore volume (0.344 cm³ g⁻¹). Adsorption tests with perfluorooctanoic acid (PFOA) and methylene blue (MB) show that the adsorption capacities of the prepared activated carbons were significantly better than a commercial activated carbon (CAC). The HP exhibited the highest adsorption capacity for PFOA (232 mg g⁻¹) and MB (350 mg g⁻¹). The PFOA adsorption rates were empirically described by pseudo-second-order and intra-particle diffusion models; and the equilibrium sorption of PFOA fit well to Langmuir isotherm model.

本文的目的是找到一种生物质预处理方案，用于在不使用任何商业应用的化学添加剂的情况下制备活性炭。相反，我们采用了热液压力预处理方案（160 ℃，300-390 psi）来诱导松木屑内的快速蒸汽膨胀，然后进行热解/活化。松木锯末通过三种替代合成方案进行预处理：(a) 高压水热喷发 (HPE)，(b) 高压水热 (HP)，和 (c) 非预压水热 (HY) 处理。活性炭通过BET、SEM、FTIR和XPS表征；结果表明，HP 实现了最高的比表面积 (990 m ² g ^-1 ) 和微孔体积 (0.344 cm ³ g ^-1）。全氟辛酸 (PFOA) 和亚甲蓝 (MB) 的吸附试验表明，制备的活性炭的吸附能力明显优于商业活性炭 (CAC)。HP 对 PFOA (232 mg g ^-1 ) 和 MB (350 mg g ^-1 )表现出最高的吸附能力。PFOA 吸附率通过伪二级和颗粒内扩散模型经验性地描述；PFOA 的平衡吸附符合 Langmuir 等温线模型。