Using the stems of Dendrocalamus membranaceus Munro as raw materials, pyrolysis char BC-700 and hydrochar HBC-190/700 were prepared by the high-temperature pyrolysis method and the hydrothermal roasting method, respectively. Then, their benzene adsorption performance was evaluated at 55°C. The results showed that the adsorption effect of biochar HBC-190/700 on benzene was three times that of BC-700. Furthermore, the influence of preparation methods on the physical and chemical properties of the adsorbents was investigated using characterization techniques such as BET, XRD, SEM, Raman and FT-IR. SEM results indicated that many carbon microspheres were accumulated on the surface of hydrothermal carbon HBC-190/700, resulting in the formation of crevice pores. BET analysis showed that the hydrothermal carbon HBC-190/700 presented a hierarchical pore distribution of micropores and mesopores, which was conducive to the mass transfer of benzene. In addition, FT-IR analysis revealed that the aromatic functional groups of HBC-190/700 were the key factors for benzene adsorption. 

以黄竹茎为原料, 分别通过高温热解法和水热炭化法制备热解炭BC-700和水热炭HBC-190/700, 并在55°C下进行苯吸附性能测试。结果显示, 水热炭HBC-190/700对苯的吸附效果是热解炭BC-700的3倍。进一步使用比表面积与孔隙度分析(BET)、X射线衍射(XRD)、扫描电子显微镜分析(SEM)、拉曼光谱分析(Raman)和傅里叶变换红外光谱分析(FT-IR)等表征手段, 探讨制备方法对吸附剂物理和化学性质的影响。SEM图像显示水热炭HBC-190/700表面有大量碳微球堆积, 形成缝隙孔。BET结果表明水热炭HBC-190/700呈现微孔和介孔的等级孔分布, 有利于苯的传质转移。此外, FT-IR结果表明, 水热炭HBC-190/700的芳香族官能团是苯吸附的关键因素。