A series of bamboo hydrochars were prepared through acid-assisted and two-stage hydrothermal carbonization, characterized and evaluated for the adsorption of Congo red and 2-naphthol in aqueous solutions. The hydrochars have rough surfaces with BET surface areas of 6.77–57.74 m²/g and oxygen-rich functional groups. The additives in feed water revealed critical influences on the physical-chemical and adsorption properties of the hydrochars. The hydrochars can adsorb the two organics effectively, the highest adsorption capacities for Congo red and 2-naphthol are 90.51 and 72.93 mg/g, respectively, at 0.1 mg/mL and 298 K. The adsorption of the two organics on the selected hydrochars is a spontaneous and mainly physical adsorption process. 95% and 92% of the adsorption equilibrium could be accomplished in one hour for Congo red and 2-naphthol on the selected hydrochars, respectively. This study provides references for the production and application of hydrochars as efficient adsorbents in wastewater treatment.

通过酸辅助和两阶段水热碳化制备了一系列竹炭，表征和评价了刚果红和2-萘酚在水溶液中的吸附。碳氢化合物表面粗糙，BET表面积为6.77–57.74 m ²/ g和富氧官能团。进水中的添加剂显示出对碳氢化合物的物理化学和吸附特性的关键影响。水炭可以有效地吸附两种有机物，在0.1 mg / mL和298 K时，刚果红和2-萘酚的最高吸附容量分别为90.51和72.93 mg / g。自发且主要是物理吸附过程。刚果红和2-萘酚在选定的烃类上分别在一小时内可完成95％和92％的吸附平衡。这项研究为水炭作为废水处理中的有效吸附剂的生产和应用提供了参考。