Wang Jingxin, Wang Xiaohong, Lin Xiaoping, Yu Ziyi, Vione Davide, Huang Haomin, Zhang Xiaohong, Zhang Yanhong, He Jiaqi, Xia Yun, Fang Hansun
Guangdong Provincial Engineering Research Center of Public Health Detection and Assessment, School of Public Health, Guangdong Pharmaceutical University, Guangzhou 510310, China.
School of Art and Media, Guangzhou Vocational University of Science and Technology, Guangzhou 510550, China.
Molecules. 2024 Dec 16;29(24):5931. doi: 10.3390/molecules29245931.
Porous activated carbons (AC-AN and AC-AO) for toluene adsorption were prepared starting from brewer's grain biomass pretreated with microorganisms ( van Tieghem for AC-AN and RIB40 for AC-AO). The structures and chemical properties of the three activated carbon materials (AC-AN, AC-AO, and AC that was not pretreated with microorganisms) were characterized by N adsorption-desorption isotherms, scanning electron microscopy (SEM), transmission electron microscopy (TEM), Fourier-transform infrared spectroscopy (FTIR), Raman spectroscopy, X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS). The adsorption behavior of the three activated carbons for toluene was studied and correlated with the physical and chemical properties of these materials. The results suggested that the activated carbons prepared by microbial pretreatment had a rougher morphology, higher specific surface area, richer pore structure, fewer oxygen-containing functional groups on the surface, and better adsorption performance for toluene (increased by 31.5% and 18.3% with AC-AN and AC-AO, respectively) compared with the untreated activated carbon (AC). The Thomas model was used to fit the toluene adsorption data, indicating that the rich pore structure accelerated the kinetic process of toluene adsorption. Therefore, appropriate microbial pretreatment of the feedstock that is used to prepare activated carbon can effectively improve its adsorption capacity towards toluene.
用于甲苯吸附的多孔活性炭（AC - AN和AC - AO）是从经微生物预处理的啤酒糟生物质制备而来（AC - AN用范蒂格姆菌预处理，AC - AO用RIB40菌预处理）。通过氮气吸附 - 脱附等温线、扫描电子显微镜（SEM）、透射电子显微镜（TEM）、傅里叶变换红外光谱（FTIR）、拉曼光谱、X射线衍射（XRD）和X射线光电子能谱（XPS）对三种活性炭材料（AC - AN、AC - AO和未用微生物预处理的AC）的结构和化学性质进行了表征。研究了这三种活性炭对甲苯的吸附行为，并将其与这些材料的物理和化学性质相关联。结果表明，与未处理的活性炭（AC）相比，经微生物预处理制备的活性炭具有更粗糙的形态、更高的比表面积、更丰富的孔结构、表面含氧官能团更少，以及对甲苯更好的吸附性能（AC - AN和AC - AO对甲苯的吸附性能分别提高了31.5%和18.3%）。采用托马斯模型拟合甲苯吸附数据，表明丰富的孔结构加速了甲苯吸附的动力学过程。因此，对用于制备活性炭的原料进行适当的微生物预处理可以有效提高其对甲苯的吸附能力。
