School of Environment and Energy, South China University of Technology, Guangzhou, 510006, China.
National Engineering Laboratory for VOCs Pollution Control Technology and Equipment, Guangzhou, 510006, China.
Environ Sci Pollut Res Int. 2021 Sep;28(34):46186-46195. doi: 10.1007/s11356-021-12796-y. Epub 2021 Feb 11.
Volatile organic compounds (VOCs), which are usually organic compounds with boiling point in the range of 50 to 260°C, pose a serious threat to human health and ecological environment. In order to find an adsorbent with excellent adsorption effect on VOCs, activated carbon was prepared from corn bran partially degraded by Trichoderma viride, and the adsorption performance of the optimized porous carbon materials on toluene was studied. Physical and chemical properties (such as specific surface area, pore size distribution, and surface functional groups) of the activated carbon were characterized by scanning electron microscope (SEM), N adsorption/desorption experiences, Fourier-transform infrared (FTIR), and Raman and X-ray diffraction (XRD). The results showed that the specific surface area of corn bran reached 1896 m/g and the total pore volume was 1.04 cm/g after 15 days of microbial pretreatment. Dynamic simulation of adsorption experiment found that the saturated adsorption capacity of the pretreated carbon material was 237 mg/g at 100 ppm toluene concentration, which was 1.58 times of that of corn bran without microbial pretreatment. Generally, the improvement of adsorption performance may be mainly attributed to the increase of specific surface area, pore volume and the decrease of surface acidic groups.
挥发性有机化合物（VOCs）通常是指沸点在 50 至 260°C 范围内的有机化合物，它们对人类健康和生态环境构成严重威胁。为了寻找对 VOCs 具有优异吸附效果的吸附剂，本研究采用绿色木霉部分降解后的玉米皮制备活性炭，并对优化后的多孔碳材料对甲苯的吸附性能进行了研究。采用扫描电子显微镜（SEM）、N2 吸附/脱附实验、傅里叶变换红外光谱（FTIR）、拉曼光谱和 X 射线衍射（XRD）对活性炭的物理化学性质（如比表面积、孔径分布和表面官能团）进行了表征。结果表明，经过 15 天的微生物预处理，玉米皮的比表面积达到 1896 m2/g，总孔体积为 1.04 cm3/g。吸附实验的动态模拟发现，在 100 ppm 甲苯浓度下，预处理碳材料的饱和吸附容量为 237 mg/g，是未经微生物预处理的玉米皮的 1.58 倍。一般来说，吸附性能的提高可能主要归因于比表面积、孔体积的增加和表面酸性基团的减少。
