Shao Fulin, Xu Jingtao, Kang Xingsheng, Hu Zhen, Shao Yuanyuan, Lu Chongxiao, Zhao Congcong, Ren Yangang, Zhang Jian
School of Municipal and Environmental Engineering, Shandong Jianzhu University, Jinan 250101, PR China.
School of Municipal and Environmental Engineering, Shandong Jianzhu University, Jinan 250101, PR China.
Sci Total Environ. 2023 Jan 1;854:158675. doi: 10.1016/j.scitotenv.2022.158675. Epub 2022 Sep 9.
Activators affect the physical and chemical properties of carbon products. However, the effects of different activation mechanisms and pyrolysis conditions on the properties of carbon products still need to be explored. In this study, we obtained a new biochar by impregnation of reed powder with an alkali metal salt (CaCl) under a specific pyrolysis procedure and pyrolysis conditions. Impregnation by CaCl can reduce the activation energy of the biomass while capturing and immobilizing oxygenated organic matter during pyrolysis. The new biochar has a high adsorption capacity of organic matters, for example Bisphenol A (BPA). The adsorption results showed that the modified biochar demonstrated a 364.5 % improvement in the adsorption capacity compared to the original biochar. The final performance enhancement was correlated with the confinement conditions of the environment and the procedure of pyrolysis. These procedures ultimately changed the pore distribution, functional group type, aromaticity, and degree of defects of the modified biochar. This study is important to screen synthetic pathways for identifying compounds with excellent adsorption effects.
活化剂会影响碳产品的物理和化学性质。然而，不同活化机制和热解条件对碳产品性能的影响仍有待探索。在本研究中，我们通过在特定热解程序和热解条件下用碱金属盐（CaCl）浸渍芦苇粉获得了一种新型生物炭。CaCl浸渍可以降低生物质的活化能，同时在热解过程中捕获并固定含氧有机物。这种新型生物炭对有机物具有较高的吸附能力，例如双酚A（BPA）。吸附结果表明，改性生物炭的吸附能力比原始生物炭提高了364.5%。最终的性能提升与环境的限制条件和热解程序有关。这些程序最终改变了改性生物炭的孔隙分布、官能团类型、芳香性和缺陷程度。本研究对于筛选用于鉴定具有优异吸附效果的化合物的合成途径具有重要意义。
