Lin Chiou-Liang, Huang Chun-Yi, Liu Zhen-Shu
Department of Civil and Environmental Engineering, National University of Kaohsiung, Kaohsiung 811726, Taiwan.
Department of Safety, Health and Environmental Engineering, Ming Chi University of Technology, New Taipei City 24301, Taiwan.
Toxics. 2024 Jul 24;12(8):537. doi: 10.3390/toxics12080537.
This study utilized activated carbon fibers (ACFs) as adsorbents to investigate the removal efficiency of naphthalene and toluene at elevated temperatures and their competitive adsorption behavior. Three types of ACFs, inlet concentrations of naphthalene (343, 457, and 572 mg·Nm), and toluene (2055, 2877, and 4110 mg·Nm) were investigated to determine the adsorption capacities of naphthalene and toluene. To study the reaction mechanisms of naphthalene and toluene on the ACFs, the BET, SEM, FTIR, and TGA methods were used to examine the physical and chemical characteristics of ACFs. Results showed ACF-A's superior adsorption capacity for naphthalene that was attributed to its mesoporous structure and hydrophobicity. Adsorption equilibrium studies indicated multilayer adsorption behavior. Competitive adsorption experiments demonstrated the displacement of toluene by naphthalene on ACF-A, highlighting its higher selectivity for naphthalene. Functional group analysis revealed changes in ACF surfaces after naphthalene adsorption, suggesting π-π dispersion and electron donor-acceptor interactions. Overall, this study underscores the importance of pore structure and surface properties in designing ACFs for the efficient adsorption of high-boiling-point organic pollutants.
本研究利用活性炭纤维（ACFs）作为吸附剂，研究高温下萘和甲苯的去除效率及其竞争吸附行为。研究了三种类型的ACFs、萘（343、457和572 mg·Nm）以及甲苯（2055、2877和4110 mg·Nm）的入口浓度，以确定萘和甲苯的吸附容量。为了研究萘和甲苯在ACFs上的反应机理，采用BET、SEM、FTIR和TGA方法考察了ACFs的物理和化学特性。结果表明，ACF-A对萘具有优异的吸附容量，这归因于其介孔结构和疏水性。吸附平衡研究表明存在多层吸附行为。竞争吸附实验证明了在ACF-A上萘对甲苯的置换作用，突出了其对萘的更高选择性。官能团分析揭示了萘吸附后ACF表面的变化，表明存在π-π色散和电子供体-受体相互作用。总体而言，本研究强调了孔结构和表面性质在设计用于高效吸附高沸点有机污染物的ACFs中的重要性。
