Instituto Nacional del Carbón, CSIC, 26-33011 Oviedo, Spain.
J Hazard Mater. 2011 Sep 15;192(3):1525-32. doi: 10.1016/j.jhazmat.2011.06.072. Epub 2011 Jul 1.
A coal-tar-derived mesophase was chemically activated to produce a high surface area (~3200 m(2)/g) carbon with a porosity made up of both micropores and mesopores. Its adsorption capacities were found to be among the highest ever reported in literature, reaching values of 860 mg/g and 1200 mg/g for the adsorption of benzene and toluene, respectively, and 1200 mg/g for the combined adsorption of benzene and toluene from an industrial wastewater. Such high values imply that the entire pore system, including the mesopore fraction, is involved in the adsorption process. The almost complete pore filling is thought to be due to the high relative concentrations of the tested solutions, resulting from the low saturation concentration values for benzene and toluene, which were obtained by fitting the adsorption data to the BET equation in liquid phase. The kinetics of adsorption in the batch experiments which were conducted in a syringe-like adsorption chamber was observed to proceed in accordance with the pseudo-second order kinetic model. The combined presence of micropores and mesopores in the material is thought to be the key to the high kinetic performance, which was outstanding in a comparison with other porous materials reported in the literature.
一种源自煤焦油的中间相经化学活化后，制得具有高比表面积（~3200 m²/g）的含微孔和中孔的碳材料。其吸附能力在文献报道中属于最高之列，对苯和甲苯的吸附容量分别达到 860mg/g 和 1200mg/g，对工业废水中苯和甲苯的联合吸附容量也达到 1200mg/g。如此高的吸附容量表明，整个孔系统，包括中孔部分，都参与了吸附过程。几乎完全的孔填充被认为是由于测试溶液的相对浓度较高，这是由于苯和甲苯的饱和浓度值较低，通过将吸附数据拟合到液相中的 BET 方程得到。在注射器状吸附室内进行的间歇实验的吸附动力学符合准二级动力学模型。材料中微孔和中孔的共同存在被认为是其高动力学性能的关键，这在与文献中报道的其他多孔材料的比较中表现突出。
