标题：Comparisons of porous, surface chemistry and adsorption properties of carbon derived from Enteromorpha prolifera activated by H4P2O7and KOH
作者：Gao, Yuan ;Yue, Qinyan ;Gao, Baoyu ;Sun, Yuanyuan ;Wang, Wenyu ;Li, Qian ;Wang, Yan
作者机构：[Gao, Yuan ;Yue, Qinyan ;Gao, Baoyu ;Sun, Yuanyuan ;Wang, Wenyu ;Li, Qian ;Wang, Yan ] Shandong Provincial Key Laboratory of Water Pollution Control a 更多
来源：Chemical Engineering Journal
摘要：Enteromorpha prolifera based-activated carbons were prepared using chemical activation by H4P2O7(PAC) and KOH (KAC) and applied as a potential adsorbent for the adsorption of acid scarlet (GR). N2adsorption-desorption isotherms, scanning electron microscope (SEM), transmission electron microscope (TEM), X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS) and Boehm titration were used to compare the porous structure, surface chemical property and adsorption behavior of carbon. KAC presented higher surface area (3500m2/g) and larger total pore volume (2.872cm3/g). To account for the adsorption mechanisms, the kinetic models, including pseudo-first-order model, pseudo-second-order model, intraparticle diffusion model and Boyd model were introduced. The Langmuir isotherm model was better fitted with the equilibrium data than Freundlich and Dubinin-Radushkevich models. The maximum adsorption capacities of GR onto KAC and PAC were 2500mg/g and 454mg/g, respectively. The physical adsorption and ion-exchange were the dominating adsorption mechanism. © 2013 Elsevier B.V.