Effect of Activated Carbon Fiber Properties on Ca2+ Removal by Capacitive Deionization

摘要: Three activated carbon fibers, namely Sample A, B, and C, were used as electrodes for Ca2+ removal by capacitive deionization in this study. The physical properties of ACFs comprehensively investigated with regard to surface area, pore volume, size distribution, specific capacitance, contact angle. An internal correlation was intended reveal between the ACF their CDI performance. Pseduo-first-order adsorption kinetics model could successfully depict different electrodes. Based on fitting parameters, B highest hydrophilicity exhibited equilibrium electrosorption capacity (9.977 mg-Ca2+/g-ACF). However, A average diameter (2.4 nm) has rate constant (0.074/min). Even though abundant micropores diameters less than 2 nm created large area its uptake not good that A.