| dc.description.abstract | The sources of organic pollution in the environment mainly include the wastewater from food factories, petrochemicals, pesticides, plastics, dyes, and etc. The impact of organic compounds for environmental, including the decline of dissolved oxygen in aquaculture, difficult to resolve in water and creature, and etc.
To prepare of activated carbon electrode to remove organic compound (potassium hydrogen phthalate, KHP) via CDI experiment from aqueous solutions. On the other hand, the influences of flow rate, initial concentration and applied voltage are investigated. TiO2/AC composite powder was prepared with the sol–gel method and further discuss about the addition of TiO2 whether enhance CDI desalination efficiency than the carbon electrode. Four kinetic models, including pseudo-first-order, pseudo-second-order, Elovich, and intra-particle diffusion models, were employed to fit the electrosorption kinetic of KHP. All the mesopore ratios of electrode material are higher than 80%, which indicate that the mesopore play an important role in this study. From XRD analysis of the TiO2/AC composite electrode indicates that can obtain a good anatase crystalline by the sol-gel method and the optimum anatase crystal strength was prepared at the 500℃. It is possible to know from the CDI experiment that the best operating conditions of AC electrode for removing KHP were the flow rate of 60 ml/min and the initial concentration of 50 ppm. The adsorption kinetics could be described by the pseudo-second-order model.
The 10 wt.% TiO2/AC composite electrode has better removal amount of KHP than the AC electrode, which means the addition of titanium dioxide has the effect of improving the activated carbon. In addition, the adsorption cycle performance of CDI indicates that 10 wt.% TiO2/AC composite electrode has better durability and stability than AC electrode. | en_US |