Adsorption behavior of Fe3+ from condensed water on activated carbon fiber and ACF's regeneration

作者：Zhong Xuanbin; Guo Jianwei^*; Fu Baolin; Peng Jinping; Yang Yucheng

来源：Journal of Central South University(Science and Technology), 2014, 45(6): 1778-1783.

• Adsorption properties
• Condensed water
• Electrochemical regeneration
• Electrolyte concentration
• Iron ions
• Regeneration mechanisms
• Regenerative process
• Sulfate concentrations

The adsorption properties of Fe3+ on the activated carbon fiber (ACF) were systematically investigated by the static and the dynamic adsorption experiments, in which the adsorption isotherms and the dynamic breakthrough curves of the ACF were measured. The regenerative process of the ACF was achieved using electric field and the effects of regeneration parameters such as regeneration voltage,the auxiliary agent and electrolyte concentration on the rate of regeneration were studied. And the regeneration mechanism was preliminary discussed. What's more, the surface morphology before and after regeneration of ACF was investigated by scanning electron microscopy (SEM). The results show that the model of Fe3+ adsorption meets with the Langmuir isotherm equation to some degree. The best quality of the treated water can be obtained when the flow rate is of 10 mL/min in the process of the dynamic adsorption experiment. A high regeneration rate (84.2%) can be obtained in the best conditions when the voltage is 1100 mV, the content of citric acid is 4.8%, the sodium sulfate concentration is 0.7 mmol/L and the time of treatment is 2 h, respectively. The regenerative voltage, dosage of the auxiliary agent and electrolyte concentration play a significant role in the rate of regeneration.

• 出版日期2014