Industrial & Engineering Chemistry Research, Vol.59, No.1, 146-153, 2020
Rapid Preparation of Activated Carbon Fiber Felt under Microwaves: Pore Structures, Adsorption of Tetracycline in Water, and Mechanism
Adsorption is one of the most efficient ways to remove antibiotics from water. Usually, adsorption of tetracycline (TC) is a typical practice for evaluating the ability of an adsorbent to treat antibiotics in water. The adsorbent of activated carbon fiber (ACF) felt can be rapidly prepared using a microwave method. Moreover, the adsorption performance of the ACF felt for TC was evaluated using a dynamic adsorption device. The results show that the Freundlich equation, the Lagergren pseudo-first-order equation, and the liquid film diffusion model are more suitable for the elaboration of adsorption behavior. More importantly, the effect of the pore structure on the adsorption performance is reflected in the adsorption site provided by the specific surface area of the micropores and the adsorption force provided by the channels formed by the pores. The ACF in this study shows excellent TC adsorption performance compared to reported adsorbents, with a maximum absorption of 315.2 mg/g. The study on the adsorption mechanism indicates that the adsorption force comes from hydrogen bonds, pi-pi interaction, ACF pore structures, and wicking of the textiles. The excellent adsorption performance of ACF for TC predicts great potential in the field of water remediation.