Microporous carbon derived from hydroxyl functionalized organic network for efficient adsorption of flumequine: Adsorption mechanism and application potentials

Flumequine (FLU) is a kind of fluoroquinolone antibiotics and has become a concerned pollutant as following widespread use of antibiotics and abuse to some extends. In this study, a microporous carbon derived from hydroxyl functionalized organic network (MON-OH-C) was prepared via the carbonization of a new member of MON-OH under nitrogen atmosphere at 500 degrees C. The adsorption kinetics, isotherm, thermodynamics and influence factors of pH, ionic strength, and humic acid on MON-OH-C for FLU adsorption were investigated in detail. The regeneration, reusability, application potentials and adsorption mechanism were further discussed. The adsorption of FLU on MON-OH-C accorded with the pseudo-second-order kinetic and Sips adsorption models. Rely on the interaction of pi - pi and hydrogen bonding between FLU and MON-OH-C, the maximum adsorption capacity for FLU under the static and solid phase extraction (SPE) dynamic conditions were 279.8 and 180.1 mg.g(-1), which were higher than many other reported adsorbents. MON-OH-C can be anticipated as a powerful adsorbent owing to its large surface area, physical and chemical stability, good water dispersibility, high adsorption and regeneration capability. It has great application potentials in adsorption removal, SPE sample pretreatment, and fix bed column. This work promoted the development of new synthesis strategy and the extensive application of pollutant removals by MON-OH-C in environmental science.