Antibiotics have been widely used as a veterinary medicine and as medication for humans. However, they have also become an emerging pollutant in water; environmental residues increase the resistance of bacteria. What's worse, resistance genes continuing to expand and evolve in the environment could even create "super bacteria".
Given this, a study team led by Prof. Kong Lingtao from the Institute of Intelligent Machines under Hefei Institutes of Physical Science has synthesized new Zr-MOFs nanomaterials successfully to remove antibiotics from water.
The researchers used a simple hydrothermal method to synthesize the Zr-MOFs (UiO-66-NH2) with excellent stability in water and applied them to the experimental study of removing norfloxacin (NOR) antibiotics in water.
The adsorption capacities of UiO-66-NH2 reached a maximum of 222.5 mg/g for NOR, which were considerably higher than that of most reported adsorbents.
At a concentration of 10 mg/L, the highest partition coefficient of 20.9 mg/g/μM was obtained, and the removal rate of NOR was as high as 91.6%, implying that UiO-66-NH2 offered considerable adsorption performance at a low concentration of NOR.
Finally, several credible adsorption mechanisms were proposed.
Fang et al. (2020). High-efficiency adsorption of norfloxacin using octahedral UIO-66-NH2 nanomaterials: Dynamics, thermodynamics, and mechanisms. Applied Surface Science. DOI: https://doi.org/10.1016/j.apsusc.2020.146226
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