Adsorptive removal of nitroimidazole antibiotics from water using porous carbons derived from melamine-loaded MAF-6

J Hazard Mater. 2019 Oct 15:378:120761. doi: 10.1016/j.jhazmat.2019.120761. Epub 2019 Jun 12.

Abstract

Nitrogen-containing carbons were obtained via pyrolysis of melamine-loaded metal azolate frameworks (named mela@MAF-6), a sub-class of metal organic frameworks. The porosity and defect concentration of the obtained carbons (named as CDM@M-6) were dependent on the quantity of melamine loaded in the mela@MAF-6. The CDM@M-6 s were applied for the adsorptive removal of nitroimidazole antibiotics (NIABs) from water; the performance of CDM@M-6, particularly CDM(0.25)@M-6, was outstanding for the elimination of NIABs such as dimetridazole (DMZ), metronidazole (MNZ), and menidazole (MZ)) from water. The adsorption capacity of CDM(0.25)@M-6 for DMZ, MNZ, and MZ was higher than that of any adsorbent reported so far. The highest adsorptive performance of CDM(0.25)@M-6 for DMZ (Q0: 621 mg/g) and MNZ (Q0: 702 mg/g) was explained by hydrogen bonding, where CDM@M-6 and DMZ/MNZ acted as a H-donor and H-acceptor, respectively. In addition, CDM(0.25)@M-6 could be regenerated via ethanol washing and reused for next cycles without any severe decrease in performance. Therefore, CDM@M-6 is recommended as a suitable adsorbent for the elimination of NIABs from water.

Keywords: Adsorption; Hydrogen bonding; Metal-azolate frameworks; Nitrogen containing carbons; Nitroimidazole antibiotics.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adsorption
  • Anti-Bacterial Agents / pharmacology*
  • Carbon / chemistry*
  • Ethanol / chemistry
  • Hydrogen Bonding
  • Kinetics
  • Metal-Organic Frameworks
  • Nitrogen
  • Nitroimidazoles / pharmacology*
  • Porosity
  • Pyrolysis
  • Triazines / chemistry*
  • Water
  • Water Pollutants, Chemical / chemistry*
  • Water Purification
  • X-Ray Diffraction

Substances

  • Anti-Bacterial Agents
  • Metal-Organic Frameworks
  • Nitroimidazoles
  • Triazines
  • Water Pollutants, Chemical
  • Water
  • Ethanol
  • Carbon
  • melamine
  • Nitrogen