Highly Effective Removal of Ofloxacin from Water with Copper-Doped ZIF-8

Abstract

Residual antibiotics in wastewater have gained widespread attention because of their toxicity to humans and the environment. In this work, Cu-doped ZIF-8s (Cu-ZIF-8s) were successfully synthesized by the impregnation of Cu2+ in ZIF-8 and applied in the removal of ofloxacin (OFX) from water. Remarkably, excellent adsorption performance was obtained in Cu-ZIF-8s, especially for Cu-ZIF-8-1, in which the adsorption capacity (599.96 mg·g−1) was 4.2 times higher than that of ZIF-8 and superior to various adsorbents reported previously. The adsorption kinetics and adsorption isotherm follow the pseudo-second-order model and the Langmuir model, respectively. Furthermore, the removal efficiencies of OFX in Cu-ZIF-8-1 reached over 90% at low concentrations. It was revealed that electrostatic interaction and complexation play important roles in the adsorption process. In addition, the material can be regenerated by simple methods. Therefore, the obtained Cu-doped MOFs may have a promising application in the treatment of antibiotic-containing wastewater.

Efficient synthesis of glycerol carbonate by doping metallic copper in palladium-catalyzed glycerol system for carbonylation reaction

“…S3a †), further corroborates the almost complete vaporization of calcined Zn ions. 26 Specifically, the positions of Zn 2p 1/2 and Zn 2p 3/2 peaks, located at 1043.88 eV and 1021.81 eV, respectively (Fig. S3b †), substantiate the prevalence of Zn 2+ in elemental Zn, primarily in the form of Zn 2+ .…”

Recent advancements in fluoroquinolones removal techniques from wastewater

“…The availability for reusage was invest aged was well that showed upon four cycles the effi ciency dropped just to 80.2% [23]. Wang, et al [24] synthesized Cu-ZIF-8's to remove ofl oxacin from wastewater through impregnation of Cu 2+ in ZIF-8. The latter adsorbents were capable of removing ofl oxacin 4.2 times more than ZIF-8 alone.…”

A review of the antibiotic ofloxacin: Current status of ecotoxicology and scientific advances in its removal from aqueous systems by adsorption technology

“…Significant amounts of OFL are released into water globally in their original chemical form or as metabolites [17,18]. As a result, OFL has been detected in wastewater ( at concentrations ranging from 100 ng L -1 -10 μg L -1 ), groundwater, and drinking water [19][20][21][22]. The highest levels have been observed in hospitals and pharmaceutical industries effluents, with concentrations reaching up to 500 mg L -1 [23].…”