The effective removal of chloramphenicol by the reduced graphene oxide anchored nZVI/aluminum hybrid under neutral conditions

Yujia Yang,Lejin Xu

doi:10.1051/e3sconf/202125202054

Abstract

In this study, a reduced graphene oxide anchored nZVI/Al hybrid (rGO@nZVI/Al) was synthesized for effective degradation of chloramphenicol (CAP) at neutral pH just through the activation of dissolved oxygen (DO). The morphology and physicochemical features of rGO@nZVI/Al were characterized with the field emission scanning electron microscopy combined with energy dispersive spectroscopy (SEM-EDS), Brunauer-Emmet-Teller surface area analysis (BET) and X-ray diffraction (XRD). The CAP removal by rGO@nZVI/Al was conducted at neutral pH, and the performance of rGO@nZVI/Al for DO activation was also estimated in view of the effect of various systems. The reusability of rGO@nZVI/Al was investigated through the cycle tests and the variation of UV spectrum for further application.

Highlights

The occurrence of antibiotic contaminants in aquatic environment presents strong correlation to the generation of antibiotic-resistant bacteria and antibiotic resistance genes, which has posed potential threats to the ecosystem and human health
The morphology of synthesized rGO@nanoscale zero valent iron (nZVI)/Al can be observed in Fig. 1a, b
The rGO@nZVI/Al was prepared via a simple selfassembly process of liquid-phase reduction mentioned in our previous study[7], and the atomic ratio of Fe/Al loading on the rGO matrix was kept at 8:1

Summary

Introduction

The occurrence of antibiotic contaminants in aquatic environment presents strong correlation to the generation of antibiotic-resistant bacteria and antibiotic resistance genes, which has posed potential threats to the ecosystem and human health To remediate these polluted aqueous environments, various technologies have been developed to remove antibiotics from water, including adsorption[1], photo-degradation[2], catalytic oxidation[3], biodegradation[4], and microwave radiation[5]. Some researchers reported that bimetallic nZVI hybrids, including Fe/Cu[8], Fe/Ag[9] and Fe/Ni[10], were able to alleviate the pHdependent degradation of organics by nZVI-based materials For these samples, adding extra oxidants is necessary for the efficient removal of contaminants, which would increase the cost of water remediation. The reutilization of rGO@nZVI/Al was investigated by the recycling tests combined with the ultraviolet spectra analysis

Chemicals and agents

Characterization

Preparation and characterization of samples

Batch experiments and sample analysis

The effective removal of CAP

Conclusions