High yielded Co-C derived from polyester-Cobalt carbothermal reduction for efficient activation of peroxymonosulfate to degrade levofloxacin

Hang Lv; Yuandong Huo; Manlu Cheng; Zenghui Diao; Gang Song; Diyun Chen; Lingjun Kong

doi:10.1016/j.chemosphere.2023.139020

High yielded Co-C derived from polyester-Cobalt carbothermal reduction for efficient activation of peroxymonosulfate to degrade levofloxacin

Chemosphere. 2023 Sep:335:139020. doi: 10.1016/j.chemosphere.2023.139020. Epub 2023 May 27.

Authors

Hang Lv¹, Yuandong Huo¹, Manlu Cheng¹, Zenghui Diao², Gang Song¹, Diyun Chen¹, Lingjun Kong³

Affiliations

¹ Guangdong Provincial Key Laboratory of Radionuclides Pollution Control and Resources, School of Environmental Science and Engineering, Guangzhou University, Guangzhou, 510006, China.
² School of Environmental Science and Engineering, Zhongkai University of Agriculture and Engineering, Guangzhou, 510225, China.
³ Guangdong Provincial Key Laboratory of Radionuclides Pollution Control and Resources, School of Environmental Science and Engineering, Guangzhou University, Guangzhou, 510006, China. Electronic address: kongljun@gzhu.edu.cn.

PMID: 37247677
DOI: 10.1016/j.chemosphere.2023.139020

Abstract

A kind of high yield and recyclable Cobalt-Carbon composite (Zn₁Co₅/P_nC) was prepared by carbothermal reduction process, in which the cobalt acetate and zinc acetate were considered as Zn and Co precursors, and the polyester waste was evolved as the carbon precursor. The morphology, structure and composition of the composite were characterized using scanning electron microscopy, X-ray diffraction and X-ray photoelectron spectroscopy. Results showed that evaporation of zinc contributed to the formation of porous carbon structure, and the Co nanoparticles were wrapped and protected by the porous carbon matrix. The Zn₁Co₅/P_nC activated peroxymonosulfate (PMS) system (Zn₁Co₅/P_nC/PMS) was constructed to degrade the levofloxacin (LEV). The activity and mechanism of LEV degradation was understood. The LEV degradation efficiency was high to 96.60% within 90 min in the presence of Zn₁Co₅/P₄C. Moreover, the Zn₁Co₅/P₄C still maintained favorable PMS activation performance after five-cycle runs. The results show that the Zn₁Co₅/P₄C played positive role in activating the PMS, it may be due to the facts that the polyester derived carbon could supported the Co while the evaporated Zn could increase the surface area of Zn₁Co₅/P₄C, leading to the increased activity. The possible degradation pathways were proposed by identifying the intermediate products through liquid chromatography-mass spectrometry analysis. This study put forward a promising method to use polyester waste to synthesize high yield cobalt-carbon composite for degrading the antibiotic in wastewater.

Keywords: Cobalt; Levofloxacin; Peroxymonosulfate activation; Polyester waste; Zinc.

MeSH terms

Carbon / chemistry
Cobalt* / chemistry
Levofloxacin*
Peroxides / chemistry

Substances

peroxymonosulfate
Levofloxacin
Cobalt
Peroxides
Carbon