Degradation of tetracycline by persulfate oxidation promoted by iron-modified biochar. (15th November 2022)

• Record Type: Journal Article
• Authors: Yu, Fangke; Song, Yan; Guo, Yueping; Yang, Jing
• Is Part Of: New journal of chemistry. Volume 46:Number 46(2022)
• Page Start: 22459
• Page End: 22468
• Publication Date: 2022-11-15
• Subjects: Chemistry -- Periodicals; Chimie -- Périodiques; 540
• DOI: 10.1039/d2nj03348h
• Languages: English
• ISSNs: 1144-0546

Abstract

Abstract : The accumulation of tetracycline (TC) in the aquatic environment increases the risk to ecosystems and human health due to its potential biological toxicity. Abstract : The accumulation of tetracycline (TC) in the aquatic environment increases the risk to ecosystems and human health due to its potential biological toxicity. The development of carbon-based materials with desirable features, including low cost, easy isolation and excellent peroxymonosulfate (PMS) activation performance, to generate reactive oxygen species toward TC degradation is essential but remains a great challenge. Herein, sustainable biomass kelp-derived self-nitrogen-doped biochar-stabilized Fe nanoparticles were developed for PMS activation toward TC degradation. The influence of calcination temperature on their microstructure was studied to further optimize the TC degradation performance. The Fe@BC/PMS system exhibited optimal performance in activating PMS to degrade TC, with a removal efficiency of 93% within 50 min. Additionally, the magnetic Fe@BC/PMS had robust recycling stability because of the enhanced interaction between Fe 2+ /Fe 3+ and graphitized biochar. The characterization results indicated the participation of Fe nanoparticles, graphite nitrogen, and a direct electron transfer process in PMS activation. Quenching experiments and electron paramagnetic resonance analyses revealed a combination of radical and non-radical pathways involved in TC degradation, with the non-radical pathway playing a dominant role. This study offers a facile and low-cost strategy to prepare an efficient PMS activator for antibiotic wastewater remediation.