Exploring the effects of heavy metal passivation under Fenton-like reaction on the removal of antibiotic resistance genes during composting. (September 2022)

• Record Type: Journal Article
• Authors: Niu, Qiuqi; Li, Kecheng; Yang, Hongxiang; Zhu, Pengfei; Huang, Yite; Wang, Yiwu; Li, Xiaolan; Li, Qunliang
• Is Part Of: Bioresource technology. Volume 359(2022)
• Publication Date: 2022-09
• Subjects: Composting -- Fenton-like reaction -- Heavy metal passivation -- Antibiotic resistance genes -- Host bacterial taxa; Biomass -- Periodicals; Biomass energy -- Periodicals; Bioremediation -- Periodicals; Agricultural wastes -- Periodicals; Factory and trade waste -- Periodicals; Organic wastes -- Periodicals; Bioénergie -- Périodiques; Déchets agricoles -- Périodiques; Déchets industriels -- Périodiques; Déchets organiques -- Périodiques; Déchets (Combustible) -- Périodiques; 662.88
• DOI: 10.1016/j.biortech.2022.127476
• Languages: English
• ISSNs: 0960-8524

Abstract

Graphical abstract: Highlights: The Fenton-like reaction in composting promoted the passivation of Zn, Ni and Mn. The heavy metals passivation synergistically promoted the ARGs removal. The succession of host bacterial carrying ARGs was explored in composting. Proteobacteria, Firmicutes and Actinobacteria were the main carriers of ARGs. The Fenton-like reaction added the contribution degree of Proteobacteria to ARGs. Abstract: This study aims to explore the succession of microbes carrying antibiotic resistance genes (ARGs), the relationship between heavy metal speciation and ARGs via Fenton-like reaction during composting. The results indicated that the passivation of Cu and Ni was more prominent, and the Fenton-like reaction promoted exceptionally the passivation of Zn, Ni and Mn. The removals of macrolides-lincosamids-streptogramins (MLS), aminoglycoside and tetracycline resistance genes were induced with the composting process, but the relative abundance of bacitracin resistance genes increased. Additionally, Proteobacteria, Firmicutes, Actinobacteria and Bacteroidetes were main carriers and disseminators of ARGs, and the Fenton-like reaction improved the contribution degree of Proteobacteria to bacitracin, tetracycline and aminoglycoside resistance genes. Redundancy analysis revealed the passivation of heavy metal contributed to the removal of tetracycline, MLS and aminoglycoside resistance genes. Conclusively, the Fenton-like reaction promoted the passivation of Zn, Ni and Mn, and controlled the abundance of bacitracin resistance genes in composting.