Exploring the effects of heavy metal passivation under Fenton-like reaction on the removal of antibiotic resistance genes during composting

被引：22

作者：

Niu, Qiuqi ^{[1
]}

Li, Kecheng ^{[1
]}

Yang, Hongxiang ^{[1
]}

Zhu, Pengfei ^{[1
]}

Huang, Yite ^{[1
]}

Wang, Yiwu ^{[1
]}

Li, Xiaolan ^{[1
]}

Li, Qunliang ^{[1
]}

机构：

[1] Guangxi Univ, Sch Chem & Chem Engn, Nanning 530004, Peoples R China

来源：

BIORESOURCE TECHNOLOGY | 2022年 / 359卷

基金：

中国国家自然科学基金;

关键词：

Composting; Fenton-like reaction; Heavy metal passivation; Antibiotic resistance genes; Host bacterial taxa; BACTERIAL COMMUNITY; MANURE; TRANSFORMATION; SPECIATION; DIVERSITY; ABUNDANCE; SOIL;

D O I：

10.1016/j.biortech.2022.127476

中图分类号：

S2 [农业工程];

学科分类号：

0828 ;

摘要：

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.

引用

页数：10

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