Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
4996603 | Bioresource Technology | 2017 | 30 Pages |
Abstract
Superabsorbent polymers (SAPs) are considered suitable amendments for reducing the selection pressure due to heavy metals and the abundances of antibiotic resistance genes (ARGs) during composting. In this study, three SAP (sodium polyacrylate) levels (0, 5, and 15 mg kgâ1 of compost) were applied and their effects on the abundances of ARGs, mobile genetic elements (MGEs), and the bacterial community were investigated. After composting, the abundances of ARGs and MGEs decreased to different extent, where the removal efficiencies for tetW, dfrA7, ermX, aac(6â²)-ib-cr and MGEs exceeded 90%. The high SAP concentration significantly reduced the abundances of ARGs and MGEs, and changed the microbial community. Redundancy analysis indicated that the moisture content mainly explained the changes in ARGs and MGEs. Network analysis determined the potential hosts of ARGs and MGEs, and their co-occurrence. The results suggested that applying 15 mg kgâ1 SAP is appropriate for reducing ARGs in compost.
Keywords
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Process Chemistry and Technology
Authors
Aiyun Guo, Jie Gu, Xiaojuan Wang, Ranran Zhang, Yanan Yin, Wei Sun, Xiaxia Tuo, Li Zhang,