Journal
SCIENCE OF THE TOTAL ENVIRONMENT
Volume 654, Issue -, Pages 292-299Publisher
ELSEVIER
DOI: 10.1016/j.scitotenv.2018.11.094
Keywords
Anaerobic digestion; Antibiotic resistance gene; Graphene oxide; Metal resistance gene; Mobile genetic element
Categories
Funding
- National Natural Science Foundation of China [41671474, 41601531]
- Science and Technology Plan Key Project of Shaanxi Province [2017ZDCXL-SF-03-03]
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The pollution of various environments with antibiotic resistance genes (ARGs) is an urgent problem that needs to be addressed, especially in heavy metal-polluted environments. This study investigated the responses of ARGs and mobile genetic elements (MGEs) to the addition of graphene oxide (GO) to swine manure containing a high concentration copper during anaerobic digestion. The total copy numbers of ARGs and MGEs were significantly enhanced by the pressure due to Cu, GO significantly decreased the ARG and MGE copy numbers, where the low GO concentration performed better than the high GO concentration. Network analysis showed that most of the ARGs and MGEs co-occurred and they shared the same major potential host bacteria. The contributions of different factors to ARG abundances were assessed by redundancy analysis and MGEs had the most important effect on the fate of ARGs. Thus, GO may reduce the abundance of ARGs mainly by removing MGEs. (C) 2018 Elsevier B.V. All rights reserved.
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