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Optimization of Fenton process on removing antibiotic resistance genes from excess sludge by single-factor experiment and response surface methodology
- Source :
- The Science of the total environment. 788
- Publication Year :
- 2021
-
Abstract
- Excess sludge contains large amounts of antibiotic resistance genes (ARGs) and mobile genetic elements (MGEs), posing a risk for human health. However, most current studies usually ignored their abundance and removal in excess sludge. Therefore, this study aimed to reduce ARGs/MGEs in sludge by Fenton process, and applied single-factor experiment (SFE) and response surface methodology (RSM) to optimize the Fenton reaction condition for higher removal rates of ARGs/MGEs. The results demonstrated that the removal rates of target genes by SFE optimized condition ranged from 10.91% to 66.86%, while the removal rates caused by RSM optimized condition were 48.02% - 76.36%, indicating RSM was a useful tool to improve the removal rates of ARGs in excess sludge. Additionally, the scanning electron microscope and cell apoptosis results suggested that the Fenton treatment altered the structure of sludge and reduced the numbers of normal cells, thus causing the reductions of target genes.
- Subjects :
- Fenton reaction
Environmental Engineering
010504 meteorology & atmospheric sciences
Sewage
Abundance (chemistry)
Chemistry
Single factor
Drug Resistance, Microbial
010501 environmental sciences
Pulp and paper industry
01 natural sciences
Pollution
Anti-Bacterial Agents
Human health
Genes, Bacterial
Environmental Chemistry
Humans
Response surface methodology
Waste Management and Disposal
0105 earth and related environmental sciences
Antibiotic resistance genes
Subjects
Details
- ISSN :
- 18791026
- Volume :
- 788
- Database :
- OpenAIRE
- Journal :
- The Science of the total environment
- Accession number :
- edsair.doi.dedup.....94ce0638906b9c6cda5e647ea683a316