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Impact of biochar-induced vertical mobilization of dissolved organic matter, sulfamethazine and antibiotic resistance genes variation in a soil-plant system
- Source :
- Journal of hazardous materials. 417
- Publication Year :
- 2021
-
Abstract
- The migration risk of antibiotic and antibiotic resistance genes (ARGs) have attracted lots of attentions due to their potential threaten to public health. Strategies to reduce their vertical mobilization risk are urgently required for groundwater safety and human health. Biochar enjoys numerous interests due to its excellent sorption affinity. However, little was known about the efficacy of biochar amendment in impeding the vertical mobilization of antibiotic and ARGs. To fill this gap, a column study was carried out to investigate biochar-induced variations in the leaching behavior of dissolved organic matter (DOM), sulfamethazine (SMZ) and ARGs. Results showed that biochar addition enhanced DOM export from soil, changed its composition and impeded the vertical transport of SMZ. Biochar amendment could effectively decrease the occurrence of extracellular and intracellular sul2 in soil and impede its vertical transportation, however, it did not work out with sul1 gene. Structural equation modeling analysis demonstrated that the abundance of sul2 was significantly controlled by SMZ concentration, while the primary drivers of sul1 were SMZ concentration and DOM content. These results indicated the failure in inhibiting the vertical transfer of sul1 under biochar amendment and highlighted the important role of DOM in the leaching of soil ARGs.
- Subjects :
- Environmental Engineering
Health, Toxicology and Mutagenesis
0211 other engineering and technologies
Amendment
02 engineering and technology
010501 environmental sciences
complex mixtures
01 natural sciences
Soil
Dissolved organic carbon
Biochar
Environmental Chemistry
Humans
Leaching (agriculture)
Waste Management and Disposal
0105 earth and related environmental sciences
021110 strategic, defence & security studies
Mobilization
Sorption
Drug Resistance, Microbial
Sulfamethazine
Pollution
Environmental chemistry
Charcoal
Environmental science
Groundwater
Antibiotic resistance genes
Subjects
Details
- ISSN :
- 18733336
- Volume :
- 417
- Database :
- OpenAIRE
- Journal :
- Journal of hazardous materials
- Accession number :
- edsair.doi.dedup.....a5c047f63dc8009ca547339b4651ff28