Impact of biochar-induced vertical mobilization of dissolved organic matter, sulfamethazine and antibiotic resistance genes variation in a soil-plant system
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.
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Biochar, in addition to reducing the concentration of ARGs in the bulk soil, can inhibit horizontal gene transfer of ARGs and limit the vertical transport of ARGs in soil.
“Biochar, in addition to reducing the concentration of ARGs in the bulk soil, can inhibit HGT of ARGs and limit the vertical transport of ARGs in soil (Fang et al., 2022; Qiu et al., 2021).”
From Review of emerging contaminants in green stormwater infrastructure: antibiotic resistance genes, microplastics, tire wear particles, PFAS, and temperature (2024) · cites this paper as Qiu et al., 2021
The reduction in the vertical transport of ARGs extends to both intracellular and extracellular ARGs, but efficiency varies by gene.
“Moreover, the reduction in the vertical transport of ARGs was found to extend to both intracellular ARGs and extracellular ARGs but efficiency varied by gene (Qiu et al., 2021).”
From Review of emerging contaminants in green stormwater infrastructure: antibiotic resistance genes, microplastics, tire wear particles, PFAS, and temperature (2024) · cites this paper as Qiu et al., 2021
Cites
Lian, F., & Xing, B. (2017) · Environmental Science & Technology · doi:10.1021/acs.est.7b02528 · Cited by 641 · see citing works
Biochar amendment to soil changes dissolved organic matter content and composition
Smebye, A., Alling, V., Vogt, R. D., Gadmar, T. C., Mulder, J., Cornelissen, G., & Hale, S. E. (2016) · Chemosphere · doi:10.1016/j.chemosphere.2015.04.087 · Cited by 292 · see citing works
Liu, C., Wang, H., Tang, X., Guan, Z., Reid, B. J., Rajapaksha, A. U., Ok, Y. S., & Sun, H. (2016) · Environmental Science and Pollution Research · doi:10.1007/s11356-015-4885-9 · Cited by 175 · see citing works
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Bodus, B., O'Malley, K., Dieter, G., Gunawardana, C., & McDonald, W. (2024) · Science of The Total Environment · doi:10.1016/j.scitotenv.2023.167195 · Cited by 76 · see citing works
- Authors
- Qiu, L., Wu, J., Qian, Y., Nafees, M., Zhang, J., Du, W., Yin, Y., & Guo, H.
- ORCID
- Guo, Hongyan
- Venue
- Journal of Hazardous Materials
- Publisher
- Elsevier BV
- Published
- 2021-09
- Volume
- 417
- Pages
- 126022
- ISSN
- 0304-3894
- Cited by
- 54
- References
- 3
- Language
- en
- Licence
- Funders
- National Natural Science Foundation of China (41571130061)
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