The effects of environmental conditions on the enrichment of antibiotics on microplastics in simulated natural water column
Abstract
Concerns regarding the release of microplastics (MPs) into the environment led us to explore the relationship between the different environmental factors and physicochemical properties of MPs, as well as the change of interaction between MPs and organic pollutants. In this study, the effects of environmental factors (ageing conditions), such as pH, temperature, ionic strength, ageing time, and humic acid (HA) concentration, on the characteristics of MPs and their adsorption toward tetracycline (TC) were systematically investigated. The results showed that ageing factors such as pH, ionic strength, and temperature were found to have little impact on the adsorptive capacity of MPs for TC. However, MPs aged in HA solution exhibited a significant decreased adsorptive capacity for TC. HA, which has numerous functional groups, can cover the surface of MPs and change their hydrophobicity, thereby reducing the adsorption affinity to TC. The electrostatic repulsion between adsorbed HA and TC molecules may also decrease the adsorption of TC. In addition, the competing effect of HA for adsorption sites on the surface of MPs further reduces the adsorption of TC. The data presented in this work provide useful information for understanding the transfer of antibiotics by aged MPs, which is of fundamental importance to assess the environmental impact of MPs.
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Natural organic matter may compete for sorption sites, impacting the sorption capacity of microplastics.
“the presence of natural organic matter that may compete for sorption sites (Shen et al., 2018)”
From Review of emerging contaminants in green stormwater infrastructure: antibiotic resistance genes, microplastics, tire wear particles, PFAS, and temperature (2024) · cites this paper as Shen et al., 2018
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Hu, C., Xiao, Y., Jiang, Q., Wang, M., & Xue, T. (2024) · Environmental Science and Pollution Research · doi:10.1007/s11356-024-33131-1 · Cited by 16 · see citing works
“MPs are pollutants that are widely distributed in environmental media such as oceans, rivers, lakes, sediments, and soils (Fiore et al. 2022; Hu et al. 2021; Li et al. 2018, 2021; Shen et al. 2018), and are even found in polar areas (Berg-mann et al. 2019; Ding et al. 2023).”
- Authors
- Shen, X.-C., Li, D.-C., Sima, X.-F., Cheng, H.-Y., & Jiang, H.
- Venue
- Environmental Research
- Publisher
- Elsevier BV
- Published
- 2018-10
- Volume
- 166
- Pages
- 377-383
- ISSN
- 0013-9351
- Cited by
- 124
- References
- 6
- Language
- en
- Funders
- National Natural Science Foundation of China (21677138)
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