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Microplastic and antibiotics in waters: Interactions and environmental risks
Summary
This review examines how antibiotics adsorb onto microplastic surfaces in natural waters and the resulting environmental risks from their co-migration. Researchers found that the adsorption process is driven mainly by hydrophobic forces, hydrogen bonds, and electrostatic interactions, and is influenced by environmental factors like pH and temperature. The study suggests that microplastics carrying adsorbed antibiotics may increase the spread of antibiotic resistance and amplify ecological harm in aquatic environments.
Antibiotics (ATs) are ubiquitously detected in natural waters worldwide, and their tendency to co-migrate with microplastics (MPs) post-adsorption leads to heightened environmental risk. Research on the adsorption of ATs on MPs and their subsequent effects on the environmental risks is gaining significant attention globally. This adsorption process predominantly occurs through hydrophobic forces, hydrogen bonds, and electrostatic interactions and is influenced by various environmental factors. The interaction between MPs and ATs exhibited varying degrees of efficiency across different pH levels and ionic strengths. Furthermore, this paper outlines the environmental risks associated with the co-presence of MPs and ATs in aquatic environments, emphasizing the potential effect of MPs on the distribution of antibiotic resistance genes (ARGs) and related environmental risks. The potential hazards posed by MPs and ATs in aquatic systems warrant serious consideration. Future research should concentrate on the adsorption of ATs/ARGs on MPs under real environmental conditions, horizontal gene transfer on MPs, as well as biofilm formation and agglomeration behavior on MPs that needs to be emphasized.
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