AI Article Synopsis
- - The study investigates how two antibiotics, flumequine and florfenicol, behave in terms of water-sediment partitioning in the context of salmon aquaculture and its environmental implications.
- - Experiments conducted in different conditions (pure water, seawater, with and without sediment, and varying temperatures) reveal that florfenicol is more likely to adhere to particles than dissolve in water, while flumequine shows a stronger tendency to accumulate in sediments.
- - Flumequine demonstrates a higher affinity for sediment compared to florfenicol, indicating a significant potential for environmental accumulation of flumequine due to its stronger adsorption characteristics.
Article Abstract
The water-sediment partitioning of flumequine and florfenicol, two antibiotics used in salmon aquaculture is a critical driver of their fate and environmental impact. Batch experiments, were carried out using pure water or seawater, with or without sediment, and at summer and winter temperatures of Chilean fjords. Log K (partition between water and sediment) of florfenicol in seawater varied from 0.62 ± 0.69 to 0.67 ± 0.13, and Log K (partition between water and organic fraction of sediment) from 2.15± 0.29 to 2.19 ± 0.13. Difference between K and the octanol-water partition constant (K) showed that for florfenicol, adsorption onto the surface of particles was more significant than the absorption driven by hydrophobicity whilst hydrophobic absorption was a major driver of flumequine sorption. Flumequine Log K (0.92 ± 0.25 to 1.36 ± 0.10) and Log K (from 2.44 ± 0.25 to 2.89 ± 0.10) demonstrated its greater affinity than florfenicol to particles and potential accumulation into marine sediments.
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| http://dx.doi.org/10.1016/j.marpolbul.2022.113480 | DOI Listing |
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