Water-sediment partitioning of flumequine and florfenicol, two antibiotics used in salmon aquaculture in Chile

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...

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Published in:Marine pollution bulletin Vol. 177; p. 113480
Main Authors: Jara, Bibiana, Srain, Benjamín M., Aranda, Mario, Fernández, Camila, Pantoja-Gutiérrez, Silvio, Méjanelle, Laurence
Format: Journal Article
Language:English
Published: England Elsevier Ltd 01.04.2022
Elsevier BV
Elsevier
Subjects:
Absorption
adsorption
Antibiotics
Aquaculture
Biodiversity and Ecology
Chile
Emerging pollutant
Environmental impact
Environmental Sciences
Fjords
Florfenicol
Flumequine
Hydrophobicity
Kd and Koc
marine pollution
Marine sediments
Octanol
Partitioning
Salmon
Salmon culture
Seawater
Sediment
Sediments
Sorption
summer
Chile
Sorption
Flumequine
Kd and Koc
Florfenicol
Emerging pollutant
K(d) and K(oc)
ISSN:0025-326X, 1879-3363, 1879-3363
Online Access:Get full text
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Summary: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 Kd (partition between water and sediment) of florfenicol in seawater varied from 0.62 ± 0.69 to 0.67 ± 0.13, and Log KOC (partition between water and organic fraction of sediment) from 2.15± 0.29 to 2.19 ± 0.13. Difference between KOC and the octanol-water partition constant (KOW) 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 Kd (0.92 ± 0.25 to 1.36 ± 0.10) and Log KOC (from 2.44 ± 0.25 to 2.89 ± 0.10) demonstrated its greater affinity than florfenicol to particles and potential accumulation into marine sediments. [Display omitted] •Flumequine has a greater affinity for sediment particles than florfenicol.•In seawater, 11 ± 5% of florfenicol and 24 ± 7% of flumequine are sorbed to particles.•Surface-driven processes control the sorption of florfenicol (KOC)< KOW).•Hydrophobic absorption drivesi dissolved-particle partition of flumequine (KOC ≈ KOW)•The formation of complexes with seawater ions lowers florfenicol concentration by 13 ± 8% with respect to Milli-Q water.
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ISSN:0025-326X
1879-3363
1879-3363
DOI:10.1016/j.marpolbul.2022.113480