Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
576626 | Journal of Hazardous Materials | 2014 | 8 Pages |
Abstract
The potential bioaccumulation and distribution of antibiotics in non-target organisms have been inadequately studied in spite of their widespread occurrence in aquatic systems. We investigated the ability of tetracycline to bioaccumulate through aqueous and dietary routes in an aquatic organism, the freshwater crustacean Daphnia magna. D. magna was exposed to algal food (Pseudokirchneriella subcapitata) contaminated with tetracycline for dietary uptake. Tetracycline was transferred to D. magna more through aqueous uptake than through dietary uptake. The uptake rate constant of tetracycline for D. magna was kin,water = 0.33 ± 0.045 via the aqueous route and kin,food = 0.16 ± 0.012 via the dietary route for 1.0 mg Lâ1 tetracycline. Bioconcentration factors of 4.40 ± 0.91 L kgâ1 and 3.66 ± 0.50 L kgâ1 for 0.1 and 1.0 mg Lâ1 tetracycline were found for D. magna. The biomagnification factor of 0.19 ± 0.04 indicates that magnification of tetracycline through the food web will not occur. The change in the internal concentration of the target compound was also studied for multigenerational (F1-F4) exposure. The internal concentration in D. magna showed a decreasing trend with increasing generations except for the parent generation. The bioaccumulation tendency showed a biphasic change in multigenerational exposure.
Related Topics
Physical Sciences and Engineering
Chemical Engineering
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Authors
Hyun Young Kim, Junho Jeon, Juliane Hollender, Seungho Yu, Sang Don Kim,