界面活性剤の魚への濃縮率と曝露濃度との関係

概要

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To study the relationship between the exposure concentration of surfactants and their concentration factors in fish bodies, carp Cyprinus carpio were exposed to several concentrations of three surfactans: 35S-labelled sodium dodecyl sulfate (35S-C12-AS), 12-AS), 14C-labelled sodium dodecylbenzenesulfonate (14D-n-C12-LAS) and 14C-labelled dodecy1 octa(oxyethylene) ether (14C-C12-AE(8)). For the 35S-C12-AS, the concentration of the 35S-radioactivity in the fish increased gradually with exposure time in each solution. But after 72h of exposure it showed no remarkable changes. Its concentration factors after the equilibrium were 3.9-5.3, and these were not affected by the concentration of each solution. On the other hand, although the concentrations in fish of the 14C-radioactivity derived from the 14C-n-C12-LAS and 14C-C12-AE (8) reached their equilibrium after 72h of exposure, their concentration factors differed according to the concentration of the surfactant in each solution. They ranged from 16 at 9.1 μg/l to 400 at 300μg/l for 14C-n-C12-LAS, and from 39 at 9.9 μg/l to 220 at 1000μg/l for 14C-C12-AE (8). At even higher concentration in 14C-n-C12-LAS solution, however, the concentration factor was apt to be less.
日本水産學會の論文