Uptake pathways and elimination of a nonionic surfactant in cod ( Gadus morrhua L.)

Abstract

The uptake and elimination of a labelled surfactant, the nonionic nonylphenol ethoxylate, was studied in cod ( Gadus morrhua L.) exposed to a concentration of 5 ppm. The amount of labelled surfactant was analyzed by the scintillation counting method in various tissues from the fish. A penetration especially through the gills, but also some intestinal resorption was found. Eight hours from start a steady state condition was obtained. High concentrations were found especially in gall bladder and liver. The elimination process in clean sea water was quite rapid and after 24 h the residues