Reduction of surfactant concentrations in static fish tests compared with biodegradation rates in the OECD screening test |
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Authors: | Peter Gode |
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Affiliation: | Dept.of Ecology, Henkel KGaA, Postfach 1100, 4000 Düsseldorf 1 Germany |
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Abstract: | The loss of chemicals in static fish tests due to biodegradation has been studied with eight model surfactants whose biodegradabilities in the OECD Screening Test range from 0 to 99 % BiAS removal. There was a good correlation between biodegradation in the fish test and in the OECD Screening Test. Only surfactants with a very high BiAS removal of above 93 % were also degraded quickly in the fish test. Surfactants with less than 80 % BiAS removal incurred losses of less than 20 % in the fish test. These results indicate that those substances which are not lost by volatility or adsorption will be maintained to at least 80 % of their nominal concentration during a 96 hour static fish test. |
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