Effects of quantity, quality and contact time of dissolved organic matter on bioconcentration of benzo(a)pyrene in the nematode Caenorbabditis elegans

The effect of natural aquatic dissolved organic matter (DOM) on the bioaccumulation of benzo(a)pyrene (B(a)P) in Caenorbabditis elegans is reported. The quantity, quality and contact time of DOM with B(a)P was investigated. Increasing levels of DOM decreased the bioconcentration of B(a)P in C. elega...

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Bibliographic Details
Published in:Environmental toxicology and chemistry 1999-01, Vol.18 (3), p.459-465
Main Authors: Haitzer, M, Burnison, B K, Hoss, S, Traunspurger, W, Steinberg, CEW
Format: Article
Language:English
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Summary:The effect of natural aquatic dissolved organic matter (DOM) on the bioaccumulation of benzo(a)pyrene (B(a)P) in Caenorbabditis elegans is reported. The quantity, quality and contact time of DOM with B(a)P was investigated. Increasing levels of DOM decreased the bioconcentration of B(a)P in C. elegans. A decrease in the bioconcentration factor (BCF) was more pronounced for low concentrations of DOM, resulting in a non-linear relationship which could be quantitatively described in a nonlinear regression procedure. Mean correlation coefficients indicated that 70-93 per cent of the variation in BCF could be explained from the control BCF and the concentration of DOM. The ability to reduce the BCF of B(a)P depended on the origin (quality) of DOM. Marsh DOM was most efficient in reducing the BCF of B(a)P, with swamp DOM having an intermediate effect and pond DOM the least effective. Contact time of DOM to B(a)P had no significant influence for marsh and swamp DOM but was influenced by pond DOM. There are 51 references.
ISSN:0730-7268