Assessment of the use of the AVS concept for the routine toxicity monitoring of contaminated freshwater sediments
- Univ. of Ghent (Belgium)
Acid volatile sulfides (AVS) have been shown to be an important factor mediating the bioavailability of heavy metals in sediments and have consequently been suggested as a possible predictive tool for toxicity assessment of these matrices. The potential use and limitations of the AVS method for predictive toxicity screening and priority setting was assessed in a large scale sediment monitoring study (Flanders, Belgium). The acute toxicity of 50 metal contaminated freshwater sediments, with varying metal concentrations and sediment characteristics, were tested using the Microtox{reg_sign} Solid Phase test and the 10 day test with Chironomus riparius and Hyalella azteca. Uni and multivariate statistical techniques were used to asses the relations between acute toxicity and SEM/AVS ratio`s and to evaluate the influence of sediment characteristics on metal bioavailability and toxicity. In general, the results of this study indicate that the AVS-toxicity relationship proposed in literature does have certain limitations. Finally, the potential use of a concentration-addition model for predicting metal-mixture toxicity in sediments will be presented and discussed.
- OSTI ID:
- 392368
- Report Number(s):
- CONF-9511137-; ISBN 1-880611-03-1; TRN: IM9647%%222
- Resource Relation:
- Conference: 2. Society of Environmental Toxicology and Chemistry (SETAC) world conference, Vancouver (Canada), 5-9 Nov 1995; Other Information: PBD: 1995; Related Information: Is Part Of Second SETAC world congress (16. annual meeting): Abstract book. Global environmental protection: Science, politics, and common sense; PB: 378 p.
- Country of Publication:
- United States
- Language:
- English
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