Wik,A., Lycken,J. and Dave,G.(2008): Sediment quality assessment of road runoff detention systems in Sweden and the potential contribution of tire wear. Water Air Soil Pollut., 194, 301-314.

『スウェーデンの道路雨水阻止システムにおける堆積物の質の評価およびタイヤ・ウェアから考えられるその寄与』

『Abstract
　Sediments from 18 different road runoff detention systems, located on the Swedish West Coast, were assessed for their ecological hazard potential. Thirteen of the sites were detention ponds, three were manholes within the same sedimentation construction, and two were detention basins handling wash water from road tunnels. Sediments from all sites were analysed for a range of physico-chemical parameters and contaminants, and screened for acute toxicity using Hyalela azteca (sediment), Daphnia magna (elutriate), and Ceriodaphnia dubia (elutriate) as the test organisms, and for chronic toxicity using C.dubia as the test organism. The benthic fauna of the thirteen detention ponds was also studied. Sediment quality for one or several contaminants at half of the sites, and one third revealed toxicity in some of the bioassays. Most of the detention ponds were dominated by tolerant taxa indicating low biological quality. Relationships between contaminant concentrations, toxicity in bioassays, and benthic fauna were, however, found to be weak. Extractable organic Zn, which was used as a tire wear marker, correlated with Zn, Cu, presumably from brake linings, and W, a common component of tire studs. The highest concentration, which was found in the manholes (14 mg kg-1 ds), corresponds to a tire wear concentration of 11 g kg-1 ds. The results of the present study have shown that traffic related contaminants accumulate in the studied runoff treatment systems, and, therefore, the maintenance of them is crucial in order to prevent contamination of surrounding waters.

Keywords: Benthic fauna; Detention pond; Road runoff; Sediment quality; Tire wear; Toxicity』

1. Introduction
2. Materials and methods
　2.1. Site descriptions and sampling procedures
　2.2. Chemical analyses
　2.3. Bioassays
　　2.3.1. Tests with H.azteca
　　2.3.2. Acute tests with D.magna and C.dubia
　　2.3.3. Toxicity identification evaluations
　　2.3.4. Chronic tests with C.dubia
　2.4. Benthic fauna
　2.5. Statistical analyses
3. Results
　3.1. Sediment chemistry
　3.2. Bioassays
　3.3. Benthic fauna
　3.4. Correlations among contaminant concentrations and biological endpoints
4. Discussion
5. Conclusions
Acknowledgements
References

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