Acid Volatile Sulfide (AVS) as instrument in the risk assessment of sediments
Acid Volatile Sulfide (AVS) als instrument bij de risicobeoordeling van waterbodems
26 May 2012, PDF |
38 pages |
van den Hoop MAGT, Peijnenburg WJGM, Sijm DTHM, van den Berg GA, van der Heijdt LM, Zwolsman JJG
RIVM Report 607220003
Risk assessment of sediments is primarily based on the determination of total content of polluted components. Analysis of sediment composition in the Netherlands, both at present and expected in the future, shows that heavy metals, especially Zn, Cu and Ni, appear to be the main compounds determining the pollution status of contaminated sediments. The mobility of these elements is strongly reduced in the presence of an excess of sulfide (AVS). The geochemical behaviour of heavy metals in sulfide-rich sediments and the relation with ecotoxicological data, provide the basis for the AVS concept presented in this report. Although there are some further limitations attached to its exploration, the AVS concept would seem, at present, to be an effective instrument for determining the cleaning order of polluted sediments, especially in view of the fairly simple procedures to be implemented.