Locatiespecifieke ecologische risicobeoordeling. \nPraktijkonderzoek met de TRIADE-benadering: deel 3
Year: 2007
Type: report
Abstract: The TRIAD approach was tested for its applicability in assessing actual ecological risks on five sites around the zinc factory near the city of Budel, in The Netherlands. The TRIAD method offers the possibility of a tiered approach to actual risks for the local ecosystem. Risk assessment is derived on the basis of three elements, i.e. chemistry, toxicology and ecology. It is meant as an improvement for the present remediation urgency systematics. Three of the five sites were contaminated with zinc and cadmium at different levels, that did not exceed the Dutch 'intervention values'. Besides total soil contents, mobile soil metal fractions and pore-water concentrations were measured during the chemical assessment. Several variants of the toxic pressure calculations were compared. In the toxicological assessment several bioassays were performed, which showed different sensitivities to heavy metals and influence of soil-pH and nutrients. There are still very few tests that can be used for acid sandy field soil. Many soil biological analyses (microbial and soil fauna groups) and a vegetation inventory were used for the ecological assessment. In this field study they showed a larger deviation from the reference site than the chemical and toxicological indicators. From the overall TRIAD assessment it can be concluded, among others, that selection of a non-contaminated reference site is both crucial as well as difficult. Polluted sites generally differ in more aspects from a local reference site than just in the concentration of contaminants. Although the TRIAD approach is relatively time consuming, uniformity and the scientific basis of the actual ecological assessment have improved considerably. Therefore the TRIAD approach is recommended for the future as a standard tool to assess actual ecological risks of contaminated soil.
Authors: Schouten AJ, Dirven van Breemen EM, Bogte JJ, Rutgers M, Baerselman R, Bloem J, Didden WAM, Dimmers W, Groot A de, Keidel H, Mulder Ch, Peijnenburg W, Siepel H, Wouterse M, Schouten AJ, Dirven-van Breemen EM, Bogte JJ, Rutgers M, LER, Alterra, WUR/Bodemkwaliteit, Bedrijfslaboratorium voor Grond en Gewasonderzoek (Blgg)
Language: English
Topic: Heavy metals in environment
Subfield: Pollution
Field: Environmental Science
Domain: Physical Sciences
SDG: Life on land
Open Access status: green
OpenAlex ID: W7209344328
Cites:
Cited by:
Related to: