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Title:
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Harmonization of leaching/extraction tests and leaching of organic contaminants
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Author(s):
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Published by:
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Publication date:
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ECN
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1-12-1998
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ECN report number:
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Document type:
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ECN-RX--98-068
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Other
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Number of pages:
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Full text:
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11
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Download PDF
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Abstract:
In the framework of the Standards, Measurement and Testing Programme(DGXII) of the European Community, a Network for the Harmonization of
Leaching/Extraction Tests has been initiated in 1995. The direct results from
this activity are a book on 'Harmonization of Leaching/Extraction Tests'
published in 1997 (Elsevier), the project 'Technical Work in Support of the
Network' (SMT4-CT96-2066) and the project 'Leaching of Organic contaminants'
(SMT4-CT97-2160). In the framework of the Network 'Technical work in support
of the Network of Harmonization of Leaching/Extraction Tests', sample of
soil, contaminated soil, compost, sewage sludge, sediments, wastes,
stabilized wastes, construction materials (concrete, drinking water pipes,
bricks, asphalt), aggregates (demolition debris, MSWI bottom ash) and
impregnated wood have been subjected to various leaching tests and the
extracts have been analysed. The data processing (>25000 data points) is in
full progress and is already leading to interesting conclusions on the
comparability between tests and consistent behaviour of elements between the
different materials resulting in cross-fertilization of experiences in
different fields. In the context of the project 'Leaching of Organic
contaminants', the main emphasis so far has been on the performance of the
analytical methods for measuring PAHs in extracts obtained after leaching and
on determining the role of Dissolved Organic Carbon (DOC) in the leachability
of organic contaminants from contaminated soils and sediments. For the higher
PAHs, the common factor DOC appears to be a key parameter driving release
from soil sediments.
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