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Title:
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Uitlooggedrag van organische verontreinigingen uit bouwmaterialen en afvalstoffen
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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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1998
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ECN report number:
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Document type:
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ECN-C--98-019
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ECN publication
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Number of pages:
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Full text:
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64
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Download PDF
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Abstract:
Within the framework of the activities of the Dutch StandardizationCommittee 390011 on 'Leaching Behaviour of Construction Materials and Waste
Materials' methods have been developed for leaching of organic contaminants.
In the development phase the methods developed for inorganic constituents
have been used as the basis. The specific properties and mechanisms of
release of organic micropollutants have not been addressed sufficiently. In
this study leaching experiments on a wide variety of materials have been
evaluated on the basis of micropollutant solubility and interaction with the
solid phase and dissolved organic matter. The latter property has never been
measured in extracts from leaching tests. From this evaluation it can be
concluded that water soluble organic micropollutants (e.g. light PAHs,
phenols, low molecular fatty acids) can be tested with the existing
procedures without too many problems. For organic micropollutants with a very
low water solubility, the role of DOC (dissolved organic carbon) has not been
taken into account sufficiently. The degree of DOC mobilization is more
crucial in many situations than the analysis of individual organic
micropollutants. For an evaluation of release to soil the chemical form is
important as facilitated transport of micropollutants may lead to
contamination at much larger distances than considered possible on the basis
of individual material properties. Further work to clarify the role of DOC in
leaching is recommended. 44 refs.
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