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Titel:
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Belang van opgeloste organische stof bij transport van contaminanten uit baggerspecie
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Auteur(s):
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Gepubliceerd door:
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Publicatie datum:
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ECN
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1-10-1998
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ECN publicatienummer:
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Publicatie type:
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ECN-C--98-076
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ECN rapport
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Aantal pagina's:
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Volledige tekst:
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46
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Niet beschikbaar.
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Samenvatting:
Many inorganic and organic contaminants show affinity to dissolvedorganic carbon (DOC) and as a result show a higher mobility bound to DOC than
free. Therefore, it is important to know the speciation of the relevant
components, in particular the organic forms of solutes. Modelling of the
metal speciation in leachates of polluted soil and dredged soil has shown
that Cd, Cu, Pb, and Zn are almost completely bound to DOC at pH>4. In order
to study the mobility of contaminants in dredge soil, highlighting the role
of DOC, a programme has been set up, comprising in-situ field tests,
laboratory experiments and geochemical modelling. The result must consist of
in-situ mobility parameters, in the form of effective diffusion coefficients.
At the same time the speciation of the pollutants in pore water has been
investigated, so that the mobility can be interpreted process-wise and gained
knowledge can be used elsewhere. 11 refs.
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