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Title:
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Speciatie van arseen in verontreinigde en gereinigde grond: onderzoek naar mogelijkheden tot verhoging van het reinigingsrendement
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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-C--98-110
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ECN publication
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Number of pages:
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Full text:
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20
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Download PDF
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Abstract:
Arcadis Heidemij Realisatie has been confronted with a residue pollutionof arsenic after cleaning a Swedish soil which was polluted during the
preservation of wood by means of Wolman salts. After separation of
particulates a large part of the arsenic is still present on the remaining
sand grains. By means of electron microscopy it appeared that to a large
extent the pollution probably is associated with iron (hydr)oxide coating on
the sand grains. The aim of the study on the title subject is to investigate,
on the basis of speciation of arsenic in soil, a process-integrated,
extraction procedure to improve the efficiency of the purification. The
method is based on (a) leaching of the polluted soil and purified soil of the
cleaning installation, as a function of the pH, in combination with (b)
specific extraction of soil minerals of which it is expected that they bind
arsenic (amorphous and crystalline iron(hydr)oxide), and (c) geochemical
modelling. 7 refs.
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