PROBLEMS IN THE STUDY OF EMBEDDED HAZARDOUS WASTES
H. FARKAS, A. BITTÓ, A. HORVÁTH
József Fodor National Center for Public Health
National Institute of Environmental Health, Budapest, Hungary
Corresponding author: Hilda Farkas, M.D.
József Fodor National Center for Public Health
National Institute of Environmental Health
H-1966 Budapest, P. O. Box 64, Hungary
Tel.: (+36) 1215-2250
Fax: (+36) 1215-0148
CEJOEM 1999, Vol.5. No.1.:54-65
ABSTRACT: The authors established that the present Hungarian standard
is not suitable for modelling the environmental leaching processes, because
it does not prescribe a pH control required for the equilibrium tests,
or does not use repeated of acidified/ buffered leachant for the dynamic
test of monolithic products. In addition, the patent does not contain methods
for testing non-monolithic, granulated or lumpy embedded wastes.
The authors have suggested some possible leaching
methods of embedded wastes. In monolithic forms it should be performed
an equilibrium test in demineralised water (pH = 7) and in buffered (pH
= 4.5) ammonium acetate solution beside pH control. Whereas the test of
granulated and lumpy embedded wastes is suggested to be performed from
the extracts prescribed for the present Hungarian standard of hazardous
wastes taking into account for particle size and extraction time. These
methods should be standardised considering the results of the experiments.
KEY WORDS: Equilibrium tests, acidified/ buffered leachant, dynamic
test, granulated and lumpy embedded wastes
Received: 28 January 1998
Accepted: 26 January 1999
Posted: December 1999 |
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