Measurements on suspension water of different natural lake sediments
Conference
·
OSTI ID:37409
- Univ. of Utrecht (Netherlands)
Suspension water of sediment suspensions contains considerable amounts of non-separable parts of the sediment. These parts, often referred to as the third phase, may consist of non-settling particles, dissolved organic materials and various macromolecules. Although the nature and composition of third phase material is unknown, the amount in suspension water and the composition is dependent on the nature of the bulk sediment. In the present study suspension water, originating from three different lake sediments, was analyzed by measuring (1) Dry Weight (DW), (2) Dissolved Organic Carbon (DOC) and (3) the apparent enhanced solubility of three chlorinated benzenes. The latter was measured in a new developed method, in which the chemicals were added to the suspension water by air in an airbridge-system. This method seems to be a suitable method for measuring enhanced solubilities in suspension water of relatively volatile compounds. DW and DOC concentrations and apparent enhanced solubilities vary considerably between the three sediments. However, the results of the three analyses are not in parallel, i.e. enhanced solubilities can not be predicted by the DW or DOC concentration of the suspension water. This means that DW or DOC do not give a good description of the suspension water concerning the sorption behavior of chemicals in suspension water.
- OSTI ID:
- 37409
- Report Number(s):
- CONF-9410273--
- Country of Publication:
- United States
- Language:
- English
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