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A vacuum-operated pore-water extractor for estuarine and freshwater sediments

Archives of Environmental Contamination and Toxicology

By:
,

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Abstract

A vacuum-operated pore-water extractor for estuarine and freshwater sediments was developed and constructed from a fused-glass air stone attached with aquarium airline tubing to a 30 or 60 cc polypropylene syringe. Pore water is extracted by inserting the air stone into the sediment and creating a vacuum by retracting and bracing the syringe plunger. A hand-operated vacuum pump attached to a filtration flask was also evaluated as an alternative vacuum source. The volume and time to extract pore water varies with the number of devices and the sediment particle size. Extraction time is longer for fine sediments than for sandy sediments. Four liters of sediment generally yield between 500 and 1,500 mL of pore water. The sediment that surrounds and accumulates on the air stone acts as a filter, and, except for the first few milliliters, the collected pore water is clear. Because there is no exposure to air or avenue for escape, volatile compounds andin situ characteristics are retained in the extracted pore water.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
A vacuum-operated pore-water extractor for estuarine and freshwater sediments
Series title:
Archives of Environmental Contamination and Toxicology
Volume
21
Issue:
2
Year Published:
1991
Language:
English
Contributing office(s):
Patuxent Wildlife Research Center
Description:
321-324
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
First page:
321
Last page:
324
Number of Pages:
4