Sediment testing intermittent renewal system for the automated renewal of overlying water in toxicity tests with contaminated sediments

Technical Report · Fri Jan 01 00:00:00 EST 1993

OSTI ID:5941853

Benoit, D A; Phipps, G L; Ankley, G T

A sediment testing intermittent renewal (STIR) system (stationary or portable) for invertebrate toxicity testing with contaminated sediments has been successfully developed and thoroughly tested at ERL-Duluth. Both the stationary and portable systems enable the maintenance of acceptable water quality (e.g. DO) through the capability of automatically renewing overlying water in sediment tests at rates ranging from 1 to 21 volume renewals/day. The STIR system not only significantly reduces the labor associated with renewal of overlying water but also affords a gentle exchange of water that results in virtually no sediment resuspension. Both systems can also be installed in a compact vented enclosure to permit safe testing of hazardous contaminated sediments. To date the STIR system has been used extensively for conducting 10-day bulk sediment tests with Chironomus tentans, Hyalella azteca and Lumbriculus variegatus.

• Research Organization: Environmental Protection Agency, Duluth, MN (United States). Environmental Research Lab.
• OSTI ID: 5941853
• Report Number(s): PB-93-222362/XAB; EPA-600/J-93/278
• Resource Relation: Other Information: Pub. in Water Research, Vol. 27, No. 9, 1403-1412(May 1993). See also PB--92-137488
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
SEDIMENTS
TESTING
TOXICITY
AUTOMATION
BACTERIA
CONTAMINATION
EQUIPMENT
IMAGES
INVERTEBRATES
LABOR
MAINTENANCE
PORTABLE EQUIPMENT
SAFETY
WATER POLLUTION
WATER QUALITY
ANIMALS
ENVIRONMENTAL QUALITY
MICROORGANISMS
POLLUTION
540320* - Environment
Aquatic- Chemicals Monitoring & Transport- (1990-)
560300 - Chemicals Metabolism & Toxicology