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|Title:||Bioassays on Illinois Waterway dredged material|
|Authors:||Moore, David W.|
Gibson, Alfreda B.
Dillon, T. M. (Tom M.)
|Keywords:||Dredging spoil--Illinois--Illinois Waterway--Analysis|
Illinois Waterway (Ill.)--Environmental aspects
|Publisher:||Environmental Laboratory (U.S.)|
U.S. Army Engineer Waterways Experiment Station.
|Series/Report no.:||Miscellaneous Paper (U.S. Army Engineer Waterways Experiment Station.) ; EL-92-13|
|Abstract:||Sediment from the Illinois Waterway navigation channel is hydraulically dredged by the US Army Engineer District, Rock Island, and placed in the nearshore environment via pipeline. Water returning to the river can have a high-suspended solids load approaching fluid mud consistency. There is a concern that this return water may exceed the State of Illinois water quality standards for ammonia and have adverse effects on aquatic life. To address these concerns, composite sediment samples and site water collected from selected sites in the Illinois Waterway were evaluated in toxicity tests. Acute (48-hr) toxicity tests were conducted with two species, Pimephales promelas (the fathead minnow) and Daphnia magna (a freshwater cladoceran). A chronic (21-day) toxicity test was also conducted using Daphnia magna. Animals were exposed separately to different concentrations of filtered and unfiltered elutriates prepared from Illinois Waterway dredged material. Total ammonia concentrations were measured in all tests and the un-ionized fraction was calculated by adjusting for temperature and pH. Tests were conducted at the US Army Engineer Waterways Experiment Station, Vicksburg, MS. In addition, as part of an interlaboratory effort, a 48-hr acute toxicity test with Pimephales pomelas fry was conducted concurrently by the Hygienic Laboratory of the University of Iowa, Des Moines, IA.|
|Gov't Doc #:||Miscellaneous Paper EL-92-13|
|Rights:||Approved for Public Release; Distribution is Unlimited|
|Appears in Collections:||Miscellaneous Paper|