Toxicity and Fate of Nickel-Coated Graphite in a Marine Environment.
Final rept. Jun-Dec 94,
EDGEWOOD RESEARCH DEVELOPMENT AND ENGINEERING CENTER ABERDEEN PROVING GROUND MD
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The toxicity of nickel-coated graphite fibers was examined using the marine amphipod Ampellsca abdita. Fibers were mixed into the top 1 cm of sediment at concentration from 10 to 50 mgL. The 10-day EC50 to amphipods was 40 mgL. Fate studies 21 days were conducted in salt water with and without sediment. Fate studies were also conducted with the fibers ground to powder. Ground fibers allowed a higher concentration of nickel to dissolve into the water column. However, when mixed into sediment, the concentration of dissolved nickel is significantly less.
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