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The uptake of Manganese-54 by green algae (Protococcoidal chlorella), Daphnia magna,and fathead minnows (Pimephales promelas)
Authors:G. M. Kwasnik  R. J. Vetter  G. J. Atchison
Affiliation:(1) Bionucleonics Department, School of Pharmacy and Pharmacal Sciences, Purdue University, 47907 West Lafayette, Indiana, U.S.A.;(2) Present address: Allied Chemical Company, 83401 Idaho Falls, Idaho, U.S.A.
Abstract:Concentration factors (CF) of 54Mn for three aquatic species: green algae (Protococcoidal chlorella), Daphnia magna, and fathead minnows (Pimephales promelas) were determined following direct exposure to the isotope in solution. The maximum accumulation (CF = 911) in P. chlorella was reached at 48 hours of exposure; the maximum uptake (CF = 65) in Daphnia was reached at 8 hours of exposure; and the maximum accumulation (CF = 22.6) in fathead minnows was at 128 hours of exposure. The data indicate that 54Mn accumulation decreases with ascent up a theoretical aquatic food chain when water is the only source of contamination.
Keywords:Manganese-54  concentration factor  algae  Daphnia  minnows
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