Accumulation and release of Pb(II) in aqueous solution by aquatic mosses (Fontinalis antipyretica)
by Ramiro J.E. Martins; Olga M.M. Freitas; Vítor J.P. Vilar; Rui A.R. Boaventura
International Journal of Environment and Waste Management (IJEWM), Vol. 9, No. 3/4, 2012

Abstract: The uptake and release of Pb(II) by Fontinalis antipyretica was studied in laboratory, by exposing the plants to different lead concentrations for 144 h and 335 h contamination and decontamination periods, respectively. A first order kinetic model was fitted to the experimental data to determine the uptake and release constants, k₁ and k₂, and other relevant parameters. The metal accumulation capacity, at equilibrium, follows the order: Pb(II) > Zn(II) > Cd(II) > Cr(VI). A Bioconcentration Factor (BCF) and a Biological Elimination Factor (BEF) were also determined; for 0.9-2.2 mg Pb l⁻¹, BCF decreases from about 30748 to 21296.

Online publication date: Sat, 13-Dec-2014

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