Research Article
Melanin-Based Coatings as Lead-Binding Agents
Table 3
Binding parameters of synthetic-eumelanin-coated discs with different metal ions.
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aTitrations in 50 mM NaNO3, initial pH 4.75, binding isotherms are shown in Figures 2(c) and 3. Values calculated from linearized Langmuir isotherms () from at least three independent titrations with different discs; standard deviations shown. bFor each metal ion, the highest observed percentage bound at equilibrium is listed, with the initial concentration where this occurs shown in parentheses. cValues for Pb2+ are repeated from Tables 1 and 2. |