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a) Adsorbed amounts of lysine using commercial activated carbons with the corresponding surface areas. T=30 °C, c Lys=30 g L−1, t ads=24 h, pH 10. The error bars correspond to the standard deviation determined from triplicate experiments. b) Adsorption isotherm of lysine from aqueous solution fitted to a Langmuir adsorption isotherm model.
