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Equilibrium isotherms of the dyes after adsorption by Bio-SeNPs. Various concentrations of congo red (A); safranine T (C) and methylene blue (E) were removed by 0.2 g/L Bio-SeNPs at 303, 313 and 323 K, respectively. Data are presented as mean ± SD of three replicates. Langmuir, Freundlich and Temkin models of congo red (B); safranine T (D) and methylene blue (F) adsorption onto Bio-SeNPs were fitted using average values at 323 K.
