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Removal of Congo Red and Methylene Blue from Aqueous Solutions by Vermicompost-Derived Biochars

Fig 3

Adsorption isotherms for the retention of dyes on biochars.

(a) Langmuir adsorption isotherm for adsorption of CR on biochars; (b) Freundlich adsorption isotherm for adsorption of CR on biochars; (c) Temkin adsorption isotherm for adsorption of CR on biochars; (d) Langmuir adsorption isotherm for adsorption of MB on biochars; (e) Freundlich adsorption isotherm for adsorption of MB on biochars; (f) Temkin adsorption isotherm for adsorption of MB on biochars.

Fig 3

doi: https://doi.org/10.1371/journal.pone.0154562.g003