Fig. 4 | Scientific Reports

Fig. 4

From: Eco-friendly zinc-chitosan/poly(l-lactic acid)/polyurethane nanocomposites for dye removal and antimicrobial wastewater treatment

Fig. 4

Isotherm models and chitosan content effects for Acid Blue 25 adsorption on ZnCS/PLA/PU nanocomposites at [dye] = 10⁻⁴ M, T = 298 K, m = 0.1 g, pH 2.0. (A ) Langmuir isotherm model plot of Ce/qe vs. Ce, illustrating maximum adsorption capacity (qm) and equilibrium constant (Ke); (B) Freundlich isotherm model plot of lnqe vs. log Ce, showing adsorption intensity (1/n) and constant (Kf); (C) Chitosan content versus dye adsorption capacity (qe), highlighting the influence of ZnCS-to-PU ratio on adsorption performance across ZCPP41, ZCPP11, and ZCPP14 NCs.

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