Copper-Doped Zinc Oxide Nanoparticles: Synthesis, Characterization, and Application for Adsorptive Removal of Toxic Azo Dye

Figure 4

Kinetics, isotherms, and thermodynamics of adsorption of CR dye by Cu/ZnONPs: (a) pseudo-first-order kinetics; (b) pseudo-second-order kinetics; (c) Langmuir isotherm model; (d) Freundlich isotherm model; (e) thermodynamics.

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