Adsorption of Reactive Blue 116 Dye and Reactive Yellow 81 Dye from Aqueous Solutions by Multi-Walled Carbon Nanotubes.

摘要: The multi-walled carbon nanotubes obtained by catalytic chemical vapour deposition synthesis are used as a solid matrix for the adsorption of Reactive Blue 116 dye and Yellow 81 from aqueous solutions at different pH values. batch tests carried out allowed us to investigate effects (2, 4, 7, 9 12) contact time (2.5 ÷ 240 min) used. liquid phase was analysed using ultraviolet-visible spectrophotometry in order characterise kinetics, transport mechanisms isotherms. optimal observed 2 12. pseudo-first kinetic model provided best approximation experimental data compared pseudo-second model. predominant mechanism investigated with Weber Morris method molecular diffusion both 116, equilibrium were better adapted Langmuir isothermal maximum capacity occurred values 33.859 mg g−1 32.968 g−1, respectively.