Synthesis of copper oxide nanoparticles on activated carbon for pollutant removal in Tartrazine structure
Activated Carbon was supported with copper oxide nanoparticles, characterized, and used for the removal of anionic tartrazine dye and improve its quality. Adsorption experiments were carried out as batch studies at different contact times, pH, and initial dye concentrations. The dye adsorption equilibrium was rapidly attained after 60 min of contact time and maximum removal percentage took place within 30 mg/L-1 of concentration. This sort of removal of the dye allowing easy separation in the sedimentation stage. The equilibrium data were analyzed by the Langmuir and Freundlich models, which revealed that the Langmuir model was more suitable to describe the azo dye adsorption than the Freundlich one. Kinetics of the adsorption processes was studied using pseudo-first and second-order models and the intra-particle diffusion model. It was found that the kinetics followed a pseudo-second-order equation. Successfully the results show that the removal efficiency was over 98%.
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