Abstract
ADSORPTION KINETICS FOR REMOVAL OF METHYL ORANGE DYE USING SYNTHESIZED ZnO NANOPARTICLES
Lucy J. Chebor* and Faith Chebii
ABSTRACT
Nano-sized crystals of zinc oxide (ZnO) were synthesized, with a size of 26 nm. The products have been subjected to thorough characterization with Fourier Transform Infra Red spectroscopic techniques as well as X-ray diffraction analysis. These investigations confirm the formation of zinc oxide nanoparticles. The nano-particles showed remarkable adsorption efficiency in removal of methylorange dye. For the evaluating the adsorption kinetics of methyl orange on ZnO nanoparticles, the data was treated with Lagergren first order model. Thusthis studyaimed at assessing the nature of adsorption kinetics resulting from photo degradation of methylorange dye using ZnO nanoparticles. Precipitation technique was used to synthesize ZnO nanoparticles. The values obtained for Lagergren second order plot of methyl orange adsorption under sunlight and fluorescent conditions were higher than those of Lagergren first order. This suggests that the process followed the pseudo second order kinetics. Future studies should focus on the nature of adsorption isotherms in case where stabilizers are used to enhance the efficiency of nanoZnO in the removal of dyes from water waters.
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