SORPTION POTENTIALS OF MELON PEELS IN THE REMOVAL OF ULTRAMARINE RED (DYE) FROM AQUEOUS SOLUTION

A.K. ASIAGWU
2020 Nigerian Journal of Pure and Applied Sciences  
This work was conducted in line with the efforts to remove coloured materials from waste water using non – conventional techniques. Therefore, this study investigated the effectiveness and efficiency of melon (Cucumeropsis mannii) peels in the removal of ultramarine red, from aqueous solution. The dependence of sorption parameters (contact time, dosage, temperature and pH) on dye removal were examined. Results obtained revealed that increase in the contact time between 20-100 minutes increased
more » ... minutes increased the dye adsorption. The maximum percentage of ultramarine red dye removed was obtained at 100 minutes. However, increase in dye concentration from 10 – 50mg/L, resulted to an increase in sorption capacity (0437-1.062mg/g). The pH increase resulted to increase in ultramarine red adsorption. Meanwhile ultramarine red adsorption was also observed to increase from 0.054-0.079mg/g, while the temperature was varied between 30o-70oC. The data generated were further fitted to both Langmuir and Freunlich Isotherms. The separation factor (SF) from Langmuir was 0.48. While the coefficient of determination from Freundlich (R2) was 0.976, indicating that both models were favourable to the adsorption process. Pseudo-second order kinetics produced a better description of the adsorption process than the pseudoThis work was conducted in line with the efforts to remove coloured materials from waste water using non – conventional techniques. Therefore, this study investigated the effectiveness and efficiency of melon (Cucumeropsis mannii) peels in the removal of ultramarine red, from aqueous solution. The dependence of sorption parameters (contact time, dosage, temperature and pH) on dye removal were examined. Results obtained revealed that increase in the contact time between 20-100 minutes increased the dye adsorption. The maximum percentage of ultramarine red dye removed was obtained at 100 minutes. However, increase in dye concentration from 10 – 50mg/L, resulted to an increase in sorption capacity (0437-1.062mg/g). The pH increase resulted to increase in ultramarine red adsorption. Meanwhile ultramarine red adsorption was also observed to increase from 0.054-0.079mg/g, while the temperature was varied between 30o-70oC. The data generated were further fitted to both Langmuir and Freunlich Isotherms. The separation factor (SF) from Langmuir was 0.48. While the coefficient of determination from Freundlich (R2) was 0.976, indicating that both models were favourable to the adsorption process. Pseudo-second order kinetics produced a better description of the adsorption process than the pseudo-first order kinetics. The melon peel is a good adsorbent for the sorption of ultramarine red in aqueous solution.
doi:10.48198/njpas/20.a05 fatcat:wfzpixmdz5ak3evglafppba2jm