Abstract
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 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.
Highlights
Most coloured substances like dyes and pigments light penetration and reduces several are of synthetic background and are made up of processes of photosynthesis (Arslanogwu et al, very complex aromatic molecular structure that 2005). make them very stable and difficult to biodegrade
The response of time on adsorption was in order to obtain how long the melon peel waste biomass would take to absorb the ultramarine red
The data from the time-dependent experiment for the sorption of ultramarine red by the melon peel waste is shown in the fig
Summary
Most coloured substances like dyes and pigments light penetration and reduces several are of synthetic background and are made up of processes of photosynthesis (Arslanogwu et al, very complex aromatic molecular structure that 2005). make them very stable and difficult to biodegrade. It is important to remove these coloured Coloured materials are used in industries such as substances from the wastewater before they are papers, plastic, food, textiles leather, cosmetics and discharged by industries (Azliar et al, 2005). The wide use of these substances often poses Urgent attention is required so as to safeguard the pollution challenge because of coloured environment and public health (Asiagwu et al, wastewater discharge into our water systems 2017 and Carliel, 1996). In line with the foregoing, (Arami et al, 2005). This coloured wastewater a number of conventional techniques have been does affect aesthetic value but reduces developed for the decontamination of these
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