Papers by Adekoya Oluwafemi
Drafts by Adekoya Oluwafemi
Removal of Organic pollutant from stimulated wastewater using tri-composite adsorbents, 2021
This frightening and life-threatening situation has been brought about by the prevalence of organ... more This frightening and life-threatening situation has been brought about by the prevalence of organic contaminants in our environment, most notably polycyclic aromatic hydrocarbons (PAHs) and dyes. When people breathe in pollutants from the environment, such as polycyclic aromatic hydrocarbons (PAHs) (such as anthracene), nitrophenol, and malachite green, it can cause irritation of the eyes, skin, or lungs; anthracene has been linked to the development of cataracts and damage or irritation of the eyelids. Organic pollutants may be absorbed by ingestion and skin absorption. This affects organs including the liver, kidney and blood as well as the central nervous system.
Furthermore, to remedy the pollution caused by organic pollutants, biogenic wastes such as eggshells, periwinkle shells, and snail shells were considered in this study. They can be used as adsorbents for pollutants, but if they are not properly handled and disposed of, they can have negative environmental effects such as breeding mosquitoes, causing an unpleasant odour, and causing basic injury while moving on the floor with these shells.
To treat wastewater pollution (pollutants removal), adsorption was preferred in this project. Wastewater was manufactured using a known quantity of anthracene, nitrophenol and malachite green dissolved in an organic solvent (ethanol), which was then contacted and examined under different circumstances.
The Eggshell, periwinkle shell and snail shell were gotten, crushed and processed, although, the snail shell was wet-sieved, dried and dry-sieved to fine particles while the eggshell and periwinkle shell were only dry-sieved then a known amount of the materials were weighed respectively before activation with 0.1 M of Phosphoric acid, bleached with hydrogen peroxide and neutralized with 0.3 M sodium hydroxide. Before storing, the materials were further dried in the oven and in the sun. To determine the maximum adsorption capacity, Design Expert was utilized as software in conjunction with an Excel spreadsheet. Prior to conducting adsorption research in which relevant isotherms, kinetics and mass transfer models were explored in order to determine the best run.
Nevertheless, the Hill-DeBoer isotherm model has the highest mean R2 value of 0.9900, which includes 0.9981 for anthracene, 0.9876 for nitrophenol, and 0.9891 for neutral-red, among others. For different kinetic models investigated, Pseudo second order shows the most suitable fitting parameters which are 1 (unity) at a concentration of 85mg/l for anthracene, 1 (unity) at a concentration of 85mg/l for nitrophenol and 1 (unity) at 85mg/l concentration for neutral-red. The Dumwald –Wagner, Vermeulin’s and Film Transfer diffusion model shows the most suitable and best-fitting parameters which are 0.9944 at a concentration of 55mg/l for anthracene, 0.9775 at a concentration of 85mg/l for nitrophenol, and 0.9904 at 40mg/l concentration for neutral-red.
Lastly, adsorption capacity and removal efficiency improve with increasing concentration, contact duration, and starting pollutant concentration, respectively. Hill-DeBoer Isotherm was used to fit the equilibrium data, and the calculated parameters of the various kinetics models and validation results were also reported. A pseudo-second-order kinetic model is suggested to be the best model for describing anthracene, nitrophenol, and neutral-red uptake onto eggshell, periwinkle shell, and snail shell adsorbent.
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Papers by Adekoya Oluwafemi
Drafts by Adekoya Oluwafemi
Furthermore, to remedy the pollution caused by organic pollutants, biogenic wastes such as eggshells, periwinkle shells, and snail shells were considered in this study. They can be used as adsorbents for pollutants, but if they are not properly handled and disposed of, they can have negative environmental effects such as breeding mosquitoes, causing an unpleasant odour, and causing basic injury while moving on the floor with these shells.
To treat wastewater pollution (pollutants removal), adsorption was preferred in this project. Wastewater was manufactured using a known quantity of anthracene, nitrophenol and malachite green dissolved in an organic solvent (ethanol), which was then contacted and examined under different circumstances.
The Eggshell, periwinkle shell and snail shell were gotten, crushed and processed, although, the snail shell was wet-sieved, dried and dry-sieved to fine particles while the eggshell and periwinkle shell were only dry-sieved then a known amount of the materials were weighed respectively before activation with 0.1 M of Phosphoric acid, bleached with hydrogen peroxide and neutralized with 0.3 M sodium hydroxide. Before storing, the materials were further dried in the oven and in the sun. To determine the maximum adsorption capacity, Design Expert was utilized as software in conjunction with an Excel spreadsheet. Prior to conducting adsorption research in which relevant isotherms, kinetics and mass transfer models were explored in order to determine the best run.
Nevertheless, the Hill-DeBoer isotherm model has the highest mean R2 value of 0.9900, which includes 0.9981 for anthracene, 0.9876 for nitrophenol, and 0.9891 for neutral-red, among others. For different kinetic models investigated, Pseudo second order shows the most suitable fitting parameters which are 1 (unity) at a concentration of 85mg/l for anthracene, 1 (unity) at a concentration of 85mg/l for nitrophenol and 1 (unity) at 85mg/l concentration for neutral-red. The Dumwald –Wagner, Vermeulin’s and Film Transfer diffusion model shows the most suitable and best-fitting parameters which are 0.9944 at a concentration of 55mg/l for anthracene, 0.9775 at a concentration of 85mg/l for nitrophenol, and 0.9904 at 40mg/l concentration for neutral-red.
Lastly, adsorption capacity and removal efficiency improve with increasing concentration, contact duration, and starting pollutant concentration, respectively. Hill-DeBoer Isotherm was used to fit the equilibrium data, and the calculated parameters of the various kinetics models and validation results were also reported. A pseudo-second-order kinetic model is suggested to be the best model for describing anthracene, nitrophenol, and neutral-red uptake onto eggshell, periwinkle shell, and snail shell adsorbent.
Furthermore, to remedy the pollution caused by organic pollutants, biogenic wastes such as eggshells, periwinkle shells, and snail shells were considered in this study. They can be used as adsorbents for pollutants, but if they are not properly handled and disposed of, they can have negative environmental effects such as breeding mosquitoes, causing an unpleasant odour, and causing basic injury while moving on the floor with these shells.
To treat wastewater pollution (pollutants removal), adsorption was preferred in this project. Wastewater was manufactured using a known quantity of anthracene, nitrophenol and malachite green dissolved in an organic solvent (ethanol), which was then contacted and examined under different circumstances.
The Eggshell, periwinkle shell and snail shell were gotten, crushed and processed, although, the snail shell was wet-sieved, dried and dry-sieved to fine particles while the eggshell and periwinkle shell were only dry-sieved then a known amount of the materials were weighed respectively before activation with 0.1 M of Phosphoric acid, bleached with hydrogen peroxide and neutralized with 0.3 M sodium hydroxide. Before storing, the materials were further dried in the oven and in the sun. To determine the maximum adsorption capacity, Design Expert was utilized as software in conjunction with an Excel spreadsheet. Prior to conducting adsorption research in which relevant isotherms, kinetics and mass transfer models were explored in order to determine the best run.
Nevertheless, the Hill-DeBoer isotherm model has the highest mean R2 value of 0.9900, which includes 0.9981 for anthracene, 0.9876 for nitrophenol, and 0.9891 for neutral-red, among others. For different kinetic models investigated, Pseudo second order shows the most suitable fitting parameters which are 1 (unity) at a concentration of 85mg/l for anthracene, 1 (unity) at a concentration of 85mg/l for nitrophenol and 1 (unity) at 85mg/l concentration for neutral-red. The Dumwald –Wagner, Vermeulin’s and Film Transfer diffusion model shows the most suitable and best-fitting parameters which are 0.9944 at a concentration of 55mg/l for anthracene, 0.9775 at a concentration of 85mg/l for nitrophenol, and 0.9904 at 40mg/l concentration for neutral-red.
Lastly, adsorption capacity and removal efficiency improve with increasing concentration, contact duration, and starting pollutant concentration, respectively. Hill-DeBoer Isotherm was used to fit the equilibrium data, and the calculated parameters of the various kinetics models and validation results were also reported. A pseudo-second-order kinetic model is suggested to be the best model for describing anthracene, nitrophenol, and neutral-red uptake onto eggshell, periwinkle shell, and snail shell adsorbent.