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Masitah Hasan
Adsorption of diclofenac sodium using low-cost activated carbon in a fixed-bed column
Removal of naproxen using low-cost Dillenia Indica peels as an activated carbon
2022-12-15
,
Fadirah Fadzail
,
Masitah Hasan
,
Naimah Ibrahim
,
Zulfakar Mokhtar
,
Asih A.Y.P.
,
Syafiuddin A.
In recent years, the presence of pharmaceutical contaminants, such as diclofenac sodium (DCF) in water bodies and their potential influence on aquatic organisms gained much attention. As a result of high demand and usage by consumers, in addition to incomplete removal during wastewater treatment, pharmaceutical contaminants will end up on water surfaces. To mitigate this problem, the elimination of DCF by employing activated carbon derived from Dillenia Indica peels was evaluated. The adsorption of DCF was performed in a continuous process. The findings showed that the adsorption of DCF was favorable at a lower flow rate, greater bed height, and initial DCF concentration, with the highest removal percentage of 44.93%. To assess the characteristics of the breakthrough curve of DCF, the adsorption data were used to match three distinct adsorption models, namely, Boharts and Adam, Yoon-Nelson, and Thomas. The breakthrough results were well-fitted with these models, as the values of R2 for all models and parameters were higher than 0.88. Thus, it was concluded that the activated carbon from Dillenia Indica can effectively remove DCF from an aqueous solution.
2022-01-01
,
Fadirah Fadzail
,
Masitah Hasan
,
Zulfakar Mokhtar
,
Naimah Ibrahim
A batch adsorption process of naproxen (NPX) using activated carbon derived from Dillenia Indica peel was performed at the laboratory scale. NPX was selected as an adsorbate due to its toxicity and large occurrence in water. The study was conducted to examine the ability of prepared activated carbon in adsorbing the NPX. The adsorption was conducted at various initial concentrations of NPX, contact time, adsorbent dosage, and pH. Results of batch adsorption showed that the maximum adsorption was reached at lower pH and adsorbent dosage of 0.4 g. 8 h is needed for the adsorption to reached equilibrium. Langmuir, Freundlich, Dubinin-Radushkevich and Temkin isotherm have been used to analyse the properties of the adsorption process. The data are best suited for the Langmuir and Temkin isotherm and the adsorption follows a pseudo-second order model for kinetic study. The results suggest that the adsorption behave as a monolayer and the process is controlled by chemisorption mechanism. The adsorption capacity of 10.76 mg/g concluded that the activated carbon prepared from Dillenia Indica peel is effective in removing NPX from the water.