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Journal of Emerging Trends in Engineering and Applied Sciences (JETEAS)

ISSN:2141-7016

Article Title: A Thermodynamic and Kinetic Study on Diclofenac Adsorption Using Agricultural Metallic Based Nanoparticles
by Chima B. Njokua, Chinedu T. Okekeb, Titus A. M. Msagatia

Abstract:
Pharmaceutical drugs are frequently found worldwide in different environmental compartments. In South Africa, pharmaceuticals, particularly nonsteroidal anti-inflammatory drugs, are being detected in aquatic environments. Barium/Bentonite/Eggshell (BBE) and Bentonite/Eggshell (BE) samples were synthesized to meet the need for better chemical preparation techniques for selective diclofenac extraction from aqueous environment samples. Adsorption studies in batches of the samples revealed a Langmuir isotherm and pseudo second-order chemisorption, resulting in creating a monolayer on the surface. According to this experiment, the absorbents had an adsorption capacity of 5.975 mg g-1for BBE and 7.0072mg g-1for BE with the Langmuir isotherm model at 298 K. After solid-phase extraction, the nanocomposites were utilised as a selectivity sorbent for determining the proportion of diclofenac in water by UV/Vis analysis. Pseudo-second order model was the best to describe the data and reflected a value of 0.999. Effective desorption of diclofenac from the loaded adsorbents was achieved by utilising either acetone or ethanol through a desorption efficiency in the range of 90–94 %.
Keywords: Langmuir Isotherm; Chemisorption; Monolayer; Selectivity; Sorbent
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