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The Impact of Carbon Surface Composition on the Diffusion and Adsorption of Paracetamol at Different Temperatures and at Neutral pH

✍ Scribed by Artur P. Terzyk

Publisher
Elsevier Science
Year
2000
Tongue
English
Weight
65 KB
Volume
230
Category
Article
ISSN
0021-9797

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✦ Synopsis

Commercial activated carbon D43/1 (Carbo-Tech, Essen, Germany) was deashed and modified chemically to increase surface acidity and basicity, as well as to introduce metal cations onto the surface and yet conserve the porosity. The five carbons obtained were applied as adsorbents. Based on the results of batch-reactor test kinetic measurements of the adsorption of 4-hydroxyacetanilide (paracetamol) from aqueous solution at the neutral pH and at three temperatures (300, 310, and 320 K), the values of the effective diffusion coefficient (D e ) were calculated. It is shown that D e increases (up to the relative adsorption equal to ∼0.6) with rise in the magnitude of the enthalpy of immersion of carbons in water. Based on the obtained results as well as those published previously, the role of surface composition in the mechanism of paracetamol adsorption and in the kinetics of this process is discussed.

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