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|Title: ||Characterisation of surface ionisation and adsorption of phenol and 4-nitrophenol on non-porous carbon blacks|
|Authors: ||Carrott, Peter|
Valente Nabais, Joao
|Issue Date: ||2008|
|Publisher: ||Adsorption Science and Technology|
|Citation: ||Adsorption Science and Technology 26 (10) (2008) 827-841.|
|Abstract: ||The adsorption of phenol and 4-nitrophenol from aqueous
solutions by carbon blacks was studied. Particular attention was paid to the
characterisation of the surface chemistry and ionisation of the carbon blacks by
use of a simple carbon surface ionisation model, as well as the use of a
normalised form of the Freundlich equation for the analysis of the adsorption
isotherms. The results indicated that the solutes interact directly with the
graphene layers and that the adsorption is sensitive to the π-electron density.
Phenol has a weaker interaction and is more sensitive to the system conditions.
In particular, it is more sensitive to oligomerisation under certain conditions.
Comparison of the results with those previously reported for activated carbons
with similar points of zero charge prepared from cork confirms the existence of
a significant micropore-narrowing effect in the adsorption of organic solutes by
activated carbons and which can lead to up to a doubling of the value of the
Freundlich exponent, nF.|
|Appears in Collections:||CQE - Publicações - Artigos em Revistas Internacionais Com Arbitragem Científica|
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