TY - JOUR
T1 - A key parameter on the adsorption of diluted aniline solutions with activated carbons
T2 - The surface oxygen content
AU - Pardo, Beatrice
AU - Ferrer, Nabí
AU - Sempere, Julià
AU - Gonzalez-Olmos, Rafael
N1 - Publisher Copyright:
© 2016 Elsevier Ltd
PY - 2016/11
Y1 - 2016/11
N2 - A total of 11 different commercial activated carbons (AC) with well characterized textural properties and oxygen surface content were tested as adsorbents for the removal of aniline as a target water pollutant. The maximum adsorption capacity of aniline for the studied AC was from 138.9 to 257.9 mg g−1 at 296.15 K and it was observed to be strongly related to the textural properties of the AC, mainly with the BET surface area and the micropore volume. It was not observed any influence of the oxygen surface content of the AC on the maximum adsorption capacity. However, it was found that at low aniline aqueous concentration, the presence of oxygen surface groups plays a dominant role during the adsorption. A high concentration of oxygen surface groups, mainly carboxylic and phenolic groups, decreases the aniline adsorption regardless of the surface area of the AC.
AB - A total of 11 different commercial activated carbons (AC) with well characterized textural properties and oxygen surface content were tested as adsorbents for the removal of aniline as a target water pollutant. The maximum adsorption capacity of aniline for the studied AC was from 138.9 to 257.9 mg g−1 at 296.15 K and it was observed to be strongly related to the textural properties of the AC, mainly with the BET surface area and the micropore volume. It was not observed any influence of the oxygen surface content of the AC on the maximum adsorption capacity. However, it was found that at low aniline aqueous concentration, the presence of oxygen surface groups plays a dominant role during the adsorption. A high concentration of oxygen surface groups, mainly carboxylic and phenolic groups, decreases the aniline adsorption regardless of the surface area of the AC.
KW - Activated carbon
KW - Adsorption
KW - Adsorption isotherm
KW - Aniline
KW - Surface characterization
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U2 - 10.1016/j.chemosphere.2016.07.066
DO - 10.1016/j.chemosphere.2016.07.066
M3 - Article
C2 - 27497348
AN - SCOPUS:84980396697
SN - 0045-6535
VL - 162
SP - 181
EP - 188
JO - Chemosphere
JF - Chemosphere
ER -
