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Study of the Contributions of Non‐Specific and Specific Interactions during Fluoxetine Adsorption onto Activated Carbons
Author(s) -
Román Silvia,
Nabais João Manuel Valente,
González Juan Félix,
GonzálezGarcía Carmen María,
Ortiz Angel Luis
Publication year - 2012
Publication title -
clean – soil, air, water
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.444
H-Index - 66
eISSN - 1863-0669
pISSN - 1863-0650
DOI - 10.1002/clen.201100009
Subject(s) - adsorption , freundlich equation , microporous material , chemistry , langmuir , activated carbon , bet theory , fluoxetine , specific surface area , nuclear chemistry , inorganic chemistry , chemical engineering , organic chemistry , catalysis , biochemistry , receptor , serotonin , engineering
The adsorption of fluoxetine onto activated carbons (ACs) prepared from almond tree pruning by steam and CO 2 activation under different temperature conditions (650–950°C), was studied. In both series increasing the temperature caused an increase in the BET apparent surface area, yielding ACs with S BET up to 870 and 710 m 2 g −1 after steam and CO 2 activation, respectively. Also, a slight widening of the porosity was found in both cases. In order to modify the functionality of the ACs, two of them were impregnated with triethylenediamine (TEDA) prior to the adsorption process, which caused a decrease in the AC apparent surface mainly due to micropore blockage. The fluoxetine adsorption isotherms at 25°C showed maximum adsorption capacities between 110 and 224 mg g −1 . The adsorption isotherms were analyzed using Langmuir and Freundlich models. Although the impregnation reduced the pore volume, it did not cause a decrease in the fluoxetine maximum adsorption capacity, but a modification in the adsorption mechanism was observed.