This paper deals with a preliminary study aimed at investigating the adsorption capacity of an innovative natural environmental friendly adsorbing material, consisting in an organo-zeolite, made by irreversibly binding humic acids onto natural zeolite. The removal of ibuprofen sodium salt, a non-steroidal anti-inflammatory drug among the most detected emerging contaminants into aquatic environments, was investigated by batch tests. Experiments were carried out under neutral pH and at a temperature of 25 ° C. The kinetic and the equilibrium adsorption capacity were also investigated. Data show that a pseudo-second order rate equation can be used to describe the kinetics of Ibuprofen adsorption, while the equilibrium adsorption is adequately described by the Langmuir isotherm model. A comparison between the organo-zeolite and the raw zeolite shows that the adsorption capacity of the organo-zeolite was about 3 times higher than that of the raw material with a maximum amount can be adsorbed (q max), extracted by Langmuir equation, of 0.205 mg g−1 and 0.078 mg g−1 , respectively.

Ibuprofen adsorption on organo-zeolite: Experimental and modelling analysis

LEONE, VINCENZO;Musmarra, Dino;Erto, Alessandro;Iovino, Pasquale
2017

Abstract

This paper deals with a preliminary study aimed at investigating the adsorption capacity of an innovative natural environmental friendly adsorbing material, consisting in an organo-zeolite, made by irreversibly binding humic acids onto natural zeolite. The removal of ibuprofen sodium salt, a non-steroidal anti-inflammatory drug among the most detected emerging contaminants into aquatic environments, was investigated by batch tests. Experiments were carried out under neutral pH and at a temperature of 25 ° C. The kinetic and the equilibrium adsorption capacity were also investigated. Data show that a pseudo-second order rate equation can be used to describe the kinetics of Ibuprofen adsorption, while the equilibrium adsorption is adequately described by the Langmuir isotherm model. A comparison between the organo-zeolite and the raw zeolite shows that the adsorption capacity of the organo-zeolite was about 3 times higher than that of the raw material with a maximum amount can be adsorbed (q max), extracted by Langmuir equation, of 0.205 mg g−1 and 0.078 mg g−1 , respectively.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11588/697558
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