In this work, the ability of surface modified zeolite (SMZ), obtained by ion exchange of phillipsite-rich tuff with HDTMA (hexadecyltrimethylammonium)-Br or HDTMA-Cl, to adsorb amoxicillin was investigated. The effect of surfactant modification was explored by contacting the tuff with HDTMA solutions at different concentrations (50–200% of the zeolite’s external cation exchange capacity). It was found that for the higher surfactant concentration used the formation of a surfactant bilayer (compact for HDTMA-Br, patchy HDTMA-Cl) occurs. The results of the adsorption experiments showed that SMZ exhibited a higher adsorption capacity (especially at low solute concentrations) and a faster adsorption rate for amoxicillin than the unmodified tuff. The interaction between amoxicillin and the adsorbents was mainly ascribed to electrostatic forces.
Adsorption of amoxicillin onto organo-modified zeolitic tuff / de Gennaro, B.; Fenti, A.; Salvestrini, S.. - In: ADVANCED SCIENCE LETTERS. - ISSN 1936-6612. - 23:6(2017), pp. 5944-5947. [10.1166/asl.2017.9076]
Adsorption of amoxicillin onto organo-modified zeolitic tuff
de Gennaro B.
Membro del Collaboration Group
;
2017
Abstract
In this work, the ability of surface modified zeolite (SMZ), obtained by ion exchange of phillipsite-rich tuff with HDTMA (hexadecyltrimethylammonium)-Br or HDTMA-Cl, to adsorb amoxicillin was investigated. The effect of surfactant modification was explored by contacting the tuff with HDTMA solutions at different concentrations (50–200% of the zeolite’s external cation exchange capacity). It was found that for the higher surfactant concentration used the formation of a surfactant bilayer (compact for HDTMA-Br, patchy HDTMA-Cl) occurs. The results of the adsorption experiments showed that SMZ exhibited a higher adsorption capacity (especially at low solute concentrations) and a faster adsorption rate for amoxicillin than the unmodified tuff. The interaction between amoxicillin and the adsorbents was mainly ascribed to electrostatic forces.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
