In this work, the ability of surface modified zeolite (SMZ), obtained by ion exchange of phillipsite-rich tuff with HDTMA (hexadecyltrimethylamm onium)-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

SALVESTRINI, Stefano;
2017

Abstract

In this work, the ability of surface modified zeolite (SMZ), obtained by ion exchange of phillipsite-rich tuff with HDTMA (hexadecyltrimethylamm onium)-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.
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11591/375327
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus ND
  • ???jsp.display-item.citation.isi??? 3
social impact