Previous research demonstrated that counterions play an important role in stabilizing sorbed surfactant bilayers, which is comparable to the role they play in stabilizing surfactant micelles in solution. The results also indicate that the counterion influences the maximum sorption of surfactant on the zeolite surface, following the trend HDTMA-Br>HDTMA-Cl>HDTMA-HSO4. Recently, research has been focused on the determination of a possible anion selectivity sequence for the surfactant-modified zeolite, similar to the selectivity cationic sequence for zeolites and clays. on these basis the aim of the paper is to study the anionic exchange isotherms of a clinoptilolite, functionalized with HDTMA-Br or HDTMA-Cl, for the anions Br-, Cl-, NO3-, and ClO4-, in order to evaluate the relevant thermodynamic parameters.
Anion exchange selectivity of surfactant-modified zeolites for environmental remediation / DE GENNARO, Bruno; Catalanotti, Lilia; R. S., Bowman; Colella, Carmine. - STAMPA. - 1:(2010), pp. 74-75. (Intervento presentato al convegno 8th International Conference on the Occurence, Properties and Utilization of Natural Zeolites tenutosi a Sofia, Bulgaria nel 10-18 luglio 2010).
Anion exchange selectivity of surfactant-modified zeolites for environmental remediation
DE GENNARO, BRUNO;CATALANOTTI, LILIA;COLELLA, CARMINE
2010
Abstract
Previous research demonstrated that counterions play an important role in stabilizing sorbed surfactant bilayers, which is comparable to the role they play in stabilizing surfactant micelles in solution. The results also indicate that the counterion influences the maximum sorption of surfactant on the zeolite surface, following the trend HDTMA-Br>HDTMA-Cl>HDTMA-HSO4. Recently, research has been focused on the determination of a possible anion selectivity sequence for the surfactant-modified zeolite, similar to the selectivity cationic sequence for zeolites and clays. on these basis the aim of the paper is to study the anionic exchange isotherms of a clinoptilolite, functionalized with HDTMA-Br or HDTMA-Cl, for the anions Br-, Cl-, NO3-, and ClO4-, in order to evaluate the relevant thermodynamic parameters.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
