TY - JOUR
T1 - Equilibrium studies of the uptake of aromatic compounds from an aqueous solution by montmorillonite modified with tetraphenylphosphonium and amyltriphenylphosphonium
AU - Kameda, Tomohito
AU - Shimamori, Shuko
AU - Yoshioka, Toshiaki
N1 - Publisher Copyright:
© 2014 Elsevier B.V. All rights reserved.
PY - 2015/3/15
Y1 - 2015/3/15
N2 - Montmorillonite (MMT) modified with tetraphenylphosphonium (TPP·MMT) and amyltriphenylphosphonium (AmylTPP·MMT) was shown to adsorb 1,2-dimethoxybenzene (DMB) and 1,3-dinitrobenzene (DNB) from an aqueous solution. The adsorption of DMB could be expressed by Langmuir-type adsorption isotherms. The adsorption of DMB by TPP·MMT and AmylTPP·MMT was spontaneous because the ΔG values in both cases were negative. The uptake of DMB by TPP·MMT and AmylTPP·MMT could be considered a physical adsorption process caused by π-π stacking interactions, because the ΔG values were in the range of -20 to 0 kJ mol-1. The uptake of DNB by TPP·MMT was expressed by the Halsey and Henderson models, which explained the multilayer adsorption.
AB - Montmorillonite (MMT) modified with tetraphenylphosphonium (TPP·MMT) and amyltriphenylphosphonium (AmylTPP·MMT) was shown to adsorb 1,2-dimethoxybenzene (DMB) and 1,3-dinitrobenzene (DNB) from an aqueous solution. The adsorption of DMB could be expressed by Langmuir-type adsorption isotherms. The adsorption of DMB by TPP·MMT and AmylTPP·MMT was spontaneous because the ΔG values in both cases were negative. The uptake of DMB by TPP·MMT and AmylTPP·MMT could be considered a physical adsorption process caused by π-π stacking interactions, because the ΔG values were in the range of -20 to 0 kJ mol-1. The uptake of DNB by TPP·MMT was expressed by the Halsey and Henderson models, which explained the multilayer adsorption.
KW - Equilibrium analyses
KW - Montmorillonite
KW - Mutual interactions of π electrons
KW - Stacking interactions
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U2 - 10.1016/j.jallcom.2014.11.093
DO - 10.1016/j.jallcom.2014.11.093
M3 - Article
AN - SCOPUS:84915822543
VL - 625
SP - 8
EP - 12
JO - Journal of Alloys and Compounds
JF - Journal of Alloys and Compounds
SN - 0925-8388
ER -