TY - JOUR
T1 - An investigation into the adsorption characteristics of grafted mesoporous silicates for the removal of tetramethyl ammonium hydroxide from aqueous solution
AU - Kelleher, Brian P.
AU - Doyle, Aidan M.
AU - Hodnett, Benjamin K.
AU - O'Dwyer, Thomas F.
PY - 2002
Y1 - 2002
N2 - Four cubic mesoporous silicates (CMS), one unmodified and three grafted with amine, carboxylic and cyano surface functional groups, were prepared, characterised and compared as adsorbents for tetramethyl ammonium hydroxide (TMAH) from aqueous solution. The adsorption process was studied as a function of molecular size and CMS pore volume. Sorption on the unmodified, cyano- and carboxylic-grafted adsorbents closely followed the Langmuir model while adsorption on the amine-treated silicate conformed to the Freundlich model. A comparison of the adsorbent pore volume and the volume of sorbed TMAH molecules suggested that monolayer sorption occurred, there being some evidence that surface functional groups influenced the adsorption process. The presence or absence of structural order, as defined by X-ray diffraction analysis, had no significant influence on the adsorption, as all materials, both ordered and disordered, had relatively high adsorption capacities.
AB - Four cubic mesoporous silicates (CMS), one unmodified and three grafted with amine, carboxylic and cyano surface functional groups, were prepared, characterised and compared as adsorbents for tetramethyl ammonium hydroxide (TMAH) from aqueous solution. The adsorption process was studied as a function of molecular size and CMS pore volume. Sorption on the unmodified, cyano- and carboxylic-grafted adsorbents closely followed the Langmuir model while adsorption on the amine-treated silicate conformed to the Freundlich model. A comparison of the adsorbent pore volume and the volume of sorbed TMAH molecules suggested that monolayer sorption occurred, there being some evidence that surface functional groups influenced the adsorption process. The presence or absence of structural order, as defined by X-ray diffraction analysis, had no significant influence on the adsorption, as all materials, both ordered and disordered, had relatively high adsorption capacities.
UR - http://www.scopus.com/inward/record.url?scp=0037004532&partnerID=8YFLogxK
U2 - 10.1260/026361702321104273
DO - 10.1260/026361702321104273
M3 - Article
AN - SCOPUS:0037004532
SN - 0263-6174
VL - 20
SP - 787
EP - 796
JO - Adsorption Science and Technology
JF - Adsorption Science and Technology
IS - 8
ER -