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Preparation and use of a mesoporous silicate material for the removal of tetramethyl ammonium hydroxide (TMAH) from aqueous solution
Author(s) -
Kelleher Brian P,
Doyle Aidan M,
O'Dwyer Thomas F,
Hodnett Benjamin K
Publication year - 2001
Publication title -
journal of chemical technology and biotechnology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.64
H-Index - 117
eISSN - 1097-4660
pISSN - 0268-2575
DOI - 10.1002/jctb.508
Subject(s) - adsorption , ammonium hydroxide , endothermic process , aqueous solution , desorption , chemistry , sorption , mesoporous material , langmuir adsorption model , inorganic chemistry , methanol , chemical engineering , langmuir , organic chemistry , catalysis , engineering
A cubic mesoporous silicate (CMS) was prepared, characterised, and assessed as an adsorbent for tetramethyl ammonium hydroxide (TMAH) from aqueous solution. The adsorption process was studied as a function of temperature and time. Sorption closely followed the Langmuir model. The adsorption of TMAH on CMS was endothermic and kinetic studies suggest that the overall rate of adsorption was pseudo‐second‐order. Pore diffusion effects contribute to limiting the overall rate of adsorption while at lower initial TMAH concentrations, film diffusion becomes more important. Desorption studies were carried out using water and methanol. Methanol was the superior desorbing agent. © 2001 Society of Chemical Industry