Adsorption of alkyltrimethylammonium bromide surfactants at the air/water interface
MetadataShow full item record
© 2016 Elsevier Ltd The dynamic behavior of three trimethylammonium bromide surfactants, C 14 TAB, C 15 TAB and C 16 TAB, was studied by a dynamic modeling framework, which consists of the Ward and Tordai equation and an adsorption isotherm. Three adsorption isotherms, Langmuir, Henry and Freundlich, were used separately. The simplest isotherm, Henry isotherm, could not fit experimental data. Freundlich isotherm can model C 15 TAB and C 16 TAB adsorption, but failed to describe C 14 TAB. On the other hand, Langmuir isotherm was able to model all three surfactants. The results confirmed that the adsorption isotherm is monotonic but non-linear for all surfactants. In the other words, the surfactants have not reached the saturation at the CMC. The results also demonstrated a monotonic correlation between carbon length and adsorption effectiveness of the cationic surfactants. The new insights are important for designing new cationic surfactants.
Showing items related by title, author, creator and subject.
Che Ibrahim, Shariff (2010)Barley straw, an agricultural byproduct, was identified as a potential adsorbent material for wastewater treatment as it offers various advantages such as abundant availability at no or very low cost, little processing ...
Le, Ngoc Thu (2012)Surfactants are widely use in our daily activities such as in mineral separation, water purification, petroleum refining/processing, etc. Surfactants behaviour at the gas/liquid interface is one of the interesting research ...
Casandra, A.; Tsay, R.; Phan, Chi; Lin, S. (2017)© 2016 Elsevier B.V. The study of surfactant adsorption kinetics at a gas-liquid interface has essentially been built with the Gibbs adsorption equation. A simple one-parameter adsorption equation without using the Gibbs ...