In this section
@article{Parbhakar:2007:10.1016/j.colsurfa.2007.05.022,
author = {Parbhakar, A and Cuadros, J and Sephton, MA and Dubbin, W and Coles, BJ and Weiss, D},
doi = {10.1016/j.colsurfa.2007.05.022},
journal = {COLLOID SURFACE A},
pages = {142--149},
title = {Adsorption of L-lysine on montmorillonite},
url = {http://dx.doi.org/10.1016/j.colsurfa.2007.05.022},
volume = {307},
year = {2007}
}
TY - JOUR
AB - Amino acid adsorption on smectite is relevant to prebiotic processes involving possible catalytic reactions in the early Solar System, as implied by the clay-organic correlation found in meteorites, and the generation and modification of organic components essential for the origin of life. Here we report the results of a study investigating the adsorption of l-lysine (0.025–0.4 M) onto montmorillonite. The reaction products were studied using X-ray diffraction, chemical analysis and infrared spectroscopy.We find that lysine adsorption is first dominated by cation exchange and then by adsorption of electrically neutral lysine (as a zwitterion), as indicated by chemical and FTIR evidence. At the maximum concentration, lysine displaces only ∼1/3 of the original interlayer cations. The d-spacing of the smectite–lysine complex increases from 1.2 to 2.1 nm as more lysine enters the interlayer space, and water is expelled. We propose a structural model of lysine sorption in the interlayer in which lysine is oriented at >45–90 to the plane of siloxane O atoms.
AU - Parbhakar,A
AU - Cuadros,J
AU - Sephton,MA
AU - Dubbin,W
AU - Coles,BJ
AU - Weiss,D
DO - 10.1016/j.colsurfa.2007.05.022
EP - 149
PY - 2007///
SN - 0927-7757
SP - 142
TI - Adsorption of L-lysine on montmorillonite
T2 - COLLOID SURFACE A
UR - http://dx.doi.org/10.1016/j.colsurfa.2007.05.022
VL - 307
ER -