@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}
}

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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  - 

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