Adsorption from aqueous solutions

A change in the environment of a protein molecule, e.g. adsorption from aqueous solution onto a sorbent surface, may lead to a partial breakdown of its ordered structure, resulting in an increase of conformational entropy. This is a fundamental difference between protein adsorption and the adsorption of flexible polymers, for which attachment to a surface implies a loss of conformational entropy. 

Maity, N., and G. F. Payne (1991), "Adsorption from Aqueous Solutions Based on a Combination of Hydrogen Bonding and Hydrophobic Interaction", Langmuir 7, pp. 1247-1254. 

J. W. Balistrieri, L. In "Adsorption from Aqueous Solutions" Tewari, P. H., Ed. Plenum Publ. Corp. New York,... 

Tewari, P.H. "Adsorption from aqueous solutions" Plenum... 

Tewari, P. H. "Adsorption from Aqueous Solutions" Plenum Press New York, 1981. 

Table 8.8 Adsorption from aqueous solutions of s-triazine compounds by Na -mont-morillonite (Hayes and Mingelgrin 1991)...

Table 8.9 Percent of adsorption from aqueous solution of organophosphorus pesticides by clays (Yaron 1978)...

Fig. 8.32 Adsorption from aqueous solutions of parathion onto montmorillonite saturated with various cations. (Yaron and Saltzman 1978)...

Fig. 8.34 Parathion adsorption from aqueous solutions by three soils, before and after oxidation, as weU as on clay and organic matter. Reprinted with permission from Saltzman S, Kliger L, Yaron B (1972) Adsorption-desorption of parathion as affected by soil organic matter. J Agric Food Chem 20 1224-1227. Copyright 1972 American Chemical Society...

Metallic corrosion IV. V. Corrosion of iron and mild steel. Proc. R. Soc. A134 494 Benjamin, M.M. Bloom, N.S. (1981) Effects of strong binding adsorbates on adsorption of trace metals on amorphous iron oxyhydrox-ide. In Tewari, P.H. (ed.) Adsorption from aqueous solutions. Plenum Press, New York,... 

The adsorption of polymers at solid surfaces is substantially more complicated than that of small molecules. Typically, a small molecule adsorbs by attachment of a functional group on the molecule to a site on the surface. For the case of adsorption from aqueous solution, the process involves displacement of water from sites at the surface. The extent of adsorption is determined by the preference... 

Figure 8.7 Schematic diagram of simple monolayer and bilayer surfactant adsorption from aqueous solution.

Laszlo K, Bota A, Nagy LG (1997) Characterization of activated carbons from waste materials by adsorption from aqueous solutions. Carbon 35 593... 

Murray, D. J., Healy, T. W., and Fuerstenau, D. W., in "Adsorption from Aqueous Solution," Advances in Chemistry... 

Figure 11.1. Schematic views of various ways in which an organic chemical, i, may sorb to natural inorganic solids (a) adsorption from air to surfaces with limited water presence, (b) partitioning from aqueous solutions to the layer of vicinal water adjacent to surfaces that serves as an absorbent liquid, (c) adsorption from aqueous solution to specific surface sites due to electron donor-acceptor interactions, (d) adsorption of charged molecules from aqueous solution to complementarily charged surfaces due to electrostatic attractions, and (e) chemisorption due to surface bonding or inner sphere complex formation.

Current interest in the multi-faceted role of adsorption in the water and waste water field has been stimulated in large part by research originating within this field. Concomitantly, more and more investigations in the field of surface and colloid chemistry have focused on aqueous systems. The results of these investigations are of considerable significance to the water scientist. The convergence of interests of researchers in these two fields has provided the impetus for this joint symposium on adsorption from aqueous solution. 

In any consideration of what is presently known regarding adsorption from aqueous solution it is necessary to distinguish between neutral species, simple ions, complex ions, surface active agents, polyelectrolytes, and charged and uncharged high polymers. Much of the data available in the literature relates to the adsorption of polymers and complex-... 

The papers in this volume deal with many of the foregoing questions and problems relating to adsorption from aqueous solution. In addition to general discussions of thermodynamic and kinetic aspects of adsorption phenomena, the papers include description of the results of studies on a variety of adsorbate-adsorbent systems. Among the adsorbates studied are (1) strong electrolytes (2) unhydrolyzed multi-valent cations ... 

The papers contained in this volume, although leaving many questions unanswered and many problems unsolved, should prove a significant contribution to a general understanding of processes involved in adsorption from aqueous solution. 

---