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By M. Elimelech

Deposition and aggregation of small sturdy debris are encountered in lots of usual and commercial environments. no matter if it's deposition of debris onto a floor immersed in a liquid suspension or aggregateion of person debris, those methods are of enotmous value. they're very important to the manufacture of magnetic tape, purification of water utilizing packed mattress filters, selective catch of solids, cells and macromolecular species, and plenty of different functions. This ebook offers a unified method of the dimension, modelling and simulation of those tactics, bringing jointly the disciplines of colliod and floor chemistry, hydrodynamics, and experimental and computational tools. it will likely be required analyzing for graduates operating in approach and environmental engineering, postgraduates excited about commercial R & D and for all scientists wishing to achieve a extra special and life like figuring out of procedure stipulations in those components.

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Oxygen groups at an oxide surface). Such an interaction is said to lead to an inner sphere complex, as opposed to an outer sphere complex formed between a hydrated metal ion and a charged surface (Stumm,1992). It is reasonable to suppose that outer sphere complexes are formed entirely as a result of electrostatic attraction. However, even ions forming outer sphere complexes can show ‘specific’ differences as a result of different sizes of the hydrated ions. Strictly, the division of an interaction energy into ‘electrical’ and ‘chemical’ terms is not justified thermodynamically, but it is conceptually appealing and double layer models are often formulated in this way.

Another noteworthy approach to this problem has involved the use of computer simulation. For instance, Tome and Valleau (1979, 1980, 1982) have performed extensive Monte Carlo simulations of the double layer using a primitive model in which the electrolyte is considered to be an assembly of charged ‘hard spheres’ in a uniform dielectric medium. Their results show very good agreement with the Gouy-Stern-Grahame theory for the case where there is no specific adsorption and for relatively dilute electrolyte solutions ( ~ 0 .

1947) The electrical double layer and the theory of electrocapillarity. Chem. , Blum, L. and Lozada-Cassou, M. (1983) The statistical mechanics of the electric double layer. J. Electroanal. , 150, 291-303 Hiemenz, P. C. (1985) Principles of Colloid and Surface Chemistry, Marcel Dekker, New York Hiemstra, T. and van Riemsdijk, W. H. (1991) Physical chemical interpretation of primary charging behaviour of metal (hydr)oxides. Colloids Surfaces, 59, 7-25 Hunter, R. J. (1981) Zeta Potential in Colloid Science, Academic Press, London Hunter, R.

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