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Preservatives reaction-diffusion interaction

Finally, the balance equation for the SMSL looks like Eq. 23-30, except for the reaction term which is not necessarily linear now. Note that Cssc depends also on z (the depth in the lake, not the depth in the sediment column). Every depth zone has its own SMSL, but it is assumed that these layers do not interact with each other. In fact, the distance between them is much too large for lateral molecular diffusion in the sediments to play any role. There is no equation for the particles in the SMSL. Their balance is indirectly included in the preservation factor (3(z). Remember that if total solids are used to describe the solid phase, (3 is about 1, whereas if particulate organic carbon (POC) is used, (3 is smaller than one because part of the POC is degraded in the SMSL. Finally, we get ... [Pg.1088]

The simulation of motion of the solvent as a Langevin-type Brownian motion is a most useful device to reduce computing time. Nevertheless, the essential features of the solvent cage are preserved. Allen was particularly interested in the reaction occurring in the low coupling limit, that is where the solvent does not interact with the particle which is transfered, B. However, when there is some interaction, the rate coefficient becomes diffusion-limited and can be described by a Kramers expression quite well (see Chap. 8, Sect. 2.4) [67]. [Pg.336]


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See also in sourсe #XX -- [ Pg.98 ]




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