Sediment structure

Ozawa, 1963 Sugimura and Uyeda, 1973). For example, Sugimura and Uyeda (1973) summarized volcanic rocks, degree of deformation of sediments, structural trends of sediments deposited, and amount of uplift and subsidence since Miocene. 

The extraction of aromatic chlorophenols (e.g., chloroguaiacols, chloro-catechols) is complicated by the different sorption processes that control their binding within the soil-sediment structure [411-413]. The free, physically adsorbed chlorophenolics can be extracted with solvent, but this may only account for 1-5% of the total concentration of these pollutants in the sediment. Martinsen et al. [414] found that -hexane or cyclohexane and iso-propanol... 

For the special case of the sediment-water interface, DA is determined by the aqueous diffusivity, the sediment structure (porosity, tortuosity, pore size), and the sorption property of the chemical. Let us demonstrate this by applying the theory of transport of sorbing chemicals in fluid-filled porous media, which we have derived in Chapter 18.4 and Box 18.5, to the special case of diffusion in the sediment column. Since for this particular situation the fluid in the pore space is water, the subscript f (fluid) is replaced by w (water) while the superscripts sc and op mean sediment column and open water. 

LSSE Lake Sediment Structure and Evolution (Group)... 

To illustrate the behavior of the cylinder model and also to demonstrate how irrigated burrows can be expected to influence Mn " profiles, a representative vertical profile predicted by Eqs. (6.14) and (6.15) for Mn " has been plotted for the case A i = 0 (Fig. 19). The production rate for Mn ", r, rz, and L are those for core NWC-4 based on the solid-phase dissolution rate of Section 6.4.1 (Table V divided by average porosity 0.750) and the cylinder-model values of Table V in Part I. The value of D is estimated from the molecular diffusion coefficient at infinite dilution T = I9°C (Li and Gregory, 1974), multiplied by a correction factor for sediment structure of 0.56. This factor was approximated by

[Pg.392]

Clean and moisten the sediment surface and cover it with stripes of transparent plastie film (Renberg, 1981b Petterson et al., 1993, 1999). Water enhances the visibility of sediment structures and plastic film prevents drying and water reflections. 

X-radiography X-rays that pass through heterogeneous media such as sediments are absorbed by certain components. Passing X-rays are captured on an X-ray sensitive film where they produce radiographs of the sediment structure. 

Natta catalysts is determined by AS-2-to-AS-3 ratio, which in their turn is determined by catalytically active sediment structure. 

Various fine-grain sediment structures, (a) Undisturbed saltwater sediment (flocculated), (b) undisturbed freshwater sediment (partially flocculated), and (c) remolded sediment (dispersed). 

Figure 13 shows an integrated sedimentation structure based on hydrophobic valving for the initial, overflow-based metering, a radially flat and narrow transfer channel to throttle the flow such that the suspension has sufficient time to sediment in the separation chamber before pure supernatant is passed on to the plasma chamber. From there, the plasma can, for instance, be forwarded downstream structures by a hydrophilic capillary while halting the rotation. 

Types of Sediment-Structure Relations in the Identification of Paleo-earthquakes... 

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