Column mass balance

Water flows into the water column at a volumetric flow rate Q containing a total metal concentration Cin. It is assumed that water flows out from the column at the same rate and at the same concentration as in the water column. Mass balances on the water column and top sediment layer give... 

The phenomenological description of the retention mechanism discussed above is only applicable for the system with single partitioning process and well-defined stationary and mobile phases. A more general method for the derivation of retention function is based on the solution of column mass balance [17]. 

The above equation has been derived from a column mass balance and is valid under the conditions of constant temperature and pressure. It is also required to assume that the isotherms are linear in the concentration range studied. The left side of the equation is known experimentally as a function of x from the response peaks... 

From the column mass balance it is possible to obtain (W)... 

Specify the Feed/Product Composition. The user can specify any feed composition and product distribution. All entries must be greater than 0 and less than 1. When a value is changed in this panel, the column mass balance is automatically updated. 

Specify the Feed Conditions. Here the user is able to set the feed flowrate to the column, as well as the feed quality. If either one of these properties are adjusted, the column mass balance automatically changes. 

However, since the external column mass balance says F - D = B, the last equation becomes... 

Eq. (7 31) is easily sinplified with the overall column mass balance... 

Experimental results (Figure 18-IS) and the shockwave analysis showed that the wave shape for constant pattern waves is independent of the distance traveled. This allows us to decouple the analysis into two parts. First, the center of the wave can be determined by analyzing the shock wave with solute movement theory. Second, the partial differential equations for the column mass balance can be sirtplified to an ordinary differential equation by using a variable = t - z/u jj that defines the deviation from the center of the wave. This approach is detailed in more advanced sources (e.g., Ruthven. 1984 Sherwood et al.. 1975 Wankat. 19901. 

Description i) the possible products (or feasible separation regions) are determined from the knowledge of the existing concentration profiles within the column, which in turn are represented by reactive distillation lines ii) the column mass balance is included and Hi) possible separation borders are identified. 

Following the column mass balance based development of (7.1.15c), one can determine the concentration wave velocity of the shockwave at time t when the exit concentration jumps from C 2 = 0 to C, the incoming concentration ... 

Sediment bed model. Both particles and chemicals move across the sediment-water interface. This is reflected in the processes of deposition, dissolution and resuspension quantified above in the water column mass balance. It is conventional to segment the bed vertically in the z-direction. The transient equation describing the vertical distribution of chemicals within the... 

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