Breakthrough concentration

Figure 15. Predicted vs. experimentally obtained mass transfer coefficients as functions of breakthrough concentration for the high concentration CO,/5A rum...

In Figure 6.24, C0 is the initial concentration, Ce is the breakthrough concentration, Ve is the fed volume of the aqueous solution of the solute A to breakthrough, and Vb is the fed volume to saturation (the previous description is as well valid for a or gaseous mixture). This is a response curve where the relation between concentration and time at the outlet of the packed bed adsorption reactor is shown. 

This study investigated the role of colloid particles with or without carbonates dispersed from lime-stabilized biosolids to mediate the transport of associated metals through intact soil monoliths in laboratory leaching experiments. The biosolid colloids were applied to undisturbed soil monoliths of a Maury soil under steady rate (2.2 cm/lr1) gravity flow conditions. Deionized water spiked with metals at levels similar to the total load (soluble plus sorbed) carried by the colloids was used as a control leaching treatment. The eluents were monitored for colloid, Cu, Zn, and Pb breakthrough concentrations. 

The curve t, then advances to form the curve t2 at time t2- The curve shows a breakthrough of concentration of some fraction of [C ]. This breakthrough concentration appears in the effluent. Finally t2 advances to at time At this time, the bed is almost exhausted. The profile concentration represented by curve t, is called an active zone. This zone keeps on advancing until the whole bed becomes totally exhausted. 

Figure 13. Experimental permeability reduction (filled symbols) and breakthrough concentration histories (open symbols) for varying droplet size in the 1170-mD core. Oil viscosity was 1.5 mPa s q is reduced effluent volume concentration, and Dd is droplet diameter. (Reproduced from reference 11. Copyright 1984 American Chemical Society.)...

Currently, the client s unit operates 30 days until regeneration the client would like to double that time if possible so as to limit down time and increase profits. The density of JB26 is 42 Ib/ft and it will treat a stream with an inlet concentration (C,) of 3.5mg/L. In addition, the breakthrough concentration has been set at 0.5mg/L. 

For the FACP method, frontal analysis might be used to check the determined isotherm at the breakthrough concentration. 

Draw a typical sorption isotherm show on it and discuss the conditions for which the K, concept applies, for which the breakthrough concentration is defined, and for which mineral saturation is attained. 

Procedures. Procedures were developed for measuring plutonium distribution coefficients for batch equilibrium adsorption measurements and for measuring plutonium breakthrough concentrations for column flow-through adsorption experiments. 

To prevent an excessive temperature increase across the bed due to the heat of adsorption, inlet solvent concentrations are usually limited to about 50 g/m. In most systems the solvent-laden air stream is directed upwards through a fixed carbon bed. As soon as the maximum permissible breakthrough concentration is attained in the discharge clean air stream, the loaded adsorber is switched to regeneration. To reverse the adsorption of the solvent, the equilibrium must be reversed by increasing the temperature and decreasing the solvent concentration by purging. 

Alkaline-treated H-ZSM-5 samples were evaluated for their abihty to remove EtO from streams of dry and humid air. Breakthrough curves recorded at 15 and 80% RH are shown in Figures 5 and 6, respectively, and illustrate that all samples show some ability to remove EtO. The breakthrough concentration of EtO is 1.8 mg/m. Data presented in Figures 5 and 6 illustrate the low concentration portion of the EtO breakthrough curves. These data, rather than full breakthrough curves are illustrated in order to evaluate the performance of the filtration material at breakthrough. 

---