Selective Salt Recovery from Reverse Osmosis Brine - University of ...

LIST OF FIGURES
Figure 1: Proposed RO Concentrate Treatment Train .........................................................3
Figure 2: Research Schedule ................................................................................................7
Figure 3: Ideal Resin Phase Concentration Profile from [17]............................................14
Figure 4: Loading and Regeneration of an Ion Exchange Column ...................................15
Figure 5: Model Scheme ....................................................................................................25
Figure 6: Response to Pulse Tracer Input for TIS Model with Differing Number of Tanks25
Figure 7: Effluent Concentration Curve from TIS Model using Different Numbers of
Tanks ..........................................................................................................................26
Figure 8: Effluent Concentration Curve from MATLAB Model using Different Numbers
of Segments ................................................................................................................26
Figure 9: Graphical User Interface for MATLAB model ..................................................27
Figure 10: Example Column Snapshot from Model ..........................................................29
Figure 11: Example Breakthrough Curve from Model ......................................................29
Figure 12: Comparison of Column Snapshots with Different Numbers of Segments .......30
Figure 13: Resin Samples ..................................................................................................33
Figure 14: Atomic Absorption Spectrometer (left) and Ion Chromatography System
(right) .........................................................................................................................34
Figure 15: Calcium Separation Factors vs. Equivalent Fraction of Calcium ....................38
Figure 16: Calcium Separation Factors vs. Solution Ionic Strength ..................................38
Figure 17: Predicted Calcium Separation Factors vs. Measured Calcium Separation
Factors ........................................................................................................................39
Figure 18: Modeled Breakthrough Curves for Systems with Separation Factors Ranging
from 1.5 to 6 ...............................................................................................................40
Figure 19: Bed Volumes to Breakthrough as a Function of Calcium Separation Factor ..41
Figure 20: Separation Factor as a Function of Ionic Strength and Equivalent Ionic
Fraction of Calcium ...................................................................................................42
Figure 21: Magnesium Separation Factors vs. Equivalent Fraction of Magnesium ..........42
Figure 22: Magnesium Separation Factors vs. Ionic Strength ..........................................43
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