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

LIST OF TABLES
Table 1: RO Parameters .......................................................................................................5
Table 2: Cations and Anions in Feed Water ........................................................................5
Table 3: Salt Balance ...........................................................................................................5
Table 4: Resin Characteristics .............................................................................................7
Table 5: Solubility Constants for Common Precipitates ....................................................19
Table 6: Matrix of Isotherm Experiments (Ratios are based on molarity) ........................34
Table 7: Cation Exchange Isotherm Tests .........................................................................35
Table 8: Values Calculated for Isotherms Tests with Relevant Equations ........................37
Table 9: Regression Equation and Associated Statistics for Calcium Separation Factors 38
Table 10: Parameters for Modeling the Bed Volumes to Breakthrough for Different
Separation Factors ......................................................................................................40
Table 11: Regression Equation and Associated Statistics for Magnesium Separation
Factors ........................................................................................................................43
Table 12: Anion Exchange Isotherm Tests ........................................................................46
Table 13: Calculations Required to Design Phase 2 Experiments .....................................52
Table 14: Size of Mass Transfer Zone and Efficiency of Column at Varied Separation
Factors ........................................................................................................................53
Table 15: Solution Ion Concentrations and Predicted Values for Selectivity Verification54
Table 16: Ion Concentrations in Solutions Used to Load Column Prior to Regeneration
Experiments ...............................................................................................................57
Table 17: Regeneration Operating Conditions ..................................................................57
Table 18: Feed Solution Ion Concentrations and Number of Bed Volumes .....................60
Table 19: Updated Versus Original Separation Factor Predictions for Column Tests ......60
Table 20: Predicted Versus Measured Number of Bed Volumes to Breakthrough for
Column Tests .............................................................................................................63
Table 21: Resin Phase Ion Concentrations Measured From Stripped Resin .....................69
Table 22: Solution Concentration and Calculated Separation Factors ..............................70
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