CR 88 Radium Selective Resin
Aldex Chelation Resin (CR) Series
CR 88 Radium Selective Resin
Aldex CR 88 is a high capacity, high quality, barium infused gel-type cation resin used in the selective removal of radium from drinking and underground water without the generation of sludge or other unwanted waste. It is supplied in the sodium form as beige-colored opaque beads in 1 cubic foot bags and larger bulk packages.
Aldex CR 88 Technical Bulletin: US units (PDF)
Aldex CR 88 Safety Data Sheets: English (PDF) | Français (PDF)
Physical Chemical Properties
| Polymer Structure: | Styrene crosslinked with divinylbenzene (S-DVB) |
| Physical Form: | Beige, opaque spherical beads |
| Mean diameter: | 400 ± 80 μm |
| Moisture Content: | 61 to 72% |
| Total Capacity: | 0.8 eq/l |
| Specific Gravity: | 1.22 g/mL |
| Net Weight (as shipped): | 48 lbs per cubic foot |
Recommended Operating Conditions
| Operating Temperature: | 212 °F maximum |
| Influent pH: | 0 to 14 |
| Operating Manner: | Downflow |
| Volumetric Flow: | 1 to 5 US GPM per cubic foot |
| Linear Velocity: | 5 to 15 US GPM per square foot |
| Radium capacity: | 11 to 18 nanocuries/g |
CR 88 Features
Removes Radium
Aldex CR 88 is a highly effective and cost-efficient resin that removes radium from drinking water and groundwater without producing any waste or sludge.
Excellent mechanical strength
The optimized formulation and ion exchange matrix of Aldex CR 88 provides excellent mechanical strength during the radium selective extraction process.
Reliability
Over 40 years of actual field usage by thousands of customers demonstrates the reliability of Aldex brand resins.
Safety Information
A material safety data sheet is available for Aldex CR 88. Copies can be obtained from Aldex Chemical Co., LTD. Aldex CR 88 is not a hazardous product and is not WHMIS controlled.
Caution: Acidic and basic regenerant solutions are corrosive and should be handled in a manner that will prevent eye and skin contact. Before using strong oxidizing agents in contact with ion exchange resin, consult sources knowledgeable in the handling of these materials.
CR 88 Operating Suggestions
Lead-lag operation is suggested in order to fully utilize the resin in the lead tank before re-bedding.
Backwash Characteristics
Aldex CR 88 should be backwashed for at least 10 minutes after each service cycle in a conventionally down flow regenerated softener. To reclassify the beads and remove suspended solids from the top of the bed, the resin bed should be expanded at least 50% according to Fig. 1. For non-conventional or upflow regenerated softeners, it may not be necessary to follow the above procedure since the backwash and brine injection is incorporated in the same step.
Fig. 1 Bed expansion vs. backwash flow rate for various water temperatures
Pressure Drop
Fig. 2 shows the expected pressure loss per foot of bed depth as a function of linear flow rate.
Fig. 2 Pressure Drop vs. Flow Rate