Uranium & Radionuclide Removal
A real, documented groundwater uranium removal system — from Liberty's own project commissioning record, not vendor marketing copy.
Groundwater uranium removal for potable water uses targeted anion ion exchange, not standard water softening. Uranium exists in groundwater as an anionic uranyl-carbonate complex, requiring a strong-base Type 2 anion resin rather than a cation softening resin. A real California project (Del Oro Water Company's River Island Territory, combining two well sites at 100 GPM) achieved 98+% uranium reduction using a twin-vessel progressive configuration with volumetric regeneration and a deliberate 5.2x safety margin below the resin's TENORM accumulation threshold.
River Island Territory — Documented Numbers
| Design flow rate | 100 GPM combined |
| Influent uranium | 0.0232 mg/L |
| Regulatory limit (CA MCL) | 20 pCi/L / 30 µg/L |
| Resin | ResinTech SBG2-HP, Type 2 anion, Cl⁻ form |
| Design loading rate | 7.96 GPM/sq.ft. (2.85 GPM/CF) |
| Regeneration throughput | 49,318 gal/CF (~5.2x margin below TENORM threshold) |
| Performance target | 98+% uranium reduction, below CA MCL |
Source: Liberty's own commissioning plan for Del Oro Water Company, dated 2026-02-23 — the strongest evidentiary tier this project uses, since it's a real completed Liberty project record. These specific numbers are this project's own engineered sizing, not universal constants for any uranium removal system.
The Real Engineering Logic
Anion exchange, not cation: uranium in groundwater at typical pH exists as an anionic uranyl-carbonate complex — a strong-base Type 2 anion resin (chloride form) removes it; a cation softening resin would not.
Progressive vessel configuration: two vessels operate lead/lag rather than parallel, so one is always polishing behind the other, maximizing time-to-breakthrough for the regulated contaminant.
Volumetric regeneration trigger: the control valve regenerates based on a pre-calculated gallon throughput setpoint from its own inline flow meter — not time-based or breakthrough-sampling based — appropriate when a regulated contaminant's breakthrough is the failure mode being guarded against.
TENORM avoidance via conservative margin: rather than relying on downstream waste characterization to catch a problem after it occurs, the regeneration setpoint is fixed at a large safety margin (~5.2x) below the resin's own stated TENORM accumulation threshold.
Frequently Asked Questions
Why does uranium removal need anion exchange resin instead of a standard water softener?
Uranium in groundwater at typical pH exists as an anionic uranyl-carbonate complex, not a simple cation — which is why a strong-base Type 2 anion resin (chloride form) removes it, while a standard cation softening resin would not. This is a real, distinct treatment mechanism from hardness removal, even though the equipment (twin-vessel ion exchange) looks superficially similar.
Why is a "progressive" (lead/lag) vessel configuration used instead of parallel vessels?
A progressive configuration operates two vessels in sequence — one always polishing behind the other — which maximizes time-to-breakthrough for a target contaminant like uranium. A simple parallel split doesn't provide that same extended breakthrough protection, which matters when the failure mode being guarded against is a regulated contaminant exceeding its MCL, not just general capacity.
What is a volumetric regeneration trigger, and why use it for uranium removal?
Regeneration fires at a pre-calculated gallon throughput setpoint (in this real case, 1,726,130 gallons per vessel), measured by the control valve's own inline flow meter — not on a time clock and not by sampling for breakthrough. This is a different control philosophy from a typical water softener's time-based regeneration, appropriate when a regulated contaminant's breakthrough (not just hardness) is the failure mode being prevented.
What is TENORM and how is it avoided in uranium removal systems?
TENORM (Technologically Enhanced Naturally Occurring Radioactive Material) is a real regulatory classification risk when radionuclide-loaded resin accumulates beyond a threshold — in this real project, the resin manufacturer's stated TENORM accumulation limit was 257,342 gal/CF. The design set the regeneration throughput setpoint at 49,318 gal/CF, a deliberate ~5.2x safety margin below that limit, so the resin bed is never operated anywhere near TENORM classification.
Designing a radionuclide removal system?
Send LibertyCES your influent water quality, flow rate, and target MCL — we'll help design the right ion exchange configuration.
Ready to buy or need a fast answer? Call, text, or email James directly — (559) 395-5500 · [email protected].