RO Antiscalant for Fluoride-Rich Groundwater
CAS Number: N/A (blend)
Specialty antiscalant formulated to prevent CaF₂ and fluorapatite [Ca₅(PO₄)₃F] scale formation in RO and NF systems treating fluoride-rich groundwater (F⁻ 5–50 mg/L). Threshold inhibitors and dispersants prevent crystal nucleation on membrane surfaces at concentrations well above fluoride solubility limits in the concentrate stream.
Technical Specifications
| dosage | 3–8 mg/L (higher dose required at F⁻ >20 mg/L or recovery >75%) |
| packaging | 25 kg drum or IBC 1000 L |
| appearance | Clear liquid |
| effective pH | 6.5–8.5 |
| target scale | CaF₂ (calcium fluoride) and fluorapatite Ca₅(PO₄)₃F |
| fluoride feed range | 5–50 mg/L F⁻ in RO feed water |
| secondary scale control | CaCO₃ and CaSO₄ (broad-spectrum co-inhibition) |
Applications
- Groundwater RO systems in high-fluoride geological zones (Africa, India, China)
- Rural fluoride removal RO drinking water treatment
- Agricultural irrigation water fluoride RO treatment
- Industrial process water RO with fluoride-bearing feed
- Combined fluoride and hardness removal RO systems
- NF systems for partial fluoride reduction
Key Features
- CaF₂ and fluorapatite specific: controls scale types that general antiscalants often fail to inhibit
- Effective across feed pH 6.5–8.5, covering the typical groundwater pH range without pre-adjustment
- Handles F⁻ feed concentrations up to 50 mg/L — well above WHO guideline of 1.5 mg/L
- Broad co-inhibition of CaCO₃ and CaSO₄ from hard groundwater matrices
- Liquid formulation compatible with standard chemical dosing equipment
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