Most fluoride-bearing wastewater contains much more than fluoride. Sulfate, chloride, nitrate, and bicarbonate can be present at concentrations far higher than fluoride itself.
For conventional anion exchange resins, this creates three major challenges:
- Competing ions take over.
Sulfate and other preferred anions occupy exchange sites first, allowing fluoride to pass through. The resin may be loaded — just not with fluoride. - High salinity reduces performance.
High TDS weakens the driving force for fluoride uptake, reducing working capacity and shortening service cycles. - Regeneration becomes less efficient.
Competing ions consume regenerant and increase chemical costs, while fouling and scaling can further reduce resin performance.
Selectivity Matters More Than Capacity
The solution is not simply adding more resin or regenerant. It is the resin chemistry.
Resins with specially designed functional groups can provide higher fluoride selectivity in complex, high-salinity water — even when chloride and sulfate are present at much higher concentrations.
HRS-700A — For High-Salt Fluoride Removal
Designed for challenging streams such as:
RO concentrates
FGD wastewater
Mining and metallurgical brines
Chemical wastewater with high salinity
HRS-700B — For Conventional Conditions
For industrial wastewater and polishing applications with moderate salinity and a more predictable anion matrix, HRS-700B provides reliable fluoride removal with a more economical solution.
The key is choosing the resin according to the water matrix — not using one resin for every application.
Disclaimer: Hairun Resin and its affiliates expressly disclaim all express or implied warranties (including, without limitation, warranties of timeliness, accuracy, completeness, reliability, or fitness for a particular purpose) with respect to the content of this document (including forward-looking statements). Neither Hairun Resin nor its affiliates shall be held liable for any consequences arising from errors, omissions, or other deficiencies in the document.
