With further strict environmental standards and the upcoming increase in fluoride ion emission standards (F-<2mg), in response to this technical challenge and market demand, efficient defluorination agents have been developed based on the characteristics of fluorine-containing industrial wastewater domestically and internationally.
Defluorination agents are molecular adsorbents with a large specific surface area, mainly composed of inorganic coagulants such as aluminum salts, iron salts, and magnesium salts. When mixed with water, they form a certain strength of gel structure and have certain defluorination, decolorization, and adsorption performance, which are suitable for the treatment of low-concentration fluorine-containing wastewater.
Functions and efficacy of defluorination agents:
1. Defluorination agents can undergo chemical adsorption and ion exchange with fluoride ions in water, achieving the effect of removing fluoride ions.
2. Defluorination agents have fast adsorption, desorption, regeneration, and reusability.
3. After activation treatment, defluorination agents can improve their adsorption capacity and defluorination effectiveness.
Usage precautions for defluorination agents:
1. When using defluorination agents, attention should be paid to controlling the appropriate dosage to avoid excessive emissions causing environmental pollution.
2. Before use, the defluorination agent should be added to the fluoride-containing wastewater to fully dissolve it, and then a certain amount of coagulant should be added to the dissolved defluorination agent solution for coagulation and precipitation treatment.
3. When using, attention should be paid to controlling the appropriate pH value to avoid poor defluorination effects due to excessively high or low pH values.
4. The determination of the dosage should be based on the comprehensive factors such as the original water quality, treatment process, and equipment material performance.
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