The Development of a Fluorine Removal Agent Using Incinerated Ash

Calcium-based compounds are used as fluorine removal treatment materials in water. However, due to the water solubility of calcium fluoride, there is a problem with low fluorine removal performance. For this reason, various removing agents including phosphorus have been developed. We have found that a combination of aluminum phosphate recovered from incinerated ash of the sewage sludge and refuse incineration ash has a high fluorine removal performance. At the highest removal performance, F ion concentration of the treated water reached 0.1 mg/L, so an optimal formulation method was investigated.