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The Development of a Fluorine Removal Agent Using Incinerated Ash




Author(s)

Masaaki Takahashi¹, Shrestha Rashim Bahadur¹, Yukimasa Takemoto¹, Maki Ooyagi¹, Kati Nabin¹, Adhikari Jayaram¹, Eiji Yuki² and Takanori Terazawa³

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DOI:10.17265/2161-6213/2019.1-2.004

1. Yokkaichi University, Research Laboratory on Environmental Technology, Kayo-cho 1200, Yokkaichi, Mie 512-8512, Japan
2. Mie Chuo Kaihatsu Co., Ltd, Hachiya 4713, Yono, Iga, Mie 518-1152, Japan
3. Mie Prefectural Environmental Conservation Agency, Ueno 3258, Kawage, Tsu, Mie 510-0304, Japan

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.

Incinerated ash, fluorine removal, aluminum phosphate, water treatment.