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Article
Conversion of Aluminum Phosphate to Sodium Phosphate
Author(s)
Masaaki Takahashi1*, Yukimasa Takemoto1, Maki Ooyagi1, Ken Oonishi2 and Eiji Yuuki2
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DOI:10.17265/2161-6213/2016.11-12.005
Affiliation(s)
1. Yokkaichi University, Research Laboratory on Environmental Technology, Kayo-cho 1200, Yokkaichi, Mie, 512-8512, Japan
2. Mie Chuo Kaihatsu Co., Ltd, Hachiya4713, Yono, Iga, Mie, 518-1152, Japan
ABSTRACT
The phosphorus recovered from sewage sludge by acidic treatment is mainly composed of aluminum phosphate. To make a wide utilization of recovered phosphorus, removal of the aluminum component is considered a very important matter. In order to find a method to convert aluminum phosphate to sodium phosphate, a basic investigation was carried out. A reagent of aluminum phosphate was dissolved by aqueous solution of sodium hydroxide, and mixed with sodium silicate to make a alunino-silicate gel. Sodium phosphate was recovered from residue water in the gel.
KEYWORDS
Aluminum phosphate, sodium phosphate, gelation, sodium silicate.
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