RECOVERY OF PHOSPHATE FROM UNUSED RESOURCES

Shigeru Sugiyama; Dai Ioka; Tomoki Hayashi; Makiko Noguchi; Keizo Nakagawa; Ken-Ichiro Sotowa; Kyoko Takashima

doi:10.3363/prb.25.18

Shigeru Sugiyama, Dai Ioka, Tomoki Hayashi, Makiko Noguchi, Keizo Nakagawa, Ken-Ichiro Sotowa, Kyoko Takashima

Author information

Shigeru Sugiyama
Department of Advanced Materials, Institute of Technology and Science, The University of Tokushima
Department of Geosphere Environment and Energy, Center for Frontier Research of Engineering, The University of Tokushima
Department of Chemical Science and Technology, The University of Tokushima
Dai Ioka
Department of Chemical Science and Technology, The University of Tokushima
Tomoki Hayashi
Department of Chemical Science and Technology, The University of Tokushima
Makiko Noguchi
Department of Chemical Science and Technology, The University of Tokushima
Keizo Nakagawa
Department of Advanced Materials, Institute of Technology and Science, The University of Tokushima
Department of Geosphere Environment and Energy, Center for Frontier Research of Engineering, The University of Tokushima
Department of Chemical Science and Technology, The University of Tokushima
Ken-Ichiro Sotowa
Department of Advanced Materials, Institute of Technology and Science, The University of Tokushima
Department of Geosphere Environment and Energy, Center for Frontier Research of Engineering, The University of Tokushima
Department of Chemical Science and Technology, The University of Tokushima
Kyoko Takashima
Tokushima Prefectural Institute of Public Health and Environmental Sciences

Keywords: Recovery of phosphate, Aqueous phosphate, Dephosphorization slag, Unused resources

JOURNAL FREE ACCESS

2011 Volume 25 Pages 18-22

DOI https://doi.org/10.3363/prb.25.18

Details

Abstract

The recovery of aqueous phosphate from a model solution consisting of NH₄⁺, NO₂^- and NO₃^-, which are contained in a surplus that phosphate in rivers in Tokushima Prefecture, Japan, using boehmite together with the elution behaviors of phosphate from dephosphorization slag using various eluates were examined. The recovery of aqueous phosphate using boehmite was not influenced by the coexistence of those nitrogen-containing contaminants under various pH conditions. For the elution behaviors of phosphate from dephosphorization slag, it was found that aqueous HNO₃ among various acidic and basic solutions was a suitable solution as an eluate. Present study suggests that the employment of the unused resources such as aqueous phosphate in rivers and phosphate in the dephosphorization slag can be used as a possible candidate as a new raw material for rare phosphate.

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