ID 109888
著者
杉山, 茂 Department of Advanced Materials, Institute of Technology and Science, The University of Tokushima|Department of Resource Circulation Engineering, Center for Frontier Research of Engineering, The University of Tokushima 徳島大学 教育研究者総覧 KAKEN研究者をさがす
キノシタ, ハルカ Department of Chemical Science and Technology, The University of Tokushima
シノミヤ, イッペイ Department of Chemical Science and Technology, The University of Tokushima
キトラ, リュウタ Department of Chemical Science and Technology, The University of Tokushima
中川, 敬三 Department of Advanced Materials, Institute of Technology and Science, The University of Tokushima|Department of Resource Circulation Engineering, Center for Frontier Research of Engineering, The University of Tokushima KAKEN研究者をさがす
加藤, 雅裕 Department of Advanced Materials, Institute of Technology and Science, The University of Tokushima 徳島大学 教育研究者総覧 KAKEN研究者をさがす
マスモト, コウヘイ Japan Recycling Light Technology & System
キーワード
Used Fluorescence Tube
Recovery of Phosphate
Enrichment of Rare Earth Elements
資料タイプ
学術雑誌論文
抄録
During the recovery of phosphorus from the powder collected in a bag filter during the recycling of used fluorescence tubes (bag-powder), the batch method with aqueous HNO3 was used to examine the elution behavior of aqueous phosphate contained in the bag-powder. The main components of the bag-powder included Ca2+, PO4 3- and Y3+ along with Si4+, Sr2+ and lanthanide cations such as La3+ and Ce4+. Therefore, it seemed possible that, with the selective dissolution of Ca2+ and PO4 3- from the bag-powder, these lanthanide cations in the residue could be enriched. With the batch method, most of the phosphate in the bag-powder was dissolved within 0.2 min using 1.0 mol/L HNO3. The dissolution behavior of calcium cation was similar to that of the phosphate. In contrast, the dissolution of yttrium, the content of which was the highest among the lanthanide cations in the bag-powder, was increased with the dissolution times, reaching complete dissolution after 24 h. The Sr2+, La3+ and Si4+ in the bag-powder, however, did not dissolve under the same conditions. Although Ca2+, PO4 3- and Y3+ were the main components in the nitric acid extract, Y3+ was separated as YPO4 at pH = 4.0, while Ca2+ and PO4 3- were separated as calcium phosphates at pH= 7.0. These results revealed that the separation of calcium phosphates, YPO4 and some residue was possible, and resulted in the enrichment of lanthanide cations along with the recovery of phosphorus from the bag-powder. Using the present technique, 91% of the P in the bag-powder was recovered.
掲載誌名
Journal of Chemical Engineering of Japan
ISSN
00219592
cat書誌ID
AA00709658
48
2
開始ページ
99
終了ページ
103
並び順
99
発行日
2015-02
備考
Copyright © 2015 The Society of Chemical Engineers, Japan
EDB ID
出典
Journal of Chemical Engineering of Japan (2015) Vol.48 No.2 p.99-103 (doi: 10.1252/jcej.14we171)
出版社版URL
フルテキストファイル
言語
eng
著者版フラグ
著者版
部局
理工学系