Extraction of heavy metal ions from waste colored glass through phase separation

被引：27
|
作者：
Chen, Danping
Masui, Hirotsugu
Miyoshi, Hiroshi
Akai, Tomoko
Yazawa, Tetsuo
机构：
[1] Japan Sci & Technol Agcy, PRESTO, Ikeda, Osaka 5638577, Japan
[2] Natl Inst Adv Ind Sci & Technol, Dept Innovat Sustainable Chem, Ikeda, Osaka 5638577, Japan
[3] Himeji Inst Technol, Himeji, Hyogo 6712201, Japan
来源：
WASTE MANAGEMENT | 2006年 / 26卷 / 09期
关键词：
D O I：
10.1016/j.wasman.2005.09.019
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
A new method utilizing phase separation phenomena for the extraction of heavy metal ions used as colorants in colored glass is proposed. Colored soda-lime-silica glass containing Co or Cr as a colorant was remelted with B2O3 to yield soda-lime-borosilicate glass. The soda-lime-borosilicate glass thus obtained was leached in I M nitric acid at 90 degrees C to dissolve the borate phase. All cations (Na, Ca, Cr and Co) concentrated in the borate phase are successfully leached out with the dissolution of the borate phase, when the amount of the B2O3 added to the glass and heat treatment conditions are properly chosen. Porous silicate glass powders with high SiO2 purity are obtained as the result of the leaching. Porous glass can also be formed as bulk material by controlling the composition of additives during the remelting. (c) 2005 Elsevier Ltd. All rights reserved.
引用
收藏
页码：1017 / 1023
页数：7
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