Effect of Silica Addition on Lead Ion Adsorption Ability of Alkali-Activated Blast Furnace Slag

被引：0
|
作者：
Uchida, Yosuke [1 ]
Iwaki, Takumi [1 ]
Hongo, Teruhisa [1 ]
机构：
[1] Saitama Inst Technol, Fac Engn, Dept Life Sci & Green Chem, 1690 Fusaiji, Fukaya, Saitama 3690293, Japan
来源：
GLASS PHYSICS AND CHEMISTRY | 2023年 / 49卷 / 06期
关键词：
blast furnace slag; alkali activation; lead ion; adsorption; silica; ASH BASED-GEOPOLYMER; METAKAOLIN;
D O I：
10.1134/S1087659623600035
中图分类号：
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Blast furnace slag is produced in large quantities as a by-product in the steel manufacturing process. In this study, a method for synthesizing lead ion adsorbent with high adsorption ability was investigated by alkali activation of the blast furnace slag. A sodium hydroxide aqueous solution was used as an alkali activator, and silica was added to the aqueous solution to improve the adsorption capacity. Alkali activation of the blast furnace slag with the sodium hydroxide aqueous solution yielded lead ion adsorbent. Addition of silica to the sodium hydroxide aqueous solution further increased the lead ion adsorption capacity. Langmuir adsorption isotherms revealed that the highest maximum adsorption capacity of 1658.1 mg-Pb/g was obtained when 5 g of silica was added to 50 mL of the sodium hydroxide aqueous solution. The adsorption capacity for lead ion decreased when more than 10 g of silica was added to the sodium hydroxide aqueous solution.
引用
收藏
页码：651 / 656
页数：6
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