硅酸盐通报2017，Vol.36Issue(1)：214-218,5.
蒙脱土对聚羧酸减水剂的吸附特性及其影响因素研究
Absorption Characteristics and Influencing Factors of Montmorillonite to Polycarboxylate Superplasticizer
陈常亮 1郭丽萍 1杜小弟 1郑晓绮 1雷家珩1
作者信息
- 1. 武汉理工大学化学化工与生命科学学院，武汉 430070
- 折叠
摘要
Abstract
The absorption equilibrium of polycarboxylate-type superplasticizer ( PCE ) on montmorillonite ( MMT ) and its influencing factors were investigated by the gel permeation chromatography ( GPC ) method. The results show that montmorillonite had strong adsorption for PCE and its adsorption amount increased with concentration. The adsorption amount was 7. 03 mg·g-1 as the concentration of PCE was 2. 00 g·L-1(PCE standard dosage in the concrete),While the concentration of PCE was double of the above, the adsorption amount was 14. 61 mg · g-1;The maximum adsorption capacity of PCE on montmorillonite (saturated adsorption amount) was about 21. 18 mg·g-1. The change of the pH value has little impact on adsorption quantity when the concentration of PCE was lower than 2. 50 g·L-1 . But the presence of Ca2+, Mg2+metal ions could increase the adsorptionamount of PCE among which Mg2+ion was particularly evident. Further studies had shown that adsorption of PCE on montmorillonite was an endothermic process and adsorption process conforms to the secondary dynamics equation. The adsorption could reach equilibriumjust in 5-10 min.关键词
聚羧酸减水剂/蒙脱土/吸附平衡/吸附动力学/凝胶渗透色谱法Key words
polycarboxylate-type superplasticizer/montmorillonite/adsorption equilibrium/adsorption kinetics/gel permeation chromatography method分类
建筑与水利引用本文复制引用
陈常亮,郭丽萍,杜小弟,郑晓绮,雷家珩..蒙脱土对聚羧酸减水剂的吸附特性及其影响因素研究[J].硅酸盐通报,2017,36(1):214-218,5.
