南京工业大学学报（自然科学版）2017，Vol.39Issue(1)：31-38,8.DOI:10.3969/j.issn.1671-7627.2017.01.006
CSH凝胶对K＋和Na＋的吸附作用
Adsorption of K+and Na+by C-S-H gel
摘要
Abstract
To investigate adsorption of K+ and Na+ by calcium silicate hydrate(C⁃S⁃H) gel,C⁃S⁃H gels with different n( Ca)/n( Si) were prepared by hydration of 3CaO·SiO2( C3 S) incorporated with different substitution levels of nano⁃SiO2 . Effects of alkali solution concentration and solid content on the K+ and Na+ adsorption were studied. Results showed that adsorption capacity of K+ and Na+ increased with the decrease of n(Ca)/n(Si) ratio.For a given n(Ca)/n(Si),with the alkali solution concentration and solid content increased,the adsorption capacity of K+ and Na+increased,while the K+ and Na+adsorption content by C⁃S⁃H gel decreased with the increase of solid content�K+and Na+adsorption capacity of C⁃S⁃H gel was affected not only by the specific surface area,but also by the concentration of Ca2+changed by pH value of the solution.At high Ca/Si ratio or low pH value,alkali adsorption was suppressed by higher Ca2+ concentration�Desorption test demonstrated that adsorption of K+ and Na+ on C⁃S⁃H gel was reversible,when the alkali solution concentration was lower than 0�5 mol/L.关键词
C S H凝胶/K+和Na+/吸附/脱附Key words
C-S-H gel/K+ and Na+/adsorption/desorption分类
化学化工引用本文复制引用
陆国森,邓敏,莫立武,黄蓓..CSH凝胶对K＋和Na＋的吸附作用[J].南京工业大学学报（自然科学版）,2017,39(1):31-38,8.基金项目
江苏高校优势学科建设工程；长江学者和创新团队发展计划 （）
