摘要
本文研究了水溶液中SO42-和NO3-在有机改性凹凸棒土上的单组分吸附行为和竞争吸附行为,提出了凹凸棒土的改性以及吸附阴离子的机理。结果表明表面活性剂改性凹凸棒土对SO24-的吸附量大于NO3-,单组分吸附时对Freundlich和Langmuir方程拟合较好,竞争吸附时用LCA模型(Langmuir Competitive Adsorption)和IAS(IdealAdsored solution)模型进行预测,结果IAS无法收敛,LCA能够反应其竞争吸附规律并可以对其他的竞争吸附体系做出很好的预测。
The adsorption of sulfate ions and nitrate ions onto surfactant-modified palygorskite both in single component system and two competitive system were studied and the modifying and anions adsorbing mechanisms of surfactant-modified palygorskite were proposed.The results showed that SO2-4 had a more adsorptive capacity than NO-3,and both of them are fitted to not only Freundlich isotherm but also Langmuir isotherm,while only Langmuir Competitive Adsorption（LCA） can be fitted in two competitive system and can be used as prediction of other competitive system.
出处
《硅酸盐通报》
CAS
CSCD
北大核心
2011年第5期1059-1063,1071,共6页
Bulletin of the Chinese Ceramic Society
基金
国家自然科学基金(No.50902060)
江苏省自然科学基金(No.BE2009014)
江苏省凹土重点实验室基金(No.HPK200902)
关键词
有机改性
凹凸棒土
单组分吸附
竞争吸附
surfactant-modified
palygorskite
single component adsorption
competitive adsorption
