摘要
SBA-15是具有较大孔径和良好的热稳定性的多孔硅基分子筛,在吸附分离领域有着广阔的应用前景。合成了介孔硅基材料SBA-15,对其进行了TEM和FTIR表征,并进行了SBA-15对铯的吸附性能研究,探讨了不同的p H值,铀初始浓度,吸附材料用量,反应时间以及离子强度等条件对吸附性能的影响。结果表明,在p H=6,吸附时间120 min,铯初始浓度为40 mg/L时,SBA-15对铯的吸附容量达到26.31 mg/g。较高的p H值有利于铯的吸附,而离子强度对吸附明显有抑制作用。吸附等温线拟合结果符合Langmuir等温模型,拟一级动力学模型能较好地描述反应动力学。
SBA-15 is a porous silicon molecular sieve with large aperture and good thermal stability. It shows a promising prospect in the field of separation.In this study, mesoporous silica SBA-15 was synthesized and employed to investigate cesium sorption from aqueous solution.The synthesized SBA-15 was characterized with TEM and FTIR.The effects of pH, cesium initial concentration, adsorbent dosage,contact time and ionic strength on the sorption of cesium were studied in details.The experimental results showed that the sorption equilibrium could be achieved in 120 rain at pH = 6.The cesium sorption capacity was found to be 26.31 mg/g at the cesium initial concentration of 40 mg/L.The sorption isotherm and kinetics were investigated.The sorption equilibrium data was well fitted with Langmuir isotherms, and the sorption kinetics was well defined by the Pseudo-first-order model.
出处
《江西农业大学学报》
CAS
CSCD
北大核心
2015年第2期363-368,共6页
Acta Agriculturae Universitatis Jiangxiensis
基金
国家自然科学基金(21367001)
江西省教育厅基金(GJJ13471)
东华理工大学核资源与环境重点实验室开放基金(101119)
放射性地质与勘探技术国防重点学科实验室项目(2011RGET012
2011RGET015)
国家留学基金委2014国家公派高级研究学者及访问学者(含博士后)项目(留金发【2014】3012号)
