摘要
A macroporous silica-based silver loaded adsorbent was synthesized by grafting the silver complexes of thiourea(Ag(tu)3NO3) into a silica-based copolymer support(Si O2-P). The adsorbent was used to uptake iodide anions(I–) by batch and column techniques. The kinetic and saturated adsorption experiments were carried out by varying the shaking times and initial concentration of I–. Experimental results shown that the kinetic adsorption of I–was controlled by a pseudo second order model and the saturated adsorption of I–was controlled by the chemisorption mechanism, which followed a Langmuir adsorption equation. The breakthrough curve of I–had a S-shaped profile. The column efficiency was estimated to be over 90%.
A macroporous silica-based silver loaded adsorbent was synthesized by grafting the silver complexes of thiourea （Ag（tu）3NO3） into a silica-based copolymer support （SiO2-P）. The adsorbent was used to uptake iodide anions （I^-） by batch and column techniques. The kinetic and saturated adsorption experiments were carried out by varying the shaking times and initial concentration of I^-. Experimental results shown that the kinetic adsorption of I^- was controlled by a pseudo second order model and the saturated adsorption of I^- was controlled by the chemisorption mechanism, which followed a Langmuir adsorption equation. The breakthrough curve of I^- had a S-shaped profile. The column efficiency was estimated to be over 90%.
基金
Supported by National Natural Science Foundation of China(Nos.21261140335 and 91126006)
the Scientific Research Foundation for Youth Scholars of Shanghai Jiao Tong University(No.AF0200003)
关键词
吸附剂
碘离子
二氧化硅
载银
离子对
聚合物载体
大孔
吸附实验
Iodide anion,Silver complexes of thiourea,Grafting,Macroporous silica-based support,Radioactive contaminated wastewater
