丙烯腈复合材料的合成及其对铀吸附性能的研究

Synthesis of Acrylonitrile Composite Material for the Adsorption of Uranium

以聚丙烯腈、三氯化铁与磷酸氢二铵为原料,合成出氮、磷、铁掺杂纳米碳球((Fe)N-P/Cns),其比表面积为557.22 m^2/g。通过静态吸附法研究其对铀的吸附性能,考察了pH、吸附时间、铀初始浓度和温度等因素的影响。结果表明,(Fe)N-P/Cns对铀的吸附过程受pH影响显著,是一个自发的吸热过程,吸附符合准二级动力学和Langmuir模型,最大吸附量可达325.1 mg/g。本研究成果有望用于放射性废水中提取分离铀。

N-Fe-P nano balls((Fe)N-P/Cns)was synthesized by using polyacrylonitrile,ferric chloride,and diammonium hydrogen phosphate as source materials,and its specific surface area was 557.22 m2/g.The influence of pH,absorption time,uranium initial concentration and temperature on uranium sorption on(Fe)N-P/Cns were investigated by static absorption method to find out the optimal absorption conditions.The results showed that uranium sorption on(Fe)N-P/Cns was pH-dependent,and that the adsorption of U is a spontaneous and decalescence adsorption process.This adsorption process followed the pseudo second-order reaction kinetics and Langmuir isotherm,with the maximum adsorption capacity of 325.1 mg/g.The research results could be applied for the absorption and separation of uranium from aqueous solution.