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基于蒙脱石具有良好的阳离子交换性能,采用静态吸附法,对阜新钙基蒙脱石吸附模拟核素Sr、Cs的吸附条件和吸附行为进行了研究。结果表明:蒙脱石样品对Sr2+、Cs+的饱和吸附量分别为0.271mmol/g和0.780mmol/g,在较大的pH值范围(4～11)内具有良好的吸附稳定性;蒙脱石对Sr2+、Cs+的吸附类型以阳离子交换吸附为主,符合Langmuir和Freundlich模型,但与Langmuir吻合更好,相关系数分别达到0.99924和0.99995。本实验研究对于处理低浓度的含Sr、Cs放射性废液具有重要的意义。
Based on the good cation exchange performance of montmorillonite, the adsorption conditions and adsorption behaviors of Fuxin calcium-based montmorillonite on simulated nuclides Sr and Cs were studied by static adsorption method. The results showed that the saturated adsorption capacity of montmorillonite to Sr2 + and Cs + was 0.271 mmol / g and 0.780 mmol / g, respectively. The adsorption capacity of montmorillonite was good in the range of pH 4 to 11. The adsorption types of Sr2 + and Cs + are cation exchange adsorption, which are in accordance with the Langmuir and Freundlich models, but agree well with Langmuir. The correlation coefficients are 0.99924 and 0.99995 respectively. The experimental study for the treatment of low concentrations of Sr, Cs radioactive waste has important significance.