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研究了碱矿渣黏土复合胶凝材料(alkali-activated slag clay composite cementitious material,AASCM)水化物粉体对模拟放射性核素Cs+的吸附性能及其影响因素。将AASCM水化物粉体的吸附性能和硅酸盐水泥、铝酸盐水泥、矿渣硅酸盐水泥水化粉体的吸咐性能进行对比。结果表明:实验条件下,母液浓度提高,AASCM水化物粉体对Cs+的吸附量增大,吸附比减小。温度升高,吸附平衡时间缩短,Cs+吸附量和吸附比下降。pH值下降,Cs+吸附量下降。Cs+在AASCM粉体中的吸附在一定浓度范围内服从Freundlich吸附等温方程且为放热过程。AASCM水化物粉体较硅酸盐水泥、铝酸盐水泥和矿渣硅酸盐水泥具有更强吸附Cs+的能力。
The adsorption properties of simulated radionuclide Cs + by alkali-activated slag clay composite cementitious material (AASCM) hydrate powder and its influencing factors were studied. The adsorption performance of AASCM hydrate powder was compared with that of Portland cement, aluminate cement and slag Portland cement hydration powder. The results showed that under the experimental conditions, the mother liquor concentration increased, the adsorption capacity of AASCM hydrate powder to Cs + increased, and the adsorption ratio decreased. The temperature is increased, the adsorption equilibrium time is shortened, the amount of Cs + adsorption and the adsorption ratio are decreased. pH value decreased, Cs + adsorption decreased. The adsorption of Cs + in AASCM powder obeys Freundlich adsorption isotherm and is exothermic in a certain concentration range. AASCM hydrate powder has a stronger ability to adsorb Cs + than Portland cement, aluminate cement and slag Portland cement.