【摘要】 在分析若干矿物材料的基本物性基础上,对其吸附放射性核素锶、铯的性能进行了研究。沸石、钠化改性凹凸棒石粘土矿物对锶、铯具有优良的吸附性能。矿物对锶、铯的吸附以化学吸附为主,物理吸附不是决定的因素。由热活化高岭土、新疆沸石、改性凹凸棒粘土为基质材料构成的富铝碱矿渣粘土矿物胶凝材料具有高强、较低孔隙率、较少的有害孔、抗硫酸盐侵蚀和耐辐照性能好的特点。以此材料为基材的模拟放射性废物固化体Sr2+、Cs+的浸出率较低。更多还原

【Abstract】 The adsorptive capabilities of mineral materials for radionuclide Sr,Cs were investigated on the ground of basic physics and chemical properties.Mineral materials with excellent adsorptive capabilities are zeolite and Na-plygorskite clay,and their adsorptions mainly belong to chemical adsorptions.The composition and some properties of Alumina-rich alkali-activated slag clay minerals（RA-AASCM）cementitious materials for immobilization of radioactive waste are studied.Experimental results show that heat activated kaolinite,Xinjiang zeolite,modified attapulgite clay are better constituents of RA-AASCM.RA-AASCM pastes exhibit high strength,low porosity,fewer harmful pores,high resistance to sulphate corrosion and to gamma irradiation.The Sr²⁺,Cs⁺ leaching portion,of the simulated radioactive waste forms based on RA-AASCM,is low.更多还原