水泥固化体中Cs+浸出行为研究

研究了25、40、70、90℃下碱矿渣 黏土复合胶凝材料(AASCM)和普通硅酸盐水泥(OPC)固化体中Cs⁺的浸出行为，并对浸出机理进行了探讨。结果表明：在25、40、70、90℃下，AASCM固化体和OPC固化体浸出行为不同，OPC固化体中Cs⁺的累积浸出分数在4个温度下趋于同一数值，而AASCM固化体中Cs⁺的累积浸出分数则随温度升高而增大。AASCM固化体中Cs⁺的存在状态为溶解态、吸附态及固溶态并存，而OPC固化体中则主要为溶解态和固溶态。AASCM固化体中处于吸附态和固溶态的Cs⁺接近90%，处于溶解态的约为10%；而OPC固化体中处于固溶态的约为40%，处于溶解态的约为60%。

Leaching Behavior of Cs+ in Cement-Solidified Waste Forms

The leaching behavior of Cs⁺ in alkali-activated slag-clay minerals composite cement (AASCM) and ordinary portland cement (OPC) waste forms at temperatures of 25, 40, 70, and 90 ℃ was researched. The leaching mechanism was also discussed. The results indicate that the leaching behaviors of Cs⁺ in the AASCM and OPC waste forms are quite different. The cumulative leaching fractions (CLF) of Cs⁺ in the OPC waste form tend to be a same value at the four temperatures while the CLF of Cs⁺ in the AASCM waste form increase with increasing temperature. In the AASCM waste form, the state of adsorption/solid solution Cs⁺ is about 90% and the dissolution Cs⁺ is about 10%. The existent state of Cs⁺ in the OPC waste form mainly includes the solid solution Cs⁺ and dissolution Cs⁺, which are 40% and 60%, respectively.