Soluble and insoluble radioactive cesium in municipal solid waste incineration fly ash were analyzed by X-ray diffraction and gamma-ray spectrometry. A total of 60% of soluble radioactive cesium was determined using the Tessier extraction method, and it was almost same extraction rate with Japanese leaching test No.13. In addition, chloride compounds such as halite (NaCl) and sylvite (KCl) showed same behavior with soluble radioactive cesium, therefore, soluble radioactive cesium existed as a chloride (CsCl) with water solubility characteristics. Almost insoluble radioactive cesium trapped into silicate of crystalline phase or amorphous phase was eluted by hydrogen fluoride treatment. Radioactive 137Cs was released in three stages by heating treatment (untreated - 400 °C, 600 °C-800 °C, and 800 °C-1000 °C) according to decreasing amorphous content. The relationship between the concentrations of radioactive 137Cs and amorphous phase exhibited good linearity (R = 0.9278). Insoluble radioactive 137Cs was contained in inner part of the amorphous phase, and free radioactive cesium was determined from the concentration of the amorphous phase.

中文翻译：

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城市固体废物焚烧飞灰中可溶和不可溶放射性铯的特征。

通过X射线衍射和γ射线光谱法分析了城市固体垃圾焚烧飞灰中的可溶性和不溶性铯。使用Tessier萃取法测定了60％的可溶性放射性铯，与日本13号浸出试验的萃取率几乎相同。另外，盐酸盐（NaCl）和钾盐（KCl）等氯化物与可溶性放射性铯表现出相同的行为，因此，可溶性放射性铯以具有水溶性的氯化物（CsCl）的形式存在。通过氟化氢处理将几乎不溶的放射性铯捕获到结晶相或非晶相的硅酸盐中。根据非晶质含量的降低，通过热处理（未处理-400°C，600°C-800°C和800°C-1000°C）分三个阶段释放放射性137Cs。放射性137Cs的浓度与无定形相之间的关系表现出良好的线性（R = 0.9278）。在非晶相的内部含有不溶性放射性137Cs，由非晶相的浓度求出游离放射性铯。