PDF(Pubmed)
Abstract：
The primary objective of this study is to investigate and develop a rapid and effective method for the immobilization of Sr in the event of a nuclear leakage incident. Coal gangue, an underutilized form of solid waste from the coal industry, can be used as a raw material for curing Sr due to its high content of silica-alumina oxides. In the present study, Sr was successfully solidified in cancrinite synthesized using a hydrothermal method with coal gangue as raw material. A stable cancrinite phase was formed at a relative alkali concentration of more than 6 M. When the Sr/Al(Si) ratio was <1/6, cancrinite was the only stable phase that varied with the hydrothermal temperature and time. When the Sr/Al(Si) ratio increased to 1/2, the cancrinite phase completely disappeared, and a new strontium feldspar phase (SrAl2Si2O8) appeared. PCT leaching experiments showed that when Sr/Al(Si) < 1/6, the Sr leaching rate of Sr-cancrinite samples obtained by hydrothermal synthesis at 180 °C for 24 h was very low.
摘要：
这项研究的主要目的是研究和开发一种在发生核泄漏事件时固定Sr的快速有效方法。煤矸石,煤炭行业未充分利用的固体废物，由于其高含量的二氧化硅-氧化铝氧化物，可用作固化Sr的原料。在本研究中,以煤矸石为原料，采用水热法合成的松质岩中成功地固化了Sr。在大于6M的相对碱浓度下形成稳定的对象石相。当Sr/Al（Si）比<1/6时，对象石是唯一的稳定相随水热温度和时间而变化。当Sr/Al（Si）比增加到1/2时，cancrinite相完全消失，出现了新的锶长石相(SrAl2Si2O8)。PCT浸出实验表明，当Sr/Al（Si）<1/6时，通过在180°C下进行24h的水热合成获得的Sr-cancirnite样品的Sr浸出率很低。
