The adsorption of cesium by sulfonic acid functionalized hollow mesoporous silica microspheres.

With the development of nuclear industry, radioactive elements such as Cs put a threat on the water environment. It is a challenging task to remove the Cs in the nuclear wastewater. In the current study, we prepared a new Cs-adsorbing material by introducing sulfhydryl group onto the surface of hollow mesoporous silica microspheres, then oxidizing the sulfhydryl group to sulfonic acid group.