Direct immobilization of iodine-loaded silver-coated silica gel with silicate glass powders at low temperature

To long-term immobilization of secondary iodine-waste, iodine loaded silver-coated silica-gel (AgIs), glass-powder was used to directly solidify AgIs at low temperature. B 2 O 3 -Bi 2 O 3 -ZnO-SiO 2 was used as raw materials to manufacture the glass-matrix under different temperature. The samples with the richest glass phase were obtained at 1000 °C, and were used to solidify AgIs with different content of I − . The sample with 30 wt % I − possessed the highest amorphous index (0.62) at 600 °C. Element I was uniformly distributed, and the density reached to 3.06 g/cm 3 . This work highlights a simple way to solidify secondary iodine-waste at low temperature. Graphic abstract