MINERALOGICAL REMOVAL METHOD AND APPARATUS FOR HIGHLY CONCENTRATED IODINE IN RADIOACTIVE WASTEWATER

摘要

Provided are a mineralizing removal method and apparatus for highly concentrated iodine in radioactive wastewater. According to the present invention, since only a small amount of sludge is discharged as compared to the previous treatment methods, a generation amount of the radioactive waste may be significantly decreased, such that wastewater containing highly or ultra-highly concentrated iodine may also be effectively treated. Further, only iodine may be selectively removed regardless of the presence of competitive anions in the wastewater. Treatment may be performed under a neutral or weak alkaline condition rather than an acidic condition, such that a volatilization of radioactive iodine was fundamentally blocked, and at the time of discharging the wastewater, a neutralization treatment process is not required. In addition, long term storage stability of radioactive waste may be significantly promoted by using phase-conversion of malachite and an iodine crystallization method as compared to the previous adsorption methods.

主权项

1. A mineralizing removal method for highly concentrated iodine in radioactive wastewater, the mineralizing removal method comprising:
a) injecting a reducing agent into wastewater containing radioactive iodine in an anoxic tank to prepare anaerobic wastewater; b) injecting a stabilizer and a copper ion source into the anaerobic wastewater to form malachite nanoparticles; c) injecting an iodine mineralization catalyst to the wastewater in step b) to phase-convert the malachite nanoparticles into copper iodide and grow a crystal; and d) separating the copper iodide from purified wastewater.