초록

A process for removing dissolved radioactive materials from aqueous solution by adjusting pH of the solution to greater than 9.0 and incorporating approximately 80 to 100 mg/l of alum, lowering the pH of the solution to a range of between 5.5 and 7.0.

대표청구항 ▼

A process for decontaminating a water solution having contained therein naturally occurring radioactive materials, said solution containing dissolved uranium and having both alpha particle and beta particle activity and a pH of about 7.0-8.6, comprising the steps of: adjusting the pH of the solution

A process for decontaminating a water solution having contained therein naturally occurring radioactive materials, said solution containing dissolved uranium and having both alpha particle and beta particle activity and a pH of about 7.0-8.6, comprising the steps of: adjusting the pH of the solution to greater than 9.0 and less than 10.0 while simultaneously rapidly mixing said solution; adding approximately eighty to one hundred milligrams per liter of alum while simultaneously rapidly mixing said solution for a period of at least 1 minute, thereby lowering the pH of the solution to between 5.5 and 7.0; slowing mixing said solution for a period of about twenty minutes to thereby form a precipitate containing aluminum hydroxide and said dissolved uranium in said solution; and separating said precipitate from the solution. The process as defined in claim 1 further including the step of incorporating simultaneously with the addition of alum approximately 6.0 milligrams per liter of hydrogen peroxide.