The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 05, 2017
Filed:
Nov. 24, 2010
Weiliang Gong, Rockville, MD (US);
Werner Lutze, Chevy Chase, MD (US);
Ian L. Pegg, Alexandria, VA (US);
Weiliang Gong, Rockville, MD (US);
Werner Lutze, Chevy Chase, MD (US);
Ian L. Pegg, Alexandria, VA (US);
Atkins Global Solutions, LLC, Salt Lake City, UT (US);
Abstract
Treatment of a radioactive waste stream is provided by adding sodium hydroxide (NaOH) and/or potassium hydroxide (KOH) together with a rapidly dissolving form of silica, e.g., fumed silica or fly ash. Alternatively, the fumed silica can be first dissolved in a NaOH/KOH solution, which is then combined with the waste solution. Adding a binder that can be a mixture of metakaolin (AlO.2SiO), ground blast furnace slag, fly ash, or other additives. Adding an 'enhancer' that can be composed of a group of additives that are used to further enhance the immobilization of heavy metals and key radionuclides such asTc andI. An additional step can involve simple mixing of the binder with the activator and enhancer, which can occur in the final waste form container, or in a mixing vessel prior to pumping into the final waste form container, depending on the particular application.