Apatite sequestration of selenium

DWPI Title: Method for sequestering selenium for removal from fluid, involves introducing stannous modified apatite comprising preset amount of tin into material and contacting selenium with stannous modified apatite under conditions
Abstract: A method for sequestering selenium is disclosed. The method includes contacting selenium with a stannous modified apatite under conditions whereby the selenium is absorbed by the apatite.
Use: Method for sequestering selenium for removal from fluid (claimed) e.g. soil, groundwater and streams. The stannous modified apatite can also be used as filter media and sorbent in fluid treatment system to remove selenium from contaminated fluid, to remove selenium from ponds, coal and other mineral mine tailings ponds, coal fly ash impoundments, and fluid tanks.
Advantage: The method enables excellent absorption and stabilization of selenium from a material by using apatite. Apatite used in the method is water insoluble and has excellent thermodynamic stability, and resistance to degradation in the presence of natural corrosive elements such as water.
Novelty: Method for sequestering selenium involves introducing a stannous modified apatite into a material and contacting selenium with the stannous modified apatite under conditions by which the selenium is absorbed by the stannous modified apatite. Tin present in an amount of 0.1-0.5 moles with respect to every mole of apatite.
Filed: 5/8/2013
Application Number: US13890022A
Tech ID: SD 12599.0
This invention was made with Government support under Contract No. DE-NA0003525 awarded by the United States Department of Energy/National Nuclear Security Administration. The Government has certain rights in the invention.
Data from Derwent World Patents Index, provided by Clarivate
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