US 12,168,614 B2
Amorphous carbons for phosphate removal and methods thereof
Manuel Garcia-Perez, Richland, WA (US); Michael A. A. Apasiku, Albuquerque, NM (US); Sohrab Haghighi Mood, Pullman, WA (US); and Jean-Sabin McEwen, Pullman, WA (US)
Assigned to Washington State University, Pullman, WA (US)
Filed by Washington State University, Pullman, WA (US)
Filed on Sep. 16, 2021, as Appl. No. 17/476,891.
Claims priority of provisional application 63/079,343, filed on Sep. 16, 2020.
Prior Publication US 2022/0081323 A1, Mar. 17, 2022
Int. Cl. C02F 1/28 (2023.01); B01J 20/02 (2006.01); B01J 20/04 (2006.01); B01J 20/20 (2006.01); C02F 101/10 (2006.01)
CPC C02F 1/283 (2013.01) [B01J 20/0229 (2013.01); B01J 20/0259 (2013.01); B01J 20/04 (2013.01); B01J 20/20 (2013.01); B01J 2220/42 (2013.01); B01J 2220/4831 (2013.01); C02F 2101/105 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A method of adsorbing phosphate, said method comprising the step of contacting an adsorbent composition with a liquid composition comprising the phosphate,
wherein the phosphate in the liquid composition is adsorbed by the adsorbent composition, and
wherein the adsorbent composition comprises i) a carbon-containing material, ii) nitrogen, and iii) one or more metals, wherein the carbon-containing material is biochar, and wherein the one or more metals comprises magnesium, calcium, or a combination thereof,
wherein the carbon-containing material are doped with the nitrogen, and
wherein the one or more metals is embedded in a matrix of the carbon-containing material.