ALEXANDRIA, Va., July 21 -- United States Patent no. 12,685,994, issued on July 21, was assigned to Imam Abdulrahman Bin Faisal University (Dammam, Saudi Arabia).

"Water purification method using biochar layered double hydroxide composite" was invented by Mukarram Zubair (Dammam, Saudi Arabia).

According to the abstract* released by the U.S. Patent & Trademark Office: "A method of adsorbing a dye from an aqueous solution including contacting a composition with the aqueous solution. At least a portion of the dye adsorbs to the composition. The composition includes biochar, cellulose nanocrystals, and a layered double hydroxide (LDH). The LDH includes Cu and Fe. Particles of the LDH and the biochar at least partially cover an outer surface ...