Ag Biotech, LLC

Ju Young Kim

There is provided a method for preparing a natural cellulose-OAg matrix having antimicrobial activity without leaching silver from the cellulose-OAg matrix. The method comprises: introducing silver ions (Ag) into a natural cellulose matrix by dipping the natural cellulose matrix in an AgCl-dissolved NHOH solution; and substituting hydrogen (H) of hydroxyl group (&#x2014;OH) in natural cellulose with Agby drying the silver ion-infused natural cellulose matrix, thus to form a natural cotton-OAg complex. The cellulose-OAg matrix prepared in the method may be useful to continuously maintain antimicrobial activity by maintaining an effective concentration of silver, which does not have cytotoxicity to human skin, and chemically bonded silver is not leached during the rehydration due to the chemical bond between the silver and the cellulose matrix.

Method for preparing an antimicrobial cotton of cellulose matrix having chemically and/or physically bonded silver and antimicrobial cotton prepared therefrom

A lignocellulose-based anion-adsorbing medium (LAM) and process for making and using same for selectively removing phosphates and arsenic contaminants from aqueous solutions is disclosed. Making the LAM comprises (a) dissociating cations such as Fe and Al, from their counterions by adding a chemical compound containing said cations to water and acidifying; (b) pelletizing a lignocellulose; (c) adsorbing the cations to the lignocellulose by bringing the lignocellulose into contact with the solution of step (a) and incubating; and, (d) exposing the lignocellulose of step (c) to an alkaline fixing agent to replace hydrogens (H) of the hydroxyl groups of the lignocellulose with the adsorbed cations to produce the LAM with a positive charge. The LAM may be used to selectively and cost-effectively remove phosphate and arsenic contaminants from aqueous solutions by retaining them at the Fe or Al on the LAM.

Lignocellulose-based anion-adsorbing medium (LAM) and process for making and using same for the selective removal of phosphate and arsenic anionic contaminants from aqueous solutions

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Tallahassee, FL, United States of America

Ju Young Kim