PRODUCT FOR PFAS ADSORPTION

Abstract

A product for adsorbing at least one PFAS in a liquid, the product comprising attapulgite whose surface has been functionalized with: (a) a quaternary amine surface coating solution comprising a monoquaternary amine compound or a diquaternary amine compound, wherein the monoquaternary amine compound comprises one or more monoquaternary amines that attach to the attapulgite surface, wherein the diquaternary amine compound comprises one or more diquaternary amines that attach to the attapulgite surface, and (b) a surface coating agent comprising one or more mercapto groups that chemically bond to the attapulgite surface, wherein, when the quaternary amine surface coating solution comprises one or more monoquaternary amine compounds, the product is free of diquaternary amines, wherein,if the quaternary amine surface coating solution comprises one or more diquaternary amine compounds, the product is free of monoquaternary amines, wherein the product has a surface area, as measured using the BET method, in the range of 45-160 m2 / g or 50-100 m2 / g, wherein the product has a particle size distribution with a D50 of 6-30 micrometers or 10-25 micrometers or 12-25 micrometers or 12-23 micrometers.