Amine modified clay sorbents
AssigneeCRC CARE Pty Ltd
InventorsVenkata Subba Rao Kambala, Ravendra Naidu
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Abstract
The present invention relates to amine modified clay sorbents and methods for their use. The sorbents of the present invention have particular application for the sorption of hydrophobic contaminants, particularly constituents of AFFFs, surfactants and/or perfluorinated or polyfluorinated compounds.
Claims11
A modified clay sorbent comprising a palygorskite clay modified with a fatty amine, wherein the fatty amine comprises a mixture of oleyl amine and octyl amine, and wherein the mixture comprises 560 mmol of oleyl amine and 120 mmol of octyl amine.
A method of preparing a modified clay sorbent for separating a contaminant from a sample, the method comprising the steps of:
- (i) obtaining a palygorskite clay;
- (ii) acid activating a surface of the clay by contacting the surface of the clay with an acid;
- and
- (iii) adsorbing a fatty amine comprising a mixture of oleyl amine and octyl amine to the acid activated surface of the clay, thereby forming the modified clay sorbent, wherein the mixture of oleyl amine and octyl amine comprises 560 mmol of oleyl amine and 120 mmol of octyl amine.
Dependencies are inferred from the claim text.