Solid materials for removing arsenic and method thereof

US7393810B2 · kind B2 · utility

Assignee

• Lawrence Livermore National Security, LLC · US

Inventors

• Paul R. Coronado · Livermore, US
• Sabre J. Coleman · Oakland, US
• Robert D. Sanner · Livermore, US
• Victoria L. Dias · Livermore, US
• John G. Reynolds · Corona, US

Key dates

• Filing date: Dec 4, 2003
• Grant date: Jul 1, 2008
• Expiry date: Dec 4, 2023

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B01J20/3204
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

Solid materials have been developed to remove arsenic compounds from aqueous media. The arsenic is removed by passing the aqueous phase through the solid materials which can be in molded, granular, or powder form. The solid materials adsorb the arsenic leaving a purified aqueous stream. The materials are aerogels or xerogels and aerogels or xerogels and solid support structure, e.g., granulated activated carbon (GAC), mixtures. The species-specific adsorption occurs through specific chemical modifications of the solids tailored towards arsenic.