US H1,651 HGranted

Extraction and disposal of organic wastes with polymer coated porous substrate

OwnerWinton G. Aubert, Wayne A. Krielinventors

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Abstract

Volatile organic compounds, including, in particular, the BTEX group, present in wastewater and groundwater in concentrations of about 1.0 PPM to 100 PPM, may be removed by adsorption onto a polymer coated porous substrate. The substrate is preferably selected from a group consisting of mullite, diatomaceous earth and ground structural brick and fire brick. The polymer coatings may be applied by immersing the substrate in a solution of the polymer or the polymer coating may be generated on the substrate by polymerization of a substrate coated resin. Polystyrene, polypropylene glycol, polymethyl silicone, polyesters and polyurethanes may be used as the coating material. The adsorbent composition may be disposed in a packed column, as a liner for storage pits, as a barrier for surface bodies of water and groundwater flow, and may be regenerated or disposed of by deep well injection.

Claims7

Dependent claims

A method for removing at least a major portion of volatile organic compounds selected from the group consisting of benzene, toluene, ethylbenzene and xylene from contaminated water containing from about 1.0 to about 100 PPM of at least one of the volatile organic compounds by a method consisting essentially of:

a) coating an environmentally inert porous high surface area particulate material having a porosity of at least about 40%, a surface area of at least 50 square meters per gram and a particle size from about 20 mesh to up to about 1.0 inch in maximum particle size with a polymer coating of a polymer selected from the group consisting of polystyrene, polybutadiene, polypropylene glycol, polymethyl silicone, polyesters and polyurethane to produce an adsorbent composition
b) contacting the contaminated water with the adsorbent composition to adsorb at least a major portion of the volatile organic compounds from the contaminated water and produce an at least partially spent adsorbent composition.

Dependencies are inferred from the claim text.