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Novel Remediation Techniques


Steam Stripping


The steam stripping method is based on a mass transfer concept, which is used to move volatile contaminants from water to air. Steam is injected through an injection well into the soil to vaporize volatile and semi-volatile contaminants. The contaminated vapour steam is removed by vacuum extraction, and the contaminants are then captured through condensation and phased separation processes.

Dehalogenation


Dehalogenation of organic compounds is chemical displacement of a chlorine molecule and resulting reduction of toxicity.

Chemical Reduction/Oxidation


Chemical reduction/oxidation is a chemical conversion of hazardous contaminants to non-hazardous or less toxic compounds. The result is a more stable, less mobile and/or inert material.

Ultraviolet (UV) oxidation


Ultraviolet (UV) oxidation technology uses UV radiation, ozone, or hydrogen peroxide to destroy or detoxify organic contaminants as water flows into a treatment tank. The reaction products are dechlorinated materials and chlorine gas.

Supercritical Fluids Extraction


Supercritical fluids are materials at elevated temperature and pressure that have properties between those of a gas and a liquid. Under these conditions, the organic contaminant readily dissolves in the supercritical fluid. Supercritical fluids processes represent emerging technologies in the site remediation field. Few full-scale applications of Supercritical fluids are currently in existence.

OVERVIEW OF REMEDIATION TECHNOLOGIES

This flowchart illustrates all possible stages of the remediation process and is fully interactive; click on each process box for a detailed description...