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Comment Environment, Health, Safety & Security

A cheaper way to destroy organic contaminants?

By Gerald Parkinson |

An ultraviolet oxidation process for the destruction of water-borne organic contaminants that combines UV with chlorine, rather than hydrogen peroxide, is being developed by MIOX Corp. (Albuquerque, N.M.; www.miox.com). The company’s Advanced Oxidation Process (AOP) promises to be less expensive than traditional AOP treatment methods, says Susan Rivera, manager of research and development. AOP combines UV oxidation with MIOX’s main business — systems for the onsite generation of chlorine for water disinfection. In that process, food-grade salt is added to water, then the sodium chloride solution is passed through an electrolytic cell to convert the chloride ions to hypochlorite. In the new process, the hypochlorite solution is added to the water to be treated, prior to UV irradiation. The UV light produces highly reactive hydroxyl radicals that destroy small organic molecules in the feedstream. In pilot tests at industrial and municipal water treatment facilities, the process has achieved complete removal of trichloroethylene (TCE) from a starting concentration of 15 ppb [parts per billion], says Rivera. The process has also attained a 65% removal of 1,4-dioxane from contaminated groundwater (from an initial 8 ppb),…
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