Showing posts with label inceneration. Show all posts
Showing posts with label inceneration. Show all posts

Friday, February 24, 2023

Phytoremediation of Contaminants > Dioxins












 

Dioxins

Treatment Technologies

When cleanup began at the Times Beach, Missouri Superfund site in the 1980s, rotary kiln incineration was the only fully demonstrated, commercially available and permitted technology for cleaning up dioxin in soil. Since then, additional remediation technologies for the cleanup of dioxin-contaminated soil and sediments have been researched and developed, but several of the accepted techniques still rely on thermal destruction, which is energy intensive. Heat-based destruction techniques for treating dioxin-contaminated soil and debris include incineration, thermal desorption, and vitrification. Incineration at temperatures above 1200°C is considered the most effective way of destroying dioxins. Thermal desorption, which operates at lower temperature range to vaporize dioxins, is also commonly used. A large-scale cleanup was completed in 2018 at the Bien Hoa Airport in Danang, Vietnam where nearly 95,000 m3 were excavated and treated with thermal desorption (USAID, 2018). Vitrification is largely a stabilization technique that uses very high temperatures to melt contaminated soil. When subsequently cooled, it forms a glassy mass that traps contaminants and reduces their mobility.  

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