IWA Publishing

Water and soil remediation using cryogenic process

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Courtesy of IWA Publishing

Cryogenic process for surface water and soil remediation is a process that remove contaminants through condensation of chemicals with the used of cryogens depending on the temperature requirements for treatment (see Figures 1 through 3). The cryogens usually have very low temperatures below -180oC with normal boiling points, are as follows: liquid nitrogen (-196oC); liquid helium (-268.93oC); liquid oxygen (-182.95oC); and neon (-240oC). Other common refrigerants (i.e., freon, R507, and hydrogen sulfide) have higher temperatures.  Liquid nitrogen is mostly used in cryogenics around the globe.  In remediation, liquid nitrogen is very effective for removal of contaminants from the soil and surface water.  People are afraid to use liquid nitrogen for the environmental remediation because of a higher risk for potential explosion when it is not carefully design. Strategic planning and techniques can achieve success in remediation using cryogenic process with liquid nitrogen. It is very cost effective and energy efficient compared to other existing technologies.

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Customer comments

  1. By Sam Lord on

    Interesting article, thanks. Is this technology becoming more popular? Do you know who can design cryogenic soil and water remediation startegies?

  2. By David Burns on

    @Sam Lord thanks for your interest - it would be worth you contacting the author of this article, Anna Doro-on. She is a consultant and may be able to help with your query. Visit the full article and click on her name to contact her or leave a note on the Discussion page. Full article @ http://iwawaterwiki.org/xwiki/bin/view/Articles/Cryogenic_watercleanup?language=en