Development of returnable inorganic filter for air purification using a natural nanoporous material in Hokkaido.

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The honey-comb ceramics filter using the Wakkanai siliceous shale was developed. From the evaluation of the adsorption effect, it was found that this filter has a higher ability to the odor decrease of the trimethyl amine and the acetic acid. In addition, from the result of the GCMS analysis and a human sensory test, the high adsorption effect was recognized by using a real cooking smell such as the pork, the pacific saury and the garlic.