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J.Health Sci., 48(6), 473-479, 2002
Science of Bamboo Charcoal: Study on Carbonizing Temperature of Bamboo Charcoal and Removal Capability of Harmful Gases
Takashi Asada,a, b Shigehisa Ishihara,c Takeshi Yamane,d Akemi Toba,e Akifumi Yamada,a and Kikuo Oikawa*, b
aNagaoka University of Technology, Kamitomioka-cho 1603-1, Nagaoka, Niigata 940-2188, Japan, bDepartment of Environmental and Safety Sciences, Niigata University of Pharmacy and Applied Life Sciences, Faculty of Applied Life Sciences, Higashijima 265-1, Niitsu, Niigata 956-8603, Japan, cProfesser Emeritus of Kyoto University, Tenjin, 3-23-12 Nagaoka-kyo, Kyoto 617-0824, Japan, dKankyo Techno Consul, Kojidai 3-18-7, Nishi-ku, Kobe 651-2273, Japan, and eObama Bamboo Charcoal Product Association, Mizutori 4-10-32, Obama, Fukui 917-0093, Japan
We examined the relationship between the carbonizing temperature of bamboo carbide made from Moso bamboo (Phyllostachys pubescens) and the removal effect of harmful gases and odorants, and the use of a bamboo charcoal as a countermeasure for "Sick Building Syndrome" or "Chemical Sensitivity" and the use as a deodorant. With regard to the carbonizing temperature of the bamboo charcoal, a temperature sensor was installed inside each bamboo material and the carbonizing temperature was controlled at 500, 700 and 1000°C. The removal effect was tested for formaldehyde, toluene and benzene that are known to cause "Sick Building Syndrome" or "Chemical Sensitivity" and for ammonia, indole, skatole and nonenal as odorants. The formaldehyde removal effect was only slightly different in the charcoal at all the carbonizing temperatures. The benzene, toluene, indole, skatole and nonenal removal effect were the highest for the bamboo charcoal carbonized at 1000°C and tended to increase as the carbonizing temperature of the bamboo charcoal increased. The removal effect for ammonia was the highest on the bamboo charcoal carbonized at 500°C. It is concluded that the effective carbonizing temperature is different for each chemical, and a charcoal must be specifically selected for use as an adsorbent or deodorant.
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