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J.Health Sci., 50(2), 148-153, 2004
Comparison of Removal Efficiencies for Ammonia and
Amine Gases between Woody Charcoal and Activated Carbon
Tsutomu Iyobe,*, a Takashi
Asada,b Kuniaki
Kawata,a and Kikuo
Oikawaa
aDepartment of Environmental and Safety Sciences, Niigata
University of Pharmacy and Applied Life Science, Faculty of Applied
Life Sciences, Higashijima 265-1, Niitsu, Niigata 956-0841,
Japan and bNagaoka University of Technology, Kamitoioka-cho
1603-1, Nagaoka, Niigata 940-2188, Japan
The removal efficiency of NH3,
(CH3)NH2,
(CH3)2NH and
(CH3)3N into woody charcoal
carbonized at 500°C and activated carbon was determined
by the attenuation of their concentrations in the 5 l
bags at cool (5°C) and room temperature (20°C). A discussion follows on the deodorization performance
against four gases with attention to the physical and
chemical characteristics of adsorbent surfaces. It was
found that the high acidity of woody charcoal surface was more suitable for the adsorption of
NH3 and (CH3)NH2 gases than the activated carbon under both
temperatures, and the activated carbon having larger
micro, meso pore volumes following an increase in
specific surface area showed higher capacity for
(CH3)3N gas adsorption than the woody charcoal.
Also the activated carbon is more suitable for
(CH3)2NH gas adsorption than the woody charcoal
at 5°C, but its removal efficiency using the activated
carbon is lower than the woody charcoal at 20°C. Much acidic functional groups on the adsorbent has
high adsorption potential just like chemical
adsorption is necessary to enhancement of
(CH3)2NH gas at 20°C.
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