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Durability of plantinum bead oxidation catalyst for vehicle emission control
1974
Aoyama, H. | Ohuchi, H. | Nakamura, S. | Oi, A. | Horio, Y. | Suzuki, M. | Yamaki, N. (National Research Inst. for Pollution and Resources, Kawaguchi, Saitama (Japan))
Photochemical smog and ESR spectra of dust
1974
Minegishi, A. (Tokyo-to. Isotope Research Inst. (Japan)) | Shinozaki, Y. | Morishima, H.
Studies on the treatment of wastewaters from the towel dyeing industry
1975
Takechi, H. | Kagawa, S. | Senba, K. | Kurosaka, S. (Ehime-ken. Industrial Research Inst., Matsuyama (Japan))
Effect of the inorganic coagulant for the dyeing waste water treatment with ozone
1975
Yasutome, K. | Takiguchi, T. | Shimizu, S. | Nakano, S. | Sato, A. | Kayanuma, S. (Yamanashi-ken. Textile Research Inst., Fujiyoshida (Japan))
Treatment of waste water from deresinning process of coniferous wood
1975
Mitsui, I. (Nagano-ken. Industrial Research Inst. (Japan))
Hardening treatment of plating waste sludge with cement
1974
Soya, T. | Suyama, S. (Nagano-ken. Precision Industry Experiment Station, Okaya (Japan))
Detection of norovirus from food borne outbreaks of gastroenteritis in Nagano Prefecture [Japan]
2004
Tokutake, Y.(Nagano-ken. Research Inst. for Health and Pollution (Japan)) | Nakamura, Y. | Yokouchi, A. | Muramatsu, K. | Nishio, O.
Treatment of human excreta in mountainous area by anaerobic digestion and seepage spray method
2004
Suzuki, T.(Nagano-ken. Research Inst. for Health and Pollution (Japan)) | Murakami, R. | Ishikawa, T.
A research on a treatment system of human excreta provided for the use in mountainous areas was carried out. The system was composed of two treatment processes, an anaerobic digestion and a seepage spray process. Vertical distributions of chemical components were observed in the anaerobic digestion tank, because the top of the tank was covered with water permeable phase and rain water was penetrated into the tank. Comparing the amount of inflow into and of evapotranspiration from the system, about 70% of the inflow was overflowed from the seepage spray tank, under the assumption that the whole rain water fallen on the system was permeated into it.
Show more [+] Less [-]Behavior of bisphenol A in waste landfill leachate and changes of water quality in leachate treatment process
2004
Sasai, H.(Nagano-ken. Research Inst. for Health and Pollution (Japan)) | Hosoi, Y. | Oguchi, F. | Kawamata, S. | Ishikawa, T.
Seasonal variation in airborne aerosol components in the central mountainous area, Japan
2003
Satsumabayashi, H. (Nagano-ken. Research Inst. for Health and Pollution (Japan)) | Kawamura, M. | Katsuno, T. | Nishizawa, H. | Futaki, K. | Murano, K. | Ueda, H.
The seasonal variations of the chemical components in airborne aerosols in a mountainous area were investigated. Field observations were made at Happo at an altitude of 1,850m in the central mountainous region of Japan. Airborne aerosol was collected for 12hours or 24hours from May 1998 to September 1999 and the chemical components (Na+, Mg2+, K+, Ca2+, NH4+, Cl-, SO42-, NO3- and oxalic acid) in the aerosol were measured. In addition, gaseous pollutants, such as ozone and SO2 were monitored simultaneously. The concentrations of Na+ were much higher from autumn to spring than those in summer. Cl- increased in winter and the seasonal variation differed from Na+. The concentrations of Mg2+, K+ and Ca2+, especially Ca2+ increased in spring. It suggests that the increase in this Ca2+ concentration is based on the influence of Kosa aerosol (yellow sand) transported from continental Asia. The concentrations of SO42- and oxalic acid produced by photochemical reaction increased from spring to summer, and NH4+ which is the neutralization ingredient of sulfuric acid showed also the same seasonal variation. The concentration ratios of Cl-/Na+ were quite low compared with that of sea water. This is based on Cl- loss reaction. There was almost no influence of sea salt in the mountainous area, because most of K+, Ca2+ and SO42- were non-sea salt. The sulfate conversion ratio, i.e., SO42- -[S]/(SO2-[S] + SO42--[S]), was as high as 0.8 in summer. In summer and winter, when the concentration of SO42- was high, total equivalent concentration of anions (Cl-, NO3- and SO42-) was much higher than that of cations (Na+, NH4+, K+, Mg2+ and Ca2+), which suggests that a portion of the SO42- existed in the form of acidic aerosols such as H3SO4 and NH4HSO4. It suggests that a part of sulfuric acid produced by the photochemical reaction is transported to the mountainous area without being neutralized by alkali substances, such as NH3.
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