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Hoshina, Hiroyuki; Kasai, Noboru; Shibata, Takuya*; Aketagawa, Yasushi*; Takahashi, Makikatsu*; Yoshii, Akihiro*; Tsunoda, Yasuhiko*; Seko, Noriaki
Radiation Physics and Chemistry, 81(8), p.1033 - 1035, 2012/08
Times Cited Count：4 Percentile：31.8(Chemistry, Physical)Takigami, Machiko*; Nagasawa, Naotsugu; Hiroki, Akihiro; Kasai, Noboru; Yoshii, Fumio; Tamada, Masao; Takigami, Shoji*; Shibata, Takuya*; Aketagawa, Yasushi*; Ozaki, Masuo*
Transactions of the Materials Research Society of Japan, 35(3), p.647 - 650, 2010/09
There are many livestock farmers in Gunma Prefecture. Many of the farms are located under Mt. Akagi and Haruna, which attract tourists. Furthermore, rivers around the mountains are source of water supply to metropolitan area. Therefore, the waste treatments are very important. Regulations of smell and COD (chemical oxygen demand) are severe in Gunma Prefecture. Although there is no regulation for color of drain water, color in secondary treated water from livestock urine waste has been one of the major concerns for livestock farmers. The color is a metabolite of microorganisms and not easy to be removed. People have tried to remove the color by ozone treatment, absorption using activated carbon or soils. An absorbent was prepared by radiation grafting; fibers were irradiated with 
Co 
-rays and some kinds of monomers were grafted onto the fibers. The absorbent thus prepared were used to decolorize the secondary treated water. The color and COD were removed by the absorbent, however, COD removal was more difficult than decolorization. Degree of grafting (weight increase expressed in % by grafting reaction to initial weight of the fiber), treated water/absorbent ratio, flow rate of treated water, and direction of flow affected color and COD removal. The used absorbent could be used repeatedly after washing.
Seko, Noriaki; Yoshii, Akihiro*; Tsunoda, Yasuhiko*
Hoshasen To Sangyo, (123), p.15 - 18, 2009/09
Purification of circulating water for cooling system in building is important task from the viewpoint of economy and environmental preservation. The circulating water was purified by the adsorbent which was synthesized by radiation induced graft polymerization of phosphoric acid mono and di ester monomer onto a polyethylene nonwoven fabric. The chelating unit of phosohric acid in the synthesized adsorbent had high affinity to Fe(III). In this presentation, purification system for 100 ton circulating water was assembled by stack of graft adsorbents and electromagnetic equipment. In the preliminal experiment, it was succeeded that Fe(III) in the 90 ton circulating water could be reduced from 0.3 to 0.1 mg/L during only 2 months operating of this system.
Takigami, Machiko*; Amada, Haruyo*; Nagasawa, Naotsugu; Hiroki, Akihiro; Kasai, Noboru; Yoshii, Fumio; Tamada, Masao
Transactions of the Materials Research Society of Japan, 33(4), p.849 - 852, 2008/12
Shortage of phosphorus becomes a serious problem in the world. The removal of phosphorus in swine urine is a big concern for the environmental conservation. To solve both problems, absorbent to absorb phosphorus in swine urine was developed using carboxymethyl cellulose (CMC) and Iron. The gel formation proceeded instantaneously when CMC and Iron (III) chloride were mixed, while gel was not formed immediately when Iron (II) chloride was used. Oxidation of Iron (II) to Iron (III) occurs gradually in Iron (II) aqueous solution. However, addition of CMC to the Iron (II) solution promoted the oxidation to form gel. The rate of gel formation could be controlled by addition of acid to CMC-Iron (II) mixture. The resultant gel absorbed phosphorus in swine urine. The absorption was about 97% in swine urine containing 78 mg/L of phosphorus.
Takigami, Machiko*; Amada, Haruyo*; Nagasawa, Naotsugu; Hiroki, Akihiro; Kasai, Noboru; Yoshii, Fumio; Tamada, Masao
JAEA-Review 2008-055, JAEA Takasaki Annual Report 2007, P. 44, 2008/11
no abstracts in English
Hiroki, Akihiro; Nagasawa, Naotsugu; Yagi, Toshiaki; Kume, Tamikazu; Yoshii, Fumio; Tamada, Masao
JAEA-Review 2006-042, JAEA Takasaki Annual Report 2005, P. 56, 2007/02
Cooperative research between Vietnam Atomic Energy Commission (VAEC) and JAEA has been performed over a period of six years. In the cooperative research, natural polysaccharides such as alginate, chitin, and chitosan were irradiated by -ray to produce various functional materials. It was found that the alginate and the chitosan degraded with -irradiation were effective as a growth promoter for rice and carrot and an anti-bacterial agent, respectively. On the other hand, the hydrogels obtained by -irradiating carboxymethylchitosan aqueous solution in paste-like state showed a high adsorption capacity for Cu (II) ions as well as the anti-bacterial activity.
; ; Makino, Akihiro; Murano, Toru*; Wakabayashi, Hiroaki*; Yoshii, Koji*
PNC TN841 77-06, 76 Pages, 1976/03
no abstracts in English
Nagasawa, Naotsugu; Takigami, Machiko*; Amada, Haruyo*; Hiroki, Akihiro; Kasai, Noboru; Yagi, Toshiaki*; Yoshii, Fumio; Tamada, Masao
no journal, ,
no abstracts in English
Hiroki, Akihiro; Nagasawa, Naotsugu; Iwanaga, Shigeru; Yoshii, Fumio; Taguchi, Mitsumasa; Tamada, Masao
no journal, ,
no abstracts in English
Hiroki, Akihiro; Nagasawa, Naotsugu; Taguchi, Mitsumasa; Yoshii, Fumio
no journal, ,
Seko, Noriaki; Hoshina, Hiroyuki; Kasai, Noboru; Takahashi, Makikatsu*; Yoshii, Akihiro*; Tsunoda, Yasuhiko*; Shibata, Takuya*; Aketagawa, Yasushi*
no journal, ,
Seko, Noriaki; Hoshina, Hiroyuki; Kasai, Noboru; Takahashi, Makikatsu*; Yoshii, Akihiro*; Tsunoda, Yasuhiko*; Shibata, Takuya*; Aketagawa, Yasushi*
no journal, ,
no abstracts in English
Seko, Noriaki; Hoshina, Hiroyuki; Kasai, Noboru; Takahashi, Makikatsu*; Tsunoda, Yasuhiko*; Yoshii, Akihiro*; Shibata, Takuya*; Aketagawa, Yasushi*
no journal, ,
Hoshina, Hiroyuki; Kasai, Noboru; Takahashi, Makikatsu*; Shibata, Takuya*; Aketagawa, Yasushi*; Yoshii, Akihiro*; Tsunoda, Yasuhiko*; Seko, Noriaki
no journal, ,
no abstracts in English
Hoshina, Hiroyuki; Kasai, Noboru; Shibata, Takuya; Takahashi, Makikatsu*; Aketagawa, Yasushi*; Yoshii, Akihiro*; Tsunoda, Yasuhiko*; Seko, Noriaki
no journal, ,
no abstracts in English
Hoshina, Hiroyuki; Kasai, Noboru; Shibata, Takuya; Takahashi, Makikatsu*; Aketagawa, Yasushi*; Yoshii, Akihiro*; Tsunoda, Yasuhiko*; Seko, Noriaki
no journal, ,
no abstracts in English
