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Takahashi, Manabu*; Tanaka, Kazuya*; Tamada, Masao; Aoi, Toru*
Kankyo Kogaku Kenkyu Rombunshu, Vol.41, p.229 - 235, 2004/11
Fibrous metal adsorbent having iminodiacetic acid was synthesized by radiation-induced grafting glycidyl methacrylate on nonwoven fabric and subsequent chemical treatment. The degree of grafting calculated by increasing weight after grafting reached 170 % for reaction time of 2h at 40 
C. The adsorption characteristics of ferric and manganese ions were evaluated by using the resulting adsorbent with 2.1 mmol/g-adsorbent function group of iminodiacetic acid. Each distribution coefficient of ferric and manganese ion deceased with increase of another coexist ion. Both ferric and manganese ions were completely removed by the adsorbent column at the space velocity of 1000h
. Adsorption capacities of both ions were reduced to 80% after 5 times reputation of adsorption and desorption.
Tamada, Masao
Kankyo Shigen Kogaku, 51(2), p.99 - 101, 2004/04
Fibrous chelate adsorbents have been synthesized by radiation-induced graft polymerization onto polyethylene nonwoven fabric. Graft polymerization was induced by electron beam irradiation to the trunk polymer. Then, irradiated trunk polymer was contacted with reactive monomer having function of chelate agent or its precursor. The precursor was chemically converted to chelate agent. The resulting fibrous chelate adsorbent gave the high space velocity more than 500 h in removal of lead from its solution. Such adsorbent was applied to the removal of cadmium from scallop processing waste and the removal of lead from the contaminated water which was produced by washing the inside of incinerator.
Jo, Akinori*; Kugara, J.*; Trobradovic, H.*; Yamabe, Kazunori*; Sugo, Takanobu; Tamada, Masao; Kume, Tamikazu
Industrial & Engineering Chemistry Research, 43(7), p.1599 - 1607, 2004/03
Times Cited Count：28 Percentile：67.34(Engineering, Chemical)Fibrous iminodiacetic acid cheating cation exchangers were derived from chloromethylstyrene radiation-grafted polyethylene-coated polypropylene filamentary fiber and its nonwoven cloth. Ligand contents and acid capacities of the resulting cation exchangers were ca. 2 mmol/g and ca. 4 mmol/g for the filamentary fiber and for the non-woven cloth, respectively. The selectivity sequence of nonwoven cloth shape for dialect metal ions is Mg(II) 
Ca(II) 
Co(II) Zn(II) Cd(II) Ni(II) Pb(II) Cu(II). Capacities in mmol/g at pH 5 were Ca(II) 0.91, Mg(II) 0.98, Cd(II) 1.5, Ni(II) 1.5, Pb(II) 1.6, Cu(II) 1.8. Column mode for filamentary fiber shape revealed that breakthrough capacities for Cu(II) (ca. 1 mmol/g) were not dependent on flow rates up to 200 300 h in space velocity.
Basuki, F.*; Seko, Noriaki; Tamada, Masao; Sugo, Takanobu; Kume, Tamikazu
Nihon Ion Kokan Gakkai-Shi, 14(Suppl.), p.209 - 212, 2003/00
Radiation induced graftpolymerization is a sophisticated tool for introducing the aiming functional group into the conventional polymer. Adsorbent having phosphoric acid was directly synthesized by grafting methacrylate monomer having phosphoric acid onto polyethylene nonwoven fabric. Degree of grafting, which was estimated by increment weight after grafting, reached 185 % when the 10 % monomer in the mixture of 10 % methanol and 90 % water was reacted with 200 kGy-irradiated polyethylene nonwoven fabric. The resulting adsorbent revealed that adsorption capacities were 3 mmol/g-adsorbent for Pb and Cd. The removal of these metals could be performed with space velocity of 250 h.
Kugara, J.*; Trobradovic, H.*; Jo, Akinori*; Sugo, Takanobu; Tamada, Masao; Katakai, Akio
Nihon Ion Kokan Gakkai-Shi, 14(Suppl.), p.77 - 80, 2003/00
Chloromethylstyrene-grafted polyethylene-coated polypropylene fiber (0.9 denier) was functionalized by reaction with diethyl iminodiacetate and hydrolysis of the ester introduced. An acid capacity of the resulting chelating fiber (FIDA-f) was 4.3 meq/g. Although a maximum permissible flow rate of feeds was depressed with an increase in the conditioning pH of the FIDA-f column, breakthrough profiles of Pb(II) were independent of the flow rate of feeds up to 800/h in space velocity (SV). The usefulness of FIDA-f was demonstrated by quantitative removal of Pb(II) from 600 bed volumes of a Pb(II)-spiked river water (5 ppm) at a flow rate of SV 400/h.
Jo, Akinori*; Okada, Kenji*; Nakao, Mitsuhiro*; Sugo, Takanobu; Tamada, Masao; Katakai, Akio
Nihon Ion Kokan Gakkai-Shi, 14(Suppl.), p.69 - 72, 2003/00
The titled bifunctional fiber (FVCPS-f) were prepared by treating chloromethylated vinylbiphenyl-grafted polyethylene-coated polypropylene fiber (0.9 denier, length 3.8 cm) with triethyl phosphite, chlorosulfonic acid, and conc. hydrochloric acid, in successive. Phosphorus and sulfur contents of FVCPS-f were 1.8 and 0.7 mmol/g, respectively (acid capacity 4.2 meq/g). Its breakthrough capacity (BC) for Fe(III) gradually decreased with an increase in flow rate of feeds from 20/h to 1000/h in space velocity (SV); for instance, its BC at a SV 1000/h was 0.12 mmol/g, whereas both a commercially available phosphonate resin and a monofunctional phosphonate fiber were not able to give practically meaningful BC at such an extremely high flow rate.
Katakai, Akio; Kasai, Noboru; Tamada, Masao; Hasegawa, Shin; Seko, Noriaki; Kawabata, Yukiya*; Onuma, Kenji*; Takeda, Hayato*; Sugo, Takanobu
JAERI-Tech 2002-040, 79 Pages, 2002/03
JAERI-Tech-2002-040.pdf:8.62MB
The present report dealt with experimental methods of adsorbents synthesis, recovery, elution, analysis in experimental equipment for recovery of rare metals from seawater to evaluate performance of the adsorbent synthesized by radiation-induced graft-polymerization. In the adsorbent synthesis, monomers of acrylonitrile and methacryl acid were continuously co-grafted into polymer nonwoven fabric irradiated with electron beam. The grafted nonwoven fabric was amidoximated and treated with alkaline solution in batch processing. The obtained adsorbent fabrics which were cut into 116 sheets of the square, 160 mm 
290 mm, were alternatively stacked with spacers to make an adsorbent cassette. In recovery process, a large-sized cage packing 144 pieces of the adsorbent cassette was dipped into sea in the depth of 20 m by using an experimental marine equipment. In the case of a small-sized cage, there are 36 adsorbent cassettes in it. In elution step, first, marine animals which were adhered on the adsorbent cassette were washed out immediately after the adsorbent cassettes were recovered from sea. From every 72 adsorbent cassettes packed into elution unit, second, alkaline and rare metals were fractionally eluted by changing acid concentration in fractional elution equipment. The eluted metals were adsorbed onto a commercial chelate resin to transport them to purificatory factory. Concentrations of metals in eluent and waste solution were analyzed with inducticely coupled plasma atomic emission and mass spectrometry (ICP-AES and ICP-MS). The rare metal distribution in the adsorbent was evaluated by using the same analytical methods.
Katakai, Akio; Seko, Noriaki; *; *; Sugo, Takanobu
Nihon Kaisui Gakkai-Shi, 53(3), p.180 - 184, 1999/06
no abstracts in English
Katakai, Akio; Seko, Noriaki; *; *; Sugo, Takanobu
Nihon Genshiryoku Gakkai-Shi, 40(11), p.878 - 880, 1998/00
Times Cited Count：24 Percentile：85.15(Nuclear Science & Technology)no abstracts in English
; ; ; Kaetsu, Isao
Biotechnol.Bioeng., 28, p.1227 - 1232, 1986/00
no abstracts in English
