Materials and Life Science Experimental Facility (MLF) at the Japan Proton Accelerator Research Complex, 2; Neutron scattering instruments

Nakajima, Kenji; Kawakita, Yukinobu; Ito, Shinichi*; Abe, Jun*; Aizawa, Kazuya; Aoki, Hiroyuki; Endo, Hitoshi*; Fujita, Masaki*; Funakoshi, Kenichi*; Gong, W.*; et al.

Quantum Beam Science (Internet), 1(3), p.9_1 - 9_59, 2017/12

https://doi.org/10.3390/qubs1030009

The neutron instruments suite, installed at the spallation neutron source of the Materials and Life Science Experimental Facility (MLF) at the Japan Proton Accelerator Research Complex (J-PARC), is reviewed. MLF has 23 neutron beam ports and 21 instruments are in operation for user programs or are under commissioning. A unique and challenging instrumental suite in MLF has been realized via combination of a high-performance neutron source, optimized for neutron scattering, and unique instruments using cutting-edge technologies. All instruments are/will serve in world-leading investigations in a broad range of fields, from fundamental physics to industrial applications. In this review, overviews, characteristic features, and typical applications of the individual instruments are mentioned.

Preparing of novel fibrous ligand exchange adsorbent for rapid column-mode trace phosphate removal from water

Awual, M. R.; Shenashen, M. A.*; Jo, Akinori*; Shiwaku, Hideaki; Yaita, Tsuyoshi

Journal of Industrial and Engineering Chemistry, 20(5), p.2840 - 2847, 2014/09

AA2013-1107.pdf:0.32MB

https://doi.org/10.1016/j.jiec.2013.11.016

Efficient arsenic(V) removal from water by ligand exchange fibrous adsorbent

Awual, M. R.; Shenashen, M. A.*; Yaita, Tsuyoshi; Shiwaku, Hideaki; Jo, Akinori*

Water Research, 46(17), p.5541 - 5550, 2012/11

https://doi.org/10.1016/j.watres.2012.07.038

Anion exchange fibres derived from chloromethylstyrene grafted POLYOLEIN FIBRES for rapid column-mode removal of nitrate in water

Go, Yasuhiro*; Yoshida, Hiromi*; Jo, Akinori*; Tamada, Masao; Katakai, Akio

Proceedings of 2008 Conference on Ion Exchange Technology (IEX 2008), p.353 - 361, 2008/07

Although granular anion exchange resins are useful for column-mode removal of nitrate in water, sizes of granular resins used in industrial scale columns are ca. 0.5 mm to reduce pressure loss in column operations. Since large granular resins bring down adsorption kinetics, it is difficult to supply water polluted with nitrate to granular resin packed columns at extremely high flow rates more than 1000 h in space velocity (SV). In this work, we have prepared an anion exchange fiber named FBDA, which rapidly takes up nitrate in column-mode even at the flow rate of feed of 3000 h in SV. FBDA was prepared by electron beam irradiation induced liquid phase graft polymerization of chloromethylstyrene (CMS) onto polyethylene-coated polypropylene fiber (PPPE; 1.5 denier) and the subsequent quaternization of the CMS-grafted fiber with n-butyldimethylamine (BDA). The resulting BDA-fixed fiber (FBDA) has anion exchange capacity of 2.2 meq/g. To the column (i.d. 1.3 cm) containing 2.0 mL wet FBDA, 1 mM nitrate feeding solutions in the absence and presence of a competing anion was fed to the column at given flow rates. In the absence of a competing anion, shapes of breakthrough profiles of nitrate are independent of the flow rates from 1000 to 3000 h in SV, giving the constant breakthrough capacity for nitrate as high as 1.1 mmol/g. Effect of chloride and sulfate was tested at the flow rate of 1000 h. In the presence of 1 mM and 5 mM chloride, breakthrough capacities for nitrate were reduced to 0.83 and 0.48 mmol/g, respectively. However, equimolar sulfate reduced the breakthrough capacity down to 0.43 mmol/g. Thus, the presented FBDA is useful for rapid purification of water contaminated with low concentration levels of nitrate, so long as concentrations of chloride and sulfate are nearly equal orders as those in most river waters. Almost the same results were also obtained in case of the triethylamine-fixed fiber named FTEA.

Zirconium(IV) loaded bifunctional fiber containing both phosphonate and sulfonate as arsenate adsorbent

Awual, Md. R.*; Jo, Akinori*; Tamada, Masao; Katakai, Akio

Nihon Ion Kokan Gakkai-Shi, 18(4), p.422 - 427, 2007/10

https://doi.org/10.5182/jaie.18.422

Fibrous arsenate adsorbent was prepared by loading Zr(IV) onto a bifunctional cation exchange fiber containing both phosphonate and sulfonate. This bifuctional cation exchange fiber was prepared by phosphorylation and sulfonation of the precursory fiber, which was obtained by co-graft polymerization of chloromethylstyrene and styrene onto polyethylene coated polypropylene fiber. Performances of the Zr(IV) loaded fiber as arsenate adsorbent was studied in columnar mode. The column packed with Zr(IV) loaded fiber removed arsenate from a weakly acidic pH solution containing 0.016 mM arsenate (1.2 mg of As dm) even at a flow rate of 200 h in space velocity. Sodium salts of chloride, nitrate and sulfate did not interfere with uptake of arsenate but they slightly enhanced arsenate uptake. Adsorbed arsenate was quantitatively eluted with aqueous sodium hydroxide, and then the column was able to be regenerated by contact with dilute sulfuric acid for the next arsenate adsorption operation.

Development and application of fiberous bifunctional phosphonate-sulfonate cation exchanger

Okada, Kenji*; Seko, Noriaki; Tamada, Masao; Jo, Akinori*

JAEA-Review 2006-042, JAEA Takasaki Annual Report 2005, P. 44, 2007/02

https://jopss.jaea.go.jp/pdfdata/JAEA-Review-2006-042.pdf

no abstracts in English

Fibrous iminodiacetic acid chelating cation exchangers with a rapid adsorption rate

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

https://doi.org/10.1021/ie030146h

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.

Bifunctional phosphonate fiber derived from vinylbiphenyl-grafted polyethylene-coated polypropylene fiber for extremely rapid removal of iron(III)

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.

Development of an anion exchange fiber having high selectivity to phosphate and arsenate species

Urata, Shinya*; Awual, Md. R.*; Jo, Akinori*; Katakai, Akio; Tamada, Masao

no journal, , 

no abstracts in English

The Metal ion adsorption properties of a fibrous adsorbent containing iminodiacetic acid groups derived from vinyl benzyl glycidyl ether-grafted polyolefin

Ikegami, Aya*; Jo, Akinori*; Katakai, Akio; Tamada, Masao

no journal, , 

no abstracts in English