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Tanaka, Ryota*; Ishihara, Ryo*; Miyoshi, Kazuyoshi*; Umeno, Daisuke*; Saito, Kyoichi*; Asai, Shiho; Yamada, Shinsuke*; Hirota, Hideyuki*
Separation Science and Technology, 49(1), p.154 - 159, 2014/01
Times Cited Count:4 Percentile:16.87(Chemistry, Multidisciplinary)Wada, Go*; Ishihara, Ryo*; Miyoshi, Kazuyoshi*; Umeno, Daisuke*; Saito, Kyoichi*; Asai, Shiho; Yamada, Shinsuke*; Hirota, Hideyuki*
Solvent Extraction and Ion Exchange, 31(2), p.210 - 220, 2013/02
Times Cited Count:2 Percentile:12.3(Chemistry, Multidisciplinary)A crosslinked chelating porous sheet was prepared by cografting ethylene glycol dimethacrylate (EGDMA) with glycidyl methacrylate onto an electron-beam-irradiated porous polyethylene sheet, followed by the introduction of an iminodiacetate group. At a molar percentage of EGDMA of 1.0 mol%, the sheet exhibited a maximum dynamic binding capacity for copper ions of 0.93 mmol/g, while the equilibrium binding capacity remained the same (1.2 mmol/g) as that of a non-crosslinked chelating porous sheet. The crosslinking of the grafted chain causes copper ions to lower their diffusion rate along the sheet thickness driven by the gradient of the amount of copper ions adsorbed.
Ishihara, Ryo*; Asai, Shiho; Otosaka, Shigeyoshi; Yamada, Shinsuke*; Hirota, Hideyuki*; Miyoshi, Kazuyoshi*; Umeno, Daisuke*; Saito, Kyoichi*
Solvent Extraction and Ion Exchange, 30(2), p.171 - 180, 2012/02
Times Cited Count:8 Percentile:31.74(Chemistry, Multidisciplinary)Wada, Go*; Ishihara, Ryo*; Miyoshi, Kazuyoshi*; Umeno, Daisuke*; Saito, Kyoichi*; Asai, Shiho; Yamada, Shinsuke*; Hirota, Hideyuki*
Nihon Ion Kokan Gakkai-Shi, 22(2), p.47 - 52, 2011/01
no abstracts in English
Miyazawa, Tadashi*; Asari, Yuki*; Miyoshi, Kazuyoshi*; Umeno, Daisuke*; Saito, Kyoichi*; Nagatani, Takeshi*; Yoshikawa, Naohito*; Motokawa, Ryuhei; Koizumi, Satoshi*
Nihon Kaisui Gakkai-Shi, 64(6), p.360 - 365, 2010/12
Tanaka, Ryota*; Ishihara, Ryo*; Miyoshi, Kazuyoshi*; Umeno, Daisuke*; Saito, Kyoichi*; Asai, Shiho; Yamada, Shinsuke*; Hirota, Hideyuki*
Reactive and Functional Polymers, 70(12), p.986 - 990, 2010/12
Times Cited Count:7 Percentile:29.18(Chemistry, Applied)Asai, Shiho; Kimura, Takaumi; Miyoshi, Kazuyoshi*; Saito, Kyoichi*; Yamada, Shinsuke*; Hirota, Hideyuki*
Nihon Ion Kokan Gakkai-Shi, 21(3), p.334 - 339, 2010/07
Asai, Shiho; Miyoshi, Kazuyoshi*; Saito, Kyoichi*
Analytical Sciences, 26(6), p.649 - 658, 2010/06
Times Cited Count:11 Percentile:9.82(Chemistry, Analytical)A preparation of novel porous sheet designed for solid-phase extraction (SPE) and a comparison of the preconcentration performance of metal ions with conventional sorbents are described in this review. A porous sheet (MAPS) was modified into an sorbent used for solid-phase extraction, by radiation-induced graft polymerization. Ion-exchange and chelating groups were immobilized onto polymer chains grafted to the MAPS. Also, extractants were impregnated via hydrophobic interaction with long alkyl chains introduced into the grafted polymer chains of the MAPS. The applicability of the resultant modified MAPSs was demonstrated by adopting them to the analyses of real samples.
Asai, Shiho; Magara, Masaaki; Shinohara, Nobuo; Yamada, Shinsuke*; Nagai, Masanori*; Miyoshi, Kazuyoshi*; Saito, Kyoichi*
no journal, ,
A porous sheet with a diethylamino (DEA) group as anion-exchange group was prepared for achieving rapid separation of U and Pu. The epoxy group containing monomer, glycidyl methacrylate was grafted onto the surface of the porous sheet. The epoxy group of the poly-GMA graft polymer chain was converted into a DEA group. The amount of the DEA group was increased with increasing reaction time and leveled off at 3.4 mol/kg of the sheet. An iron solution as a model metal ion solution was forced to permeate through the pores of the DEA-introduced sheet (DEA sheet) at a permeation rate of 20 mL/min. The equilibrium adsorption capacity of the DEA sheet for Fe ions (FeCl) was calculated as 1.1 mol-Fe/kg-DEA sheet. This value is comparable to or higher than those of conventional anion-exchange resins. U and Pu in the sample solution were separated using the DEA sheet. Trace amounts of U (38.16 pg) and Pu (0.34 pg) were found to be successfully separated with the DEA sheet.
Asai, Shiho; Magara, Masaaki; Shinohara, Nobuo; Yamada, Shinsuke*; Nagai, Masanori*; Miyoshi, Kazuyoshi*; Saito, Kyoichi*
no journal, ,
The use of a column charged with an ion-exchange resin has been widely employed to separation of actinides. However, the use of the resin-packed column has a drawback in that a higher flow rate of the sample solution through the column results in a lower recovery. In order to overcome this drawback in the use of the conventional column, we prepared an anion-exchange cartridge charged with a diethylamino-group-containing porous disk. To evaluate the applicability, the binding efficiencies of U and Pu were determined at various flow rates. 5 mL of standard solution containing U and Pu was permeated through the anion-exchange cartridge at the flow rate raging from 0.3 to 80 mL/min. Adsorption efficiencies of U and Pu were 1.0 irrespective of the flow rate. This adsorption characteristic is advantageous over the conventional anion-exchange resin-packed column in that a higher flow rate of the sample solution, i. e., a shorter processing time of analysis, is achievable.
Asai, Shiho; Esaka, Fumitaka; Shinohara, Nobuo; Yamada, Shinsuke*; Nagai, Masanori*; Miyoshi, Kazuyoshi*; Saito, Kyoichi*
no journal, ,
no abstracts in English
Asai, Shiho; Esaka, Fumitaka; Shinohara, Nobuo; Hirota, Hideyuki*; Yamada, Shinsuke*; Miyoshi, Kazuyoshi*; Saito, Kyoichi*
no journal, ,
no abstracts in English
Asai, Shiho; Otosaka, Shigeyoshi; Tanaka, Ryota*; Miyoshi, Kazuyoshi*; Ishihara, Ryo*; Saito, Kyoichi*; Yamada, Shinsuke*; Hirota, Hideyuki*
no journal, ,
no abstracts in English
Asai, Shiho; Kimura, Takaumi; Miyoshi, Kazuyoshi*; Saito, Kyoichi*; Yamada, Shinsuke*; Hirota, Hideyuki*
no journal, ,
no abstracts in English
Tanaka, Ryota*; Ishihara, Ryo*; Miyoshi, Kazuyoshi*; Umeno, Daisuke*; Saito, Kyoichi*; Asai, Shiho; Yamada, Shinsuke*; Hirota, Hideyuki*
no journal, ,
A basic extractant Aliquat 336 dissolved in a mixture of ethanol and NaOH aqueous solution was impregnated to carboxydecanyl-thiol (CDT) group containing polymer chains grafted onto a porous sheet. The CDT group was introduced into the graft chain by a reaction of the epoxy group of poly-glycidyl methacrylate (GMA) chain grafted onto the porous sheet with 11-mercaptoundecanoic acid. The electrostatic interaction between the carboxyl moiety of the CDT group and the quaternary ammonium group of Aliquat 336 gave rise to a high-density impregnation of Aliquat 336. Palladium chloride (50 mg-Pd/L) in 1 M HCl was forced to permeate through the pores of the Aliquat 336-impregnated porous sheet. The binding efficiency, defined as the ratio of number of moles of palladium adsorbed to half the number of moles of impregnated Aliquat 336, was found to be 64%.