Novel hollow fiber membrane for the removal of metal ion during permeation: preparation by radiation-induced cografting of a crosslinking agent with reactive monomer

1989 ◽  
Vol 28 (12) ◽  
pp. 1808-1812 ◽  
Author(s):  
Kyoichi Saito ◽  
Masaki Ito ◽  
Hideyuki Yamagishi ◽  
Shintaro Furusaki ◽  
Takanobu Sugo ◽  
...  
2003 ◽  
Vol 87 (10) ◽  
pp. 1646-1653 ◽  
Author(s):  
Mariano Grasselli ◽  
M. Laura Carbajal ◽  
Fumio Yoshii ◽  
Takanobu Sugo

2020 ◽  
Vol 4 (2) ◽  
pp. 20 ◽  
Author(s):  
Ryo Ishihara ◽  
Shiho Asai ◽  
Kyoichi Saito

Radiation-induced graft polymerization provides industrially superior functionalization schemes by selection of existing polymer substrates and design of graft chains. In this review, by a pre-irradiation method of the radiation-induced graft polymerization and subsequent chemical modifications, charged polymer chains grafted onto various components and shapes of the polymer substrates are described. The charged graft chains immobilized onto a porous hollow-fiber membrane captured proteins in multilayers via multipoint binding. A membrane onto which positively charged graft chains are immobilized, i.e., an anion-exchange porous hollow-fiber membrane, was commercialized in 2011 for the removal of undesirable proteins in the purification of pharmaceuticals. On the other hand, a membrane onto which negatively charged graft chains are immobilized, i.e., a cation-exchange porous hollow-fiber membrane, exhibited a low permeation flux for pure water; however, the prepermeation of an aqueous solution of magnesium chloride through the membrane restored the permeation flux because of ionic crosslinking of graft chains with magnesium ions. The charged graft chains provide a precipitation field for inorganic compounds such as insoluble cobalt ferrocyanide. The graft chains entangle or penetrate a precipitate owing to electrostatic interactions with the surface charge on the precipitate. Braids and wound filters composed of insoluble-cobalt-ferrocyanide-impregnated fibers are used for the removal of radiocesium from contaminated water at Tokyo Electric Power Co. (TEPCO) Fukushima Daiichi Nuclear Power Plant.


2006 ◽  
Vol 834 (1-2) ◽  
pp. 68-76 ◽  
Author(s):  
Luciana Cristina Lins de Aquino ◽  
Heloisa Ribeiro Tunes de Sousa ◽  
Everson Alves Miranda ◽  
Luciano Vilela ◽  
Sônia Maria Alves Bueno

2011 ◽  
Vol 233-235 ◽  
pp. 431-434
Author(s):  
Chun Fang Lai ◽  
Guo Liang Zhang ◽  
Xin Jiang Sheng ◽  
Hai Min Sun ◽  
Lu Sheng Xu ◽  
...  

Novel membrane contactors offer a number of important advantages over conventional dispersed phase contactors, including absence of emulsions, no flooding at high flow rates, no unloading at low flow rates, no density difference between fluids required, and surprisingly high interfacial area. Based on the former work of our group, this paper provides a general review of recent progress in the application of hollow fiber membrane contactors in liquid/liquid and gas/liquid separation and in the environmental waste treatment including VOCs and CO2 separation, metal ion recovery, and alcohol purification.


2006 ◽  
Vol 81 (3-4) ◽  
pp. 190-196 ◽  
Author(s):  
Hidetaka Kawakita ◽  
Kazuya Uezu ◽  
Satoshi Tsuneda ◽  
Kyoichi Saito ◽  
Masao Tamada ◽  
...  

2012 ◽  
Vol 27 (9) ◽  
pp. 951-955
Author(s):  
Chun-Li YANG ◽  
Qi-Ming XU ◽  
Ming GONG ◽  
Wei LIU

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