Removal of Cesium Using Cobalt-Ferrocyanide-Impregnated Polymer-Chain-Grafted Fibers

Ishihara, Ryo; Fujiwara, Kunio; Harayama, Takato; Okamura, Yoshihiro; Uchiyama, Seiichi; Sugiyama, Mai; Someya, Taka Aki; Amakai, Wataru; Umino, Satoshi; Ono, Tsubasa; Nide, Aguru; Hirayama, Yuya; Baba, Tsukasa; Kojima, Takashi; Umeno, Daisuke; Saito, Kyoichi; Asai, Shiho; Sugo, Takanobu

doi:10.1080/18811248.2011.9711817

Cited by 45 publications

(5 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In particular, decontamination technology using zeolite and Prussian blue was employed in highly contaminated areas around the power plant [6][7][8]. However, in the widespread areas with a low concentration of contaminants in the water system, such as forests and agricultural land, inexpensive and manageable adsorption materials are considered more suitable for decontamination.…”

Section: Introductionmentioning

confidence: 99%

Mechanism of Cesium Adsorption by Carbonized Rice Hull and Beech Sawdust

Miura

2018

Separations

View full text Add to dashboard Cite

This study used the results of breakthrough experiments to elucidate the mechanism of cesium adsorption on carbonized rice hull and beech sawdust. The shape of the breakthrough curves and the substance eluted from the carbonized rice hull and beech sawdust were investigated for various flow speeds and concentrations of the solute through the adsorbent layer. The ratio of the Cs concentration at the column outlet (C) to that at the inlet (C 0 ), C/C 0 , was calculated to evaluate the mechanism. It was found that carbonized rice hull could slowly adsorb Cs as the Cs solution passed through the fixed-bed layer. On the other hand, beech sawdust could rapidly adsorb Cs upon contact with the Cs solution. It was, therefore, suggested that the two materials adsorbed Cs through an ion-exchange reaction with potassium on their respective surfaces. Moreover, the shape of the breakthrough curve of beech sawdust changed as the Cs concentration at the column inlet was varied. This phenomenon was presumably caused by a factor other than the swelling or contraction of the adsorption layer. Further analysis revealed that the breakthrough curve of beech sawdust is indicative of an overshoot phenomenon when cesium was adsorbed by beech sawdust.

show abstract

Section: Introductionmentioning

confidence: 99%

Mechanism of Cesium Adsorption by Carbonized Rice Hull and Beech Sawdust

Miura

2018

Separations

View full text Add to dashboard Cite

show abstract

“…However, for the purpose of cesium-ion removal from the river or sea water, these adsorbents are not suitable because they are particle form and their collection from the contaminated water is not easy. A precipitate of insoluble cobalt ferrocyanide (CoFC) was formed in the polymer chain grafted onto a commercially available nylon 6 fiber [62]. Potassium metal ferrocyanide was reported as a selective inorganic adsorbent for cesium [57,63].…”

Section: Immobilization Of Precipitate Using Charged Graft Chainmentioning

confidence: 99%

Recent Progress in Charged Polymer Chains Grafted by Radiation-Induced Graft Polymerization; Adsorption of Proteins and Immobilization of Inorganic Precipitates

Ishihara

Asai

Saito

2020

QuBS

Self Cite

View full text Add to dashboard Cite

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.

show abstract

“…However, the solubility of metal hexacyanoferrates in water implies that they are embedded into the adequate insoluble solid supports (Ishihara et al . ).…”

Section: Introductionmentioning

confidence: 97%

Remediation of pharmaceutical contaminated water by use of magnetic functionalized metal organic framework. Physicochemical study of doxycycline adsorption

Naeimi

Faghihian

2018

Water & Environment J

View full text Add to dashboard Cite

The presence of pharmaceutical pollutant, doxycycline (DOC) in water and waste streams has negative impact on the environment. In this research, metal organic framework was synthesized and functionalized by potassium nickel ferrocyanide (KNiFC). After characterisation, the functionalized adsorbent was used for removal of DOC from aqueous solutions. The adsorbent containing 80% of KNiFC exhibited the high adsorption capacity of 100 mg/g. The adsorption process was kinetically fast and the equilibration was established within 30 min. The used adsorbent retained 90% of its initial capacity after regeneration. The magnetic susceptibility of the adsorbent measured by VSM technique was 35 emu/g and sufficient for separation of the used adsorbent by external magnetic field. Isotherm models including Langmuir, Freundlich, Tempkin, Redlich‐Peterson, and Sips were applied to correlate the experimental equilibrium data. To evaluate the fitness of the isotherm equations error analysis methods, residual root mean square error and average relative error were used.

show abstract

Removal of Cesium Using Cobalt-Ferrocyanide-Impregnated Polymer-Chain-Grafted Fibers

Cited by 45 publications

References 8 publications

Mechanism of Cesium Adsorption by Carbonized Rice Hull and Beech Sawdust

Mechanism of Cesium Adsorption by Carbonized Rice Hull and Beech Sawdust

Recent Progress in Charged Polymer Chains Grafted by Radiation-Induced Graft Polymerization; Adsorption of Proteins and Immobilization of Inorganic Precipitates

Remediation of pharmaceutical contaminated water by use of magnetic functionalized metal organic framework. Physicochemical study of doxycycline adsorption

Contact Info

Product

Resources

About