Almost Complete Removal of Trace Amount of Halogenated Organic Compounds in Water: An Approach by Use of a Combination of Water-Soluble Thiacalixarene and Ion-Exchange Resins

1999 ◽  
Vol 28 (8) ◽  
pp. 777-778 ◽  
Author(s):  
Nobuhiko Iki ◽  
Toyohisa Fujimoto ◽  
Taku Shindo ◽  
Katsuyoshi Koyama ◽  
Sotaro Miyano
Keyword(s):  
Ion Exchange ◽  
Organic Compounds ◽  
Trace Amount ◽  
Complete Removal ◽  
Water Soluble ◽  
Ion Exchange Resins ◽  
Halogenated Organic Compounds ◽  
Exchange Resins

scholarly journals Radiation resistance of organic compounds for LRW solidification

2021 ◽  
Vol 16 (3) ◽  
pp. 44-50
Author(s):  
E. E. Ostashkina ◽  
◽  
A. E. Savkin ◽  
Keyword(s):  
Ion Exchange ◽  
Organic Compounds ◽  
Radiation Resistance ◽  
Pilot Plant ◽  
Irradiation Dose ◽  
Epoxy Binder ◽  
Ion Exchange Resins ◽  
Polymer Compound ◽  
Exchange Resins ◽  
Kalinin Npp

Experiments were carried out to determine the radiation resistance of a bitumen compound produced based on genuine cubic residue from the Kalinin NPP using bitumen grades BND 60/90 and BND 90/130, polymer compounds based on spent ion exchange resins and spent inorganic sorbents. It was found that at an irradiation dose of 1·106 Gy, the volume of the bitumen compound increases to no more than 10 vol. %, which complies with the NP-019-15 requirements. The polymer compound based on spent ion-exchange resins from the testing of a pilot plant for resin conditioning directly in a disposal container by dewatering and impregnation with an epoxy binder, meets the

Embedding Procedure for Water Swollen Samples

1970 ◽  
Vol 28 ◽  
pp. 504-505
Author(s):  
Ann M. Thomas ◽  
Virginia Shemeley
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Ion Exchange ◽  
Structural Changes ◽  
Cross Linking ◽  
Ion Exchange Resins ◽  
Transmission Electron ◽  
First Pass ◽  
Exchange Resins

Those samples which swell rapidly when exposed to water are, at best, difficult to section for transmission electron microscopy. Some materials literally burst out of the embedding block with the first pass by the knife, and even the most rapid cutting cycle produces sections of limited value. Many ion exchange resins swell in water; some undergo irreversible structural changes when dried. We developed our embedding procedure to handle this type of sample, but it should be applicable to many materials that present similar sectioning difficulties.The purpose of our embedding procedure is to build up a cross-linking network throughout the sample, while it is in a water swollen state. Our procedure was suggested to us by the work of Rosenberg, where he mentioned the formation of a tridimensional structure by the polymerization of the GMA biproduct, triglycol dimethacrylate.

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