Combustion/absorption process for the separation of 14 C and 3 H in radwastes released from nuclear power plants and their analysis
| Autor: | Chang-Jong Kim, Mun Ja Kang, Kun Ho Chung, Young Gun Ko, Young Hyun Cho |
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| Rok vydání: | 2017 |
| Předmět: |
Environmental Engineering
Sorbent Chemistry Health Toxicology and Mutagenesis Liquid scintillation counting Radiochemistry Sorption 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Combustion 01 natural sciences Pollution 0104 chemical sciences Environmental Chemistry Tritium Absorption (chemistry) Fourier transform infrared spectroscopy 0210 nano-technology Ion-exchange resin Waste Management and Disposal Nuclear chemistry |
| Zdroj: | Journal of Hazardous Materials. 331:13-20 |
| ISSN: | 0304-3894 |
| Popis: | Radioactivities of 3H and 14C in spent radioactive ion exchange resins and spent radioactive lubricant oils released from nuclear power plants, has been determined using a combustion and sorption method (combustion method). The liquid scintillation counting (LSC) spectra showed that the interference of other radionuclides has not significantly affected the determination of radioactivities of 3H and 14C in the radwaste samples. The chemical structure of 14CO2, which originated from the combustion of radwastes, trapped 14C sorbent has been investigated using Fourier transform infrared spectroscopy (FT-IR). FT-IR study showed interesting results that peaks for uncoupled CO2 and carbonic amide appeared at FT-IR spectra of CO2 high-absorbed 14C sorbents, while the peak for carbamate was only observed at the spectra of CO2 low-absorbed sorbents. During the CO2 sorption in 14C sorbent, temperature and viscosity of the sorbent increased owing to decrease of enthalpy and increase of apparent molecular weight of the sorbent caused by the bonding formation between sorbent molecules. |
| Databáze: | OpenAIRE |
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