• Title, Summary, Keyword: Cesium137

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A Study on the Realism of Graphic Novel : Focused on Pascal Croci's (리얼리즘적 그래픽 노블: 파스칼 크로시의 『세슘137』)

  • Park, Yoo Shin
    • Cartoon and Animation Studies
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    • pp.121-140
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    • 2013
  • This study takes a look at diverse artistic strategies is taking as a graphic novel of participation. Pascal Croci has used and combined the forms to convey the message he want as a writer of an inclusive graphic novel, image-text. It is linked with an intrinsic to the graphic novel as well as tradition of realism in a wide variety of genres. This study takes a brief look at the realism art in each genre and confirms in relation to the artistic characteristics of intrinsic to the graphic novel is taking as a graphic novel of participation. is consists of the process of covering a case and the form of a broadcasting report and a fictional format emphasizes the objectivity in contents to highlight the journalistic characteristics of the general narrative. uses various artistic languages of realism. The audience feels a realistic case through the experience and writer's message is convey effectively. shows the generic openness of the graphic novel.

Studies on the Behaviour of Radionuclides in the Soil-Plant System;1) On the Uptake of Cesium-137 by Soybean (토양(土壤)-식물계(植物界)에 대(對)한 방사성핵종(放射性核種)의 거동(擧動)에 관(關)한 연구(硏究);I. 대두작물(大豆作物)에 의(依)한 Cs-137의 흡수이행(吸收移行))

  • Ryu, Joon;Kim, Jae-Sung;Lee, Young-Il
    • Korean Journal of Environmental Agriculture
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    • v.2 no.1
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    • pp.30-34
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    • 1983
  • The present study was carried out to determine the effect of a radionuclide, cesium-137, in soybean, which is an element released usually from nuclear facilities. Soybean plants were grown on the pots treated with cesium-137 $0.5{\sim}60{\mu}Ci/1kg$ soil and the uptake, translocation and accumulation of the radiocesium in the plant parts were measured at different growth stage. The results are summarized as follows: 1) Visual toxic symptoms on the plants due to treatment of radioactive cesium were not observed up to $60{\mu}Ci/10Kg$ soil in a pot. 2) The uptake of cesium-137 in soybean plant was increased with increment of concentration applied, while the uptake of potassium was proportionally decreased, indicating to have an ion antagonistic relationship between them. 3) The absolute amounts of cesium-137 in the plants were gradually increased by the pod setting stage, but rather reduced at harvesting stage. The accumulation occurred more in the leaves and stems than the soybean seeds. 4) The rate of uptake was ranged from 0.069 to 0.005 with proportional decrease by increasing concentration applied and the rate of Cs-137 translocation from plants to seeds was averaged 38.6% in soybean plant. The concentration coefficient was 0.04 in the soybean seeds from the pots treated with $20{\mu}Ci$ of cesium-137 and decreased with increment of cesium-137 applied.

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On the Accumulation of Radioactive Materials in Marine Organisms Along the Coast of Korea 3. Cesium-137 Activities in Several Edible Marine Algae

  • Yang, Kyung Rin;Pak, Chan Kirl;Lee, In Kyu
    • 한국해양학회지
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    • v.10 no.2
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    • pp.51-56
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    • 1975
  • Continued to the previous papers, the present investigation is carried out to clarify cesium-137 activities and potassium contents among 54 samples of edible marine algae collected along the coast of Korea during September, 1973 and April, 1974. The potassium contents are variable, 1.5-29.6%, and 11.36% on an average, while most of the members contain them about 10-16% generally. Among the algal phyla, they are 13.49% in green, 10.82% in brown and 16.46% in red algae, respectively. Cesium-137 activities are variable, 0.19-8.13 pCi$\^$137/ Cs/g K, and 2.35 pCi$\^$137/Cs/g K on an average in the samples investigated. Among the algal phyla they are 4.35 in green, 2.17 in brown and 0.89 pCi $\^$137/Cs/g K in red algae, respectively. Green algae contain especially higher activities compared with the other two groups. The brown alga, Myelophycus caespitosus shows the highest activities, 8.13 pCi$\^$137/Cs/g K, among the members investigated. Considering the concentration factor, this plant would be an indicator plant of cesium-137 among the marine algae along the coast of Korea.

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The Study on the Fixation of Cs-137 Radionuclide in Clinoptillolite - The Fixation of Cesium in Clinoptillolite - (Clinoptillolite에 의(依)한 Cs-137 핵종(核種) 흡착(吸着)에 관(關)한 연구(硏究))

  • Lee, Sang-Hoon;Sung, Nak-June;Park, Won-Jong
    • Journal of Radiation Protection and Research
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    • v.3 no.1
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    • pp.1-5
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    • 1978
  • Investigation is carried out that low-level liquid radioactive wastes which is consisted of long half-life nuclides such as cesium can be treated by Korean clinoptillolite as a kind of zeolites. Column operation using a activated clinoptillolite shows good results in terms of break-through curves and comparing to clinoptillolite classified at WARD in U.S, Korean clinoptillolite shows a tailing phenomena longer than that of WARD. The fixation quantity of radioactivity in Korea clinoptillolite is to be about $75{\mu}Ci/100g$ using a $2.5{\times}10^{-3}{\mu}Ci/ml$ solution.

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Removal of cesium(137Cs) and iodide(127I) by microfiltration·nanofiltration·reverese osmosis membranes (정밀여과·나노여과·역삼투 막에 의한 세슘과 요오드의 제거)

  • Chae, Seon-Ha;Kim, Chung-Hwan
    • Journal of Korean Society of Water and Wastewater
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    • v.28 no.5
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    • pp.549-554
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    • 2014
  • This study was evaluated the applicability of the membrane filtration process (Micro Filtration (MF), nanofiltration membranes (NF), reverse osmosis (RO)) on the major radioactive substances, iodine ($I^-$) and cesium ($Cs^+$) using membranes produced in Korea and domestic raw water. Iodine ($I^-$) or cesium ($Cs^+$) in the microfiltration membrane (MF) process could not be expected removal efficiency by eliminating marginally at the combined state with colloidal and turbidity material. At the domestic raw water (lake water, turbidity 1.2 NTU, DOC 1.3 mg/L) conditions, nanofiltration membrane (NF) and reverse osmosis (RO) showed a high removal rate of about 88 ~ 99% for iodine ($I^-$) and cesium ($Cs^+$) and likely to be an alternative process for the removal of radioactive material.

A Study on the Decontamination Performance of Cesium by Soil Washing Process With Flocculating Agent (응집제를 적용한 토양세척 공정에서의 세슘 제염 성능 평가 연구)

  • Song, Jong Soon;Kim, Sun Il
    • Journal of Nuclear Fuel Cycle and Waste Technology(JNFCWT)
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    • v.16 no.1
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    • pp.41-47
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    • 2018
  • Radioactive substances, especially $^{137}Cs$ discharged in the course of Nuclear Power Plant Accident or maintenance of power plants, cause contamination of the soil. For habitation of residents and reuse of industrial land, it is inevitably necessary to decontaminate the soil. This study examines a soil washing process that has actually been used for washing of radioactive-contaminated soil. The soil washing process uses a washing agent to weaken surface tension of the soil and cesium, separating cesium from the soil. In this study, in order to raise the efficiency of the process, a flocculating agent was added to the washing water to remove fine soil and cesium. The cesium concentrations before and after applying the flocculating agent to cesium solution were measured through ICP-OES. When using 0.1 g of J-AF flocculating agent in the experiment, the maximum Cs removal performance was approximately 88%; the minimum value was 67%. Species combinations between cesium and soil were predicted using Visual MINTEQ Code; the ability to reuse the washing water or not, and the removal rate of the fine soil, determined via measurement of the turbidity after applying the flocculating agent, were determined.

Rapid Determination of Cesium-137 ($Cs^{137}$의 迅速定量法)

  • Kim, Tai-Soon;Park, Tai-Won;Lee, Chun-Yung;Seu, Kyung-Sook
    • Journal of the Korean Chemical Society
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    • v.5 no.1
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    • pp.29-32
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    • 1961
  • Two methods for the determination of Cesium-137 in various foods(ashes) were compared. The one comprises two steps, the first being the separation of alkalies as cobaltinitrites or perchlorates by the radiochemical method, and the second being the measurement of photopeak area due to the presence of Cs-137 by the use of scintillation spectrometer. The other method is the direct subjection of ash samples to the spectrometry without the radiochemical separation. The combined contribution of K-40 and Rb-87 to the spectrum was not found on account of the difference in energies of these nuclides. These two methods gave, a good agreement in the determination of Cs-137 in 50-100g ash samples of vegetables or cereals under investigation.

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Recent Advances in Adsorption Removal of Cesium from Aquatic Environment (수환경에서 세슘 흡착 제거의 최근 동향)

  • Lalhmunsiama, Lalhmunsiama;Kim, Jae-Gyu;Choi, Suk Soon;Lee, Seung-Mok
    • Applied Chemistry for Engineering
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    • v.29 no.2
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    • pp.127-137
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    • 2018
  • Radioactive contamination has become an important environmental concern after the accident occurred in Fukushima Daiichi Nuclear Power Plants. $^{134}Cs$ and $^{137}Cs$ are the major fission products and they are main problems in radioactive contamination. Huge amounts of Cs were released during the Fukushima Daiichi Nuclear Power Plants accident and as a result of this incident, many researchers focused on the development of adsorbents for decontamination of radiotoxic cesium. This review will critically evaluate recent advances in the preparation of Prussian blue and its analogue compounds, which are promising materials for cesium removal. Furthermore, this review will discuss recent studies on the cesium adsorption using different types of clay and clay based adsorbents and summarize various types of newly developed Cs adsorbents reported in recent years.

Assessment of radiation exposure from cesium-137 contaminated roads for epidemiological studies in Seoul, Korea

  • Lee, Yun-Keun;Ju, Young-Su;Lee, Won Jin;Hwang, Seung Sik;Yim, Sang-Hyuk;Yoo, Sang-Chul;Lee, Jieon;Choi, Kyung-Hwa;Burm, Eunae;Ha, Mina
    • Environmental Analysis Health and Toxicology
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    • v.30
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    • pp.5.1-5.8
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    • 2015
  • Objectives We aimed to assess the radiation exposure for epidemiologic investigation in residents exposed to radiation from roads that were accidentally found to be contaminated with radioactive cesium-137 ($^{137}Cs$) in Seoul. Methods Using information regarding the frequency and duration of passing via the $^{137}Cs$ contaminated roads or residing/working near the roads from the questionnaires that were obtained from 8875 residents and the measured radiation doses reported by the Nuclear Safety and Security Commission, we calculated the total cumulative dose of radiation exposure for each person. Results Sixty-three percent of the residents who responded to the questionnaire were considered as ever-exposed and 1% of them had a total cumulative dose of more than 10 mSv. The mean (minimum, maximum) duration of radiation exposure was 4.75 years (0.08, 11.98) and the geometric mean (minimum, maximum) of the total cumulative dose was 0.049 mSv (<0.001, 35.35) in the exposed. Conclusions An individual exposure assessment was performed for an epidemiological study to estimate the health risk among residents living in the vicinity of $^{137}Cs$ contaminated roads. The average exposure dose in the exposed people was less than 5% of the current guideline.

Study on the Illite Modification for Removal of Radioactive Cesium in Water Environment near Nuclear Facilities (원자력 시설 인근 수계에서 방사성 세슘 제거를 위한 일라이트 개질 연구)

  • Hwang, Jeonghwan;Choung, Sungwook;Shin, Woosik;Han, Weon Shik
    • Economic and Environmental Geology
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    • v.51 no.2
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    • pp.113-120
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    • 2018
  • Radioactive cesium($^{137}Cs$) can be released into the environment through severe nuclear accidents such as the Chernobyl and Fukushima, The $^{137}Cs$ is one of major monitoring radionuclides due to its chemical toxicity, ${\gamma}$ radiation and long half-life($t_{1/2}=30.2yrs$). It has been known well that illite adsorb selectively and strongly the cesium due to frayed edge sites. The quantity of the FES in the illite could be controlled by weathering processes. Therefore, this study was modified illite samples through artificial weathering in the laboratory to increase sorption efficiency for cesium. Abundant interlayer cations(i.e., K, Ca) were eluted within 1 day, while Si and Al were gradually released from the crystal structure. In addition, broad peaks of XRD indicated the occurrence of chemical weathering. The cesium sorption distribution coefficients increased up to approximately 2 times after the weathering. These results suggested that sorption capacity of illite could be enhanced for cesium through artificial weathering under low temperature.