Reduction of Radioactive Cesium in Contaminated Soil Through Heat Treatment

2017 ◽  
Vol 9 (12) ◽  
pp. 2161-2165
Author(s):  
Byoung-Jik Kim ◽  
Min-Wook Oh
Keyword(s):  
Heat Treatment ◽  
Contaminated Soil ◽  
Radioactive Cesium

scholarly journals Phytoremediation of Radioactive Cesium Contaminated Soil by Cultivation of Amaranthus spp.

2015 ◽  
Vol 84 (1) ◽  
pp. 9-16 ◽  
Author(s):  
Naoki Ogata ◽  
Toshirou Fujita ◽  
Masako Kato
Keyword(s):  
Contaminated Soil ◽  
Radioactive Cesium

scholarly journals Remediation technology for oil-contaminated soil by heat treatment

2013 ◽  
Vol 8 (2) ◽  
pp. 297-310
Author(s):  
Hideto HORAI ◽  
Masahiro KAMIO ◽  
Takeshi KAMEI
Keyword(s):  
Heat Treatment ◽  
Contaminated Soil ◽  
Remediation Technology

Characterization of Plutonium Contaminated Soils From the Nevada Test Site for Remediation Method Selection

2003 ◽  
Author(s):  
Guilhermina Torrao ◽  
Robert Carlino ◽  
Steve L. Hoeffner ◽  
James D. Navratil
Keyword(s):  
Heat Treatment ◽  
Magnetic Separation ◽  
Contaminated Soil ◽  
Manganese Oxides ◽  
Test Site ◽  
Magnetic Fraction ◽  
Nevada Test Site ◽  
Size Separation ◽  
Stable Elements ◽  
Remediation Process

Plutonium (239/240Pu) contamination in soils is an environmental concern at many U.S. Department of Energy (DOE) sites. Remediation actions have been attempted using different technologies, and clean-up plans have been implemented at several sites, such as the Nevada Test Site (NTS). During the 1950’s and early 1960’s, nuclear weapons testing at and near the NTS resulted in soil contaminated with plutonium particles. Clean-up efforts are continuing using conventional remediation techniques. However, the DOE desires to obtain technologies that can further reduce risks, reduce clean-up costs, and reduce the volume of contaminated soil for disposal. Low levels of plutonium contamination are distributed somewhat uniformly throughout the NTS soils and, as a result, it is difficult to obtain volume reductions above 70%. The subject of this research was to characterize the plutonium-contaminated soil from the Tonopah Test Range (TTR) north of the NTS. In order to select remediation methods, it is important to gain a better understanding of how plutonium is bound to the contaminated soil; thus, size separation, magnetic separation, and the sequential extraction (SE) methods were used for this purpose. The SE method consisted of targeting five operationally defined geochemical phases: ion exchangeable, bound to carbonates, bound to iron and manganese oxides (reducible), bound to organic matter, and resistant. Radiometric measurements were used to determine plutonium in each of these defined phases in the soil. Selected stable elements were also determined, to compare the operation of the SE method to other investigators. The SE experiments were performed with two types of samples: soil without heat treatment and soil with heat treatment. The MF treatment was used to destroy the organic content in the soil so as to further evaluate the SE procedure. Particle size analysis indicated that approximately 37% of the TTR soil by weight was larger than 300 micrometers and this fraction contained little plutonium, < 100 pCi/g. Thus, size separation may be useful as part of a remediation process. Magnetic separation tests showed that the magnetic fraction of the TTR soils is very small, and the non-magnetic fraction still contained the majority of the plutonium. Thus, a magnetic separation step in a treatment process would not be useful. Following SE, analysis results of the stable elements agreed with reported values. The SE results also indicated an association of plutonium with the organic and resistant defined phases. The main change in 239/240Pu distribution following heat treatment was an increase of plutonium recovery in the reducible phase. The SE results showed that fairly aggressive chemical treatment would be required if leaching were part of a remediation process.

scholarly journals Novel Approach for the Remediation of Radioactive Cesium Contaminated Soil with nano-Fe/Ca/CaO Dispersion Mixture in Dry Condition

2013 ◽  
Vol 1 ◽  
pp. 08003
Author(s):  
S. R. Mallampati ◽  
Y. Mitoma ◽  
T. Okuda ◽  
S. Sakita ◽  
M. Kakeda
Keyword(s):  
Contaminated Soil ◽  
Radioactive Cesium ◽  
Novel Approach

scholarly journals Wireless Backpack System for Detection of Radioactive Cesium on Contaminated Soil Using Portable Plastic Scintillator with Efficient Readout Device

Electronics ◽  
2021 ◽  
Vol 10 (22) ◽  
pp. 2833
Author(s):  
Sujung Min ◽  
Kwang-Hoon Ko ◽  
Bumkyung Seo ◽  
JaeHak Cheong ◽  
Changhyun Roh ◽  
...  
Keyword(s):  
Contaminated Soil ◽  
Plastic Scintillator ◽  
Detection Efficiency ◽  
Detection System ◽  
Radiation Detectors ◽  
Radioactive Cesium ◽  
Efficiency Performance ◽  
Portable System ◽  
Gamma Radiations ◽  
Wireless System Design

The miniaturization and usability of radiation detectors make it increasingly possible to use mobile instruments to detect and monitor gamma radiations. Here, a Bluetooth-based mobile detection system for integrated interaction in a backpack was designed and implemented to smart equipment for the detection of radioactive cesium on contaminated soil. The radiation measurement system was demonstrated in the form of a backpack using a quantum dot (QD)-loaded plastic scintillator manufactured and prepared directly in this study, and it can be measured by a person in the wireless framework of integrated interaction. The QD-loaded plastic scintillator was measured after setting the distance from the contaminated soil to 20, 50, and 100 mm. As a result, the detection efficiency of the commercial plastic scintillator (EJ-200) was calculated to be 11.81% and that of the QD-loaded plastic scintillator was 15.22%, which proved the higher detection efficiency performance than the commercial plastic scintillator. The measurement result was transmitted to a personal computer using Bluetooth as a portable system. In the future, this wireless system design could be expanded as a wireless communication system equipped with a global positioning system to detect and measure radioactively contaminated environments.

MEASURES AGAINST RADIOACTIVE CONTAMINATION DUE TO FUKUSHIMA FIRST NUCLEAR POWER PLANT ACCIDENTS PART III: REMOVING AND DECONTAMINATION OF CONTAMINATED SOIL

2012 ◽  
Vol 22 (01n02) ◽  
pp. 13-19 ◽  
Author(s):  
K. ISHII ◽  
A. TERAKAWA ◽  
S. MATSUYAMA ◽  
A. HASEGAWA ◽  
K. NAGAKUBO ◽  
...  
Keyword(s):  
Elementary Schools ◽  
Power Plant ◽  
Nuclear Power Plant ◽  
Radioactive Contamination ◽  
Contaminated Soil ◽  
Nuclear Power ◽  
Exponential Dependence ◽  
Radioactive Cesium ◽  
Cesium Atoms

We studied the structure of radioactive cesium distribution in soil and found the exponential dependence. This behavior could be explained theoretically. We developed a useful method to decontaminate the soil contaminated with radioactive cesium atoms. We applied our method to the contaminated school yards of elementary schools of Marumori town and decontaminated total area of about 7000 m2.

Contaminated soil cleaning test results by heat treatment

2002 ◽  
Vol 2002.12 (0) ◽  
pp. 288-290
Author(s):  
Mamoru ARAOKA ◽  
Satoshi OKUNO ◽  
Reiji TAHARA ◽  
Hiroki HONDA ◽  
Takeshi AMARI ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Contaminated Soil ◽  
Test Results

scholarly journals Paper Sludge Carbon as an Adsorbent for Fukushima Radiocontaminated Paddy Soil

2020 ◽  
Vol 10 (18) ◽  
pp. 6471
Author(s):  
Ai Van Tran ◽  
Makoto Yanaga
Keyword(s):  
Magnesium Sulfate ◽  
Contaminated Soil ◽  
Paddy Soil ◽  
Paddy Field ◽  
Potassium Sulfate ◽  
Paper Sludge ◽  
Radioactive Cesium ◽  
Polished Rice ◽  
Activity Concentrations ◽  
Calcium Magnesium

Radiocontaminated soil in a paddy field in the Iitate village in Fukushima was treated with an industrial paper sludge carbon (PSC) prior to growing rice in May 2011. The results showed that the sum of the activity concentrations of 134Cs and 137Cs in the polished rice harvested in October 2011 was 30 Bq·kg−1, a level much lower than the Japanese governmental safeguard value of 100 Bq·kg−1. Upon contacting with the contaminated soil, the contents of calcium, magnesium, copper, potassium, and barium in the PSC were decreased. Among the PSCs impregnated with various chlorides and sulfates of the previously mentioned minerals, potassium chloride, copper sulfate, magnesium sulfate, and potassium sulfate yielded higher decontamination degrees compared to the original PSC. The results imply that radioactive cesium in the soil exchanges cations with these minerals.

Calculation of dose conversion coefficients for radioactive cesium in contaminated soil by depth and density

2018 ◽  
Vol 316 (3) ◽  
pp. 1213-1219
Author(s):  
Il Park ◽  
Jin O Lee ◽  
Tae Gwan Do ◽  
Min Jun Kim ◽  
A Ra Go ◽  
...  
Keyword(s):  
Contaminated Soil ◽  
Radioactive Cesium ◽  
Conversion Coefficients
Sign in / Sign up

Export Citation Format

Share Document