Influence of Soil Characteristics and Land Use Type on Existing Fractions of Radioactive <sup>137</sup>Cs in Fukushima Soils
Radioactive cesium (<sup>137</sup>Cs) in distinct soil fractions provides key information to its bioavailability, and therefore determining the effect of soil characteristics and land use types on existing fractions of <sup>137</sup>Cs in soils is important for predicting fut...
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MDPI AG
2020-02-01
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| Series: | Environments |
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| Online Access: | https://www.mdpi.com/2076-3298/7/2/16 |
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| author | Akwasi Dwira Mensah Akimi Terasaki Han Phyo Aung Hiroto Toda Sohzoh Suzuki Haruo Tanaka Siaw Onwona-Agyeman Richard Ansong Omari Sonoko Dorothea Bellingrath-Kimura |
| author_facet | Akwasi Dwira Mensah Akimi Terasaki Han Phyo Aung Hiroto Toda Sohzoh Suzuki Haruo Tanaka Siaw Onwona-Agyeman Richard Ansong Omari Sonoko Dorothea Bellingrath-Kimura |
| author_sort | Akwasi Dwira Mensah |
| collection | DOAJ |
| description | Radioactive cesium (<sup>137</sup>Cs) in distinct soil fractions provides key information to its bioavailability, and therefore determining the effect of soil characteristics and land use types on existing fractions of <sup>137</sup>Cs in soils is important for predicting future <sup>137</sup>Cs mobility in Fukushima. Thus, the objective of this study was to investigate the influence of soil characteristics and land use types on sequentially extracted fractions of <sup>137</sup>Cs in Fukushima. In this study, five coniferous forest soils, eight arable soils, and eight paddy rice soils were sampled in 2012 and 2013. The <sup>137</sup>Cs in the soils were separated into four fractions; water-soluble, exchangeable, organic matter-bound and residual fractions. More than 90% of the soil <sup>137</sup>Cs fraction for arable and paddy rice soils was found in the residual fraction, implying significantly reduced bioavailable <sup>137</sup>Cs with higher fixation. In contrast, forest soils measured higher exchangeable and organic matter-bound fractions of 5%−33% and 9%−44%, respectively, implying future <sup>137</sup>Cs mobility in the forest ecosystem. Correlation analysis showed a significant negative correlation (<i>p</i> < 0.05) between the organic matter fraction and residual fraction in both arable and paddy rice soils. There was a significant positive correlation (<i>p</i> < 0.05) for both exchangeable and residual fractions with cation exchange capacity (CEC), total carbon (TC) and total nitrogen (TN) values in arable soils. Organic matter content influenced both exchangeable and residual fractions. It was not clear whether organic matter played a direct role in <sup>137</sup>Cs fixation or mobility in the agricultural soils. In paddy rice soils, the organic matter fraction showed a significant negative correlation with TC and TN values. Soil pH was significantly negatively correlated (<i>p</i> < 0.05) with both water-soluble and residual fractions in forest soils but positively (<i>p</i> < 0.1) with the organically bound <sup>137</sup>Cs fraction. |
| first_indexed | 2024-04-11T13:15:44Z |
| format | Article |
| id | doaj.art-43baa42c0c324994bd15a39bab18bf1c |
| institution | Directory Open Access Journal |
| issn | 2076-3298 |
| language | English |
| last_indexed | 2024-04-11T13:15:44Z |
| publishDate | 2020-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Environments |
| spelling | doaj.art-43baa42c0c324994bd15a39bab18bf1c2022-12-22T04:22:25ZengMDPI AGEnvironments2076-32982020-02-01721610.3390/environments7020016environments7020016Influence of Soil Characteristics and Land Use Type on Existing Fractions of Radioactive <sup>137</sup>Cs in Fukushima SoilsAkwasi Dwira Mensah0Akimi Terasaki1Han Phyo Aung2Hiroto Toda3Sohzoh Suzuki4Haruo Tanaka5Siaw Onwona-Agyeman6Richard Ansong Omari7Sonoko Dorothea Bellingrath-Kimura8Department of Symbiotic Science of Environment and Natural Resources, United Graduate School of Agricultural Science, Tokyo University of Agriculture and Technology, Saiwaicho 3-5-8, Fuchu, Tokyo 183-8509, JapanDepartment of International Agricultural and Environmental Science, Tokyo University of Agriculture and Technology, Saiwaicho 3-5-8, Fuchu, Tokyo 183-8509, JapanMyanmar Farmers’ Academy, Nay Pyi Taw 15013, MyanmarDivision of Environmental Conservation, Graduate School of Agriculture, Tokyo University of Agriculture and Technology, Saiwaicho 3-5-8, Fuchu, Tokyo 183-8509, JapanInstitute of Agriculture, Tokyo University of Agriculture and Technology, Saiwaicho 3-5-8, Fuchu, Tokyo 183-8509, JapanInstitute of Agriculture, Tokyo University of Agriculture and Technology, Saiwaicho 3-5-8, Fuchu, Tokyo 183-8509, JapanInstitute of Agriculture, Tokyo University of Agriculture and Technology, Saiwaicho 3-5-8, Fuchu, Tokyo 183-8509, JapanInstitute of Agriculture and Horticulture, Faculty of Life Science, Humboldt University of Berlin, Albrecht-Thaer-Weg 5, 14195 Berlin, GermanyInstitute of Agriculture and Horticulture, Faculty of Life Science, Humboldt University of Berlin, Albrecht-Thaer-Weg 5, 14195 Berlin, GermanyRadioactive cesium (<sup>137</sup>Cs) in distinct soil fractions provides key information to its bioavailability, and therefore determining the effect of soil characteristics and land use types on existing fractions of <sup>137</sup>Cs in soils is important for predicting future <sup>137</sup>Cs mobility in Fukushima. Thus, the objective of this study was to investigate the influence of soil characteristics and land use types on sequentially extracted fractions of <sup>137</sup>Cs in Fukushima. In this study, five coniferous forest soils, eight arable soils, and eight paddy rice soils were sampled in 2012 and 2013. The <sup>137</sup>Cs in the soils were separated into four fractions; water-soluble, exchangeable, organic matter-bound and residual fractions. More than 90% of the soil <sup>137</sup>Cs fraction for arable and paddy rice soils was found in the residual fraction, implying significantly reduced bioavailable <sup>137</sup>Cs with higher fixation. In contrast, forest soils measured higher exchangeable and organic matter-bound fractions of 5%−33% and 9%−44%, respectively, implying future <sup>137</sup>Cs mobility in the forest ecosystem. Correlation analysis showed a significant negative correlation (<i>p</i> < 0.05) between the organic matter fraction and residual fraction in both arable and paddy rice soils. There was a significant positive correlation (<i>p</i> < 0.05) for both exchangeable and residual fractions with cation exchange capacity (CEC), total carbon (TC) and total nitrogen (TN) values in arable soils. Organic matter content influenced both exchangeable and residual fractions. It was not clear whether organic matter played a direct role in <sup>137</sup>Cs fixation or mobility in the agricultural soils. In paddy rice soils, the organic matter fraction showed a significant negative correlation with TC and TN values. Soil pH was significantly negatively correlated (<i>p</i> < 0.05) with both water-soluble and residual fractions in forest soils but positively (<i>p</i> < 0.1) with the organically bound <sup>137</sup>Cs fraction.https://www.mdpi.com/2076-3298/7/2/16agricultural soils<sup>137</sup>cs bioavailabilityforest soilssequential extractionfukushima soils |
| spellingShingle | Akwasi Dwira Mensah Akimi Terasaki Han Phyo Aung Hiroto Toda Sohzoh Suzuki Haruo Tanaka Siaw Onwona-Agyeman Richard Ansong Omari Sonoko Dorothea Bellingrath-Kimura Influence of Soil Characteristics and Land Use Type on Existing Fractions of Radioactive <sup>137</sup>Cs in Fukushima Soils Environments agricultural soils <sup>137</sup>cs bioavailability forest soils sequential extraction fukushima soils |
| title | Influence of Soil Characteristics and Land Use Type on Existing Fractions of Radioactive <sup>137</sup>Cs in Fukushima Soils |
| title_full | Influence of Soil Characteristics and Land Use Type on Existing Fractions of Radioactive <sup>137</sup>Cs in Fukushima Soils |
| title_fullStr | Influence of Soil Characteristics and Land Use Type on Existing Fractions of Radioactive <sup>137</sup>Cs in Fukushima Soils |
| title_full_unstemmed | Influence of Soil Characteristics and Land Use Type on Existing Fractions of Radioactive <sup>137</sup>Cs in Fukushima Soils |
| title_short | Influence of Soil Characteristics and Land Use Type on Existing Fractions of Radioactive <sup>137</sup>Cs in Fukushima Soils |
| title_sort | influence of soil characteristics and land use type on existing fractions of radioactive sup 137 sup cs in fukushima soils |
| topic | agricultural soils <sup>137</sup>cs bioavailability forest soils sequential extraction fukushima soils |
| url | https://www.mdpi.com/2076-3298/7/2/16 |
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