Radiocesium and 40 K distribution of river sediments and floodplain deposits in the Fukushima exclusion zone
In this study, radiocesium and K analysis were accomplished for samples of riverbed sediments and floodplain deposits collected from five rivers in the vicinity (
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| Veröffentlicht in: | Journal of environmental radioactivity 2018-09, Vol.195, p.40 |
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| creator | Somboon, S Kavasi, N Sahoo, S K Inoue, K Arae, H Tsuruoka, H Shimizu, H Fukushi, M |
| description | In this study, radiocesium and
K analysis were accomplished for samples of riverbed sediments and floodplain deposits collected from five rivers in the vicinity ( |
| format | Article |
| fullrecord | <record><control><sourceid>pubmed</sourceid><recordid>TN_cdi_pubmed_primary_30243099</recordid><sourceformat>XML</sourceformat><sourcesystem>PC</sourcesystem><sourcerecordid>30243099</sourcerecordid><originalsourceid>FETCH-pubmed_primary_302430993</originalsourceid><addsrcrecordid>eNqFjs0KwjAQhIMgWn9eQfYFhNgWas9iEbyJd4nNlq6mSck2oj69VfTsaYbhm2EGIlqts3y5yqQciwnzRcrer-ORGCcyThOZ55EwB6XJlcgUGlBWQyphD5q483QOHTkLrgJPN_TAqKlB2_EHrIxzujWKLGhsHVOf976rEYpwDVxTowDvpQn8Xnk6izMxrJRhnH91KhbF9rjZLdtwblCfWt93_OP0u5f8BV6XFkba</addsrcrecordid><sourcetype>Index Database</sourcetype><iscdi>true</iscdi><recordtype>article</recordtype></control><display><type>article</type><title>Radiocesium and 40 K distribution of river sediments and floodplain deposits in the Fukushima exclusion zone</title><source>Access via ScienceDirect (Elsevier)</source><creator>Somboon, S ; Kavasi, N ; Sahoo, S K ; Inoue, K ; Arae, H ; Tsuruoka, H ; Shimizu, H ; Fukushi, M</creator><creatorcontrib>Somboon, S ; Kavasi, N ; Sahoo, S K ; Inoue, K ; Arae, H ; Tsuruoka, H ; Shimizu, H ; Fukushi, M</creatorcontrib><description>In this study, radiocesium and
K analysis were accomplished for samples of riverbed sediments and floodplain deposits collected from five rivers in the vicinity (<20 km) of the damaged Fukushima Daiichi Nuclear Power Plant after seven years of the accident. Sediment particle size distribution and major oxide content were determined also for six selected samples to understand the retention and migration process of radiocesium in river environments. The radiocesium activity concentration varied from 103 ± 6 Bq·kg
to 22,000 ± 500 Bq·kg
in riverbed sediments and from 92 ± 5 Bq·kg
to 117,000 ± 2000 Bq·kg
in floodplain deposits. The
Cs/
Cs ratio (decay corrected to 15 March 2011) was 1.02 in the both samples. Compared to monitoring results in 2011, it was proved that the radiocesium distribution pattern had been changed remarkably during seven years. The radiocesium was primarily attached to fine clay particles but its sorption on sand and coarse sand particles was also considerable. The sorption process of radiocesium was not affected by the presence of water and moreover, after seven years of the Fukushima accident, a significant radiocesium migration cannot be expected without particle migration. Consequently, radiocesium will remain for a long time in the river environments and its redistribution is mainly affected by the erosion process of the sediments. The average
K activity concentration of riverbed sediment and floodplain deposit samples was 640 ± 152 Bq·kg
changing from 319 ± 18 Bq·kg
to 916 ± 41 Bq·kg
. In the river estuary zones, significant activity concentration decrements were observed for both radionuclides. This suggests that seawater intrusion has a decreasing effect on both natural and artificial radionuclides via wash-out of particulate radiocesium and
K, and desorption of these radionuclides, but to reveal the detail of this process further investigations are required. The analysis of
K can help in a simple and easy way to reveal the mineral composition differences of sediment samples.</description><identifier>EISSN: 1879-1700</identifier><identifier>PMID: 30243099</identifier><language>eng</language><publisher>England</publisher><ispartof>Journal of environmental radioactivity, 2018-09, Vol.195, p.40</ispartof><rights>Copyright © 2018 Elsevier Ltd. All rights reserved.</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>315,782,786</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/30243099$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Somboon, S</creatorcontrib><creatorcontrib>Kavasi, N</creatorcontrib><creatorcontrib>Sahoo, S K</creatorcontrib><creatorcontrib>Inoue, K</creatorcontrib><creatorcontrib>Arae, H</creatorcontrib><creatorcontrib>Tsuruoka, H</creatorcontrib><creatorcontrib>Shimizu, H</creatorcontrib><creatorcontrib>Fukushi, M</creatorcontrib><title>Radiocesium and 40 K distribution of river sediments and floodplain deposits in the Fukushima exclusion zone</title><title>Journal of environmental radioactivity</title><addtitle>J Environ Radioact</addtitle><description>In this study, radiocesium and
K analysis were accomplished for samples of riverbed sediments and floodplain deposits collected from five rivers in the vicinity (<20 km) of the damaged Fukushima Daiichi Nuclear Power Plant after seven years of the accident. Sediment particle size distribution and major oxide content were determined also for six selected samples to understand the retention and migration process of radiocesium in river environments. The radiocesium activity concentration varied from 103 ± 6 Bq·kg
to 22,000 ± 500 Bq·kg
in riverbed sediments and from 92 ± 5 Bq·kg
to 117,000 ± 2000 Bq·kg
in floodplain deposits. The
Cs/
Cs ratio (decay corrected to 15 March 2011) was 1.02 in the both samples. Compared to monitoring results in 2011, it was proved that the radiocesium distribution pattern had been changed remarkably during seven years. The radiocesium was primarily attached to fine clay particles but its sorption on sand and coarse sand particles was also considerable. The sorption process of radiocesium was not affected by the presence of water and moreover, after seven years of the Fukushima accident, a significant radiocesium migration cannot be expected without particle migration. Consequently, radiocesium will remain for a long time in the river environments and its redistribution is mainly affected by the erosion process of the sediments. The average
K activity concentration of riverbed sediment and floodplain deposit samples was 640 ± 152 Bq·kg
changing from 319 ± 18 Bq·kg
to 916 ± 41 Bq·kg
. In the river estuary zones, significant activity concentration decrements were observed for both radionuclides. This suggests that seawater intrusion has a decreasing effect on both natural and artificial radionuclides via wash-out of particulate radiocesium and
K, and desorption of these radionuclides, but to reveal the detail of this process further investigations are required. The analysis of
K can help in a simple and easy way to reveal the mineral composition differences of sediment samples.</description><issn>1879-1700</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2018</creationdate><recordtype>article</recordtype><recordid>eNqFjs0KwjAQhIMgWn9eQfYFhNgWas9iEbyJd4nNlq6mSck2oj69VfTsaYbhm2EGIlqts3y5yqQciwnzRcrer-ORGCcyThOZ55EwB6XJlcgUGlBWQyphD5q483QOHTkLrgJPN_TAqKlB2_EHrIxzujWKLGhsHVOf976rEYpwDVxTowDvpQn8Xnk6izMxrJRhnH91KhbF9rjZLdtwblCfWt93_OP0u5f8BV6XFkba</recordid><startdate>20180919</startdate><enddate>20180919</enddate><creator>Somboon, S</creator><creator>Kavasi, N</creator><creator>Sahoo, S K</creator><creator>Inoue, K</creator><creator>Arae, H</creator><creator>Tsuruoka, H</creator><creator>Shimizu, H</creator><creator>Fukushi, M</creator><scope>NPM</scope></search><sort><creationdate>20180919</creationdate><title>Radiocesium and 40 K distribution of river sediments and floodplain deposits in the Fukushima exclusion zone</title><author>Somboon, S ; Kavasi, N ; Sahoo, S K ; Inoue, K ; Arae, H ; Tsuruoka, H ; Shimizu, H ; Fukushi, M</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-pubmed_primary_302430993</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2018</creationdate><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Somboon, S</creatorcontrib><creatorcontrib>Kavasi, N</creatorcontrib><creatorcontrib>Sahoo, S K</creatorcontrib><creatorcontrib>Inoue, K</creatorcontrib><creatorcontrib>Arae, H</creatorcontrib><creatorcontrib>Tsuruoka, H</creatorcontrib><creatorcontrib>Shimizu, H</creatorcontrib><creatorcontrib>Fukushi, M</creatorcontrib><collection>PubMed</collection><jtitle>Journal of environmental radioactivity</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Somboon, S</au><au>Kavasi, N</au><au>Sahoo, S K</au><au>Inoue, K</au><au>Arae, H</au><au>Tsuruoka, H</au><au>Shimizu, H</au><au>Fukushi, M</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Radiocesium and 40 K distribution of river sediments and floodplain deposits in the Fukushima exclusion zone</atitle><jtitle>Journal of environmental radioactivity</jtitle><addtitle>J Environ Radioact</addtitle><date>2018-09-19</date><risdate>2018</risdate><volume>195</volume><spage>40</spage><pages>40-</pages><eissn>1879-1700</eissn><abstract>In this study, radiocesium and
K analysis were accomplished for samples of riverbed sediments and floodplain deposits collected from five rivers in the vicinity (<20 km) of the damaged Fukushima Daiichi Nuclear Power Plant after seven years of the accident. Sediment particle size distribution and major oxide content were determined also for six selected samples to understand the retention and migration process of radiocesium in river environments. The radiocesium activity concentration varied from 103 ± 6 Bq·kg
to 22,000 ± 500 Bq·kg
in riverbed sediments and from 92 ± 5 Bq·kg
to 117,000 ± 2000 Bq·kg
in floodplain deposits. The
Cs/
Cs ratio (decay corrected to 15 March 2011) was 1.02 in the both samples. Compared to monitoring results in 2011, it was proved that the radiocesium distribution pattern had been changed remarkably during seven years. The radiocesium was primarily attached to fine clay particles but its sorption on sand and coarse sand particles was also considerable. The sorption process of radiocesium was not affected by the presence of water and moreover, after seven years of the Fukushima accident, a significant radiocesium migration cannot be expected without particle migration. Consequently, radiocesium will remain for a long time in the river environments and its redistribution is mainly affected by the erosion process of the sediments. The average
K activity concentration of riverbed sediment and floodplain deposit samples was 640 ± 152 Bq·kg
changing from 319 ± 18 Bq·kg
to 916 ± 41 Bq·kg
. In the river estuary zones, significant activity concentration decrements were observed for both radionuclides. This suggests that seawater intrusion has a decreasing effect on both natural and artificial radionuclides via wash-out of particulate radiocesium and
K, and desorption of these radionuclides, but to reveal the detail of this process further investigations are required. The analysis of
K can help in a simple and easy way to reveal the mineral composition differences of sediment samples.</abstract><cop>England</cop><pmid>30243099</pmid></addata></record> |
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| source | Access via ScienceDirect (Elsevier) |
| title | Radiocesium and 40 K distribution of river sediments and floodplain deposits in the Fukushima exclusion zone |
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