The presence of natural radioactivity and 137Cs in the South China Sea bordering peninsular Malaysia
The presence of natural radioactivity and 137Cs has been investigated in fresh media obtained from South China Sea locations off the coast of peninsular Malaysia. The media include seafood, sea water and sediment. The samples were collected some weeks prior to the devastating 2011 Tōhoku earthquake...
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| Format: | Article |
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Oxford University Press
2013
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| _version_ | 1796946369749975040 |
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| author | Amin, Yusoff Mohd Mahat, R.H. Nor, Roslan Md Khandaker, Mayeen Uddin Takleef, G.H. Bradley, D.A. |
| author_facet | Amin, Yusoff Mohd Mahat, R.H. Nor, Roslan Md Khandaker, Mayeen Uddin Takleef, G.H. Bradley, D.A. |
| author_sort | Amin, Yusoff Mohd |
| collection | UM |
| description | The presence of natural radioactivity and 137Cs has been investigated in fresh media obtained from South China Sea locations off the coast of peninsular Malaysia. The media include seafood, sea water and sediment. The samples were collected some weeks prior to the devastating 2011 Tōhoku earthquake and associated tsunami, the occurrence of which precipitated the Fukushima incident. All samples showed the presence of naturally occurring 226Ra, 228Ra and primordial 40K, all at typically prevailing levels. The concentrations of natural radioactivity in molluscs were found to be greater than that of other marine life studied herein, the total activity ranging from 337 to 393 Bq kg−1 dry weight. The total activity in sea water ranged from 15 to 88 Bq l−1. Sediment samples obtained at deep sea locations more than 20 km offshore further revealed the presence of 137Cs. The activity of 137Cs varied from ND to 0.5 Bq kg−1 dry weight, the activity increasing with offshore distance and depth. The activity concentrations presented herein should be considered useful in assessing the impact of any future radiological contamination to the marine environment. |
| first_indexed | 2024-03-06T05:30:41Z |
| format | Article |
| id | um.eprints-12224 |
| institution | Universiti Malaya |
| last_indexed | 2024-03-06T05:30:41Z |
| publishDate | 2013 |
| publisher | Oxford University Press |
| record_format | dspace |
| spelling | um.eprints-122242019-03-18T08:49:57Z http://eprints.um.edu.my/12224/ The presence of natural radioactivity and 137Cs in the South China Sea bordering peninsular Malaysia Amin, Yusoff Mohd Mahat, R.H. Nor, Roslan Md Khandaker, Mayeen Uddin Takleef, G.H. Bradley, D.A. Q Science (General) The presence of natural radioactivity and 137Cs has been investigated in fresh media obtained from South China Sea locations off the coast of peninsular Malaysia. The media include seafood, sea water and sediment. The samples were collected some weeks prior to the devastating 2011 Tōhoku earthquake and associated tsunami, the occurrence of which precipitated the Fukushima incident. All samples showed the presence of naturally occurring 226Ra, 228Ra and primordial 40K, all at typically prevailing levels. The concentrations of natural radioactivity in molluscs were found to be greater than that of other marine life studied herein, the total activity ranging from 337 to 393 Bq kg−1 dry weight. The total activity in sea water ranged from 15 to 88 Bq l−1. Sediment samples obtained at deep sea locations more than 20 km offshore further revealed the presence of 137Cs. The activity of 137Cs varied from ND to 0.5 Bq kg−1 dry weight, the activity increasing with offshore distance and depth. The activity concentrations presented herein should be considered useful in assessing the impact of any future radiological contamination to the marine environment. Oxford University Press 2013 Article PeerReviewed Amin, Yusoff Mohd and Mahat, R.H. and Nor, Roslan Md and Khandaker, Mayeen Uddin and Takleef, G.H. and Bradley, D.A. (2013) The presence of natural radioactivity and 137Cs in the South China Sea bordering peninsular Malaysia. Radiation Protection Dosimetry, 156 (4). pp. 475-480. ISSN 0144-8420, DOI https://doi.org/10.1093/rpd/nct097 <https://doi.org/10.1093/rpd/nct097>. http://rpd.oxfordjournals.org/content/156/4/475 http://dx.doi.org/10.1093/rpd/nct097 |
| spellingShingle | Q Science (General) Amin, Yusoff Mohd Mahat, R.H. Nor, Roslan Md Khandaker, Mayeen Uddin Takleef, G.H. Bradley, D.A. The presence of natural radioactivity and 137Cs in the South China Sea bordering peninsular Malaysia |
| title | The presence of natural radioactivity and 137Cs in the South China Sea bordering peninsular Malaysia |
| title_full | The presence of natural radioactivity and 137Cs in the South China Sea bordering peninsular Malaysia |
| title_fullStr | The presence of natural radioactivity and 137Cs in the South China Sea bordering peninsular Malaysia |
| title_full_unstemmed | The presence of natural radioactivity and 137Cs in the South China Sea bordering peninsular Malaysia |
| title_short | The presence of natural radioactivity and 137Cs in the South China Sea bordering peninsular Malaysia |
| title_sort | presence of natural radioactivity and 137cs in the south china sea bordering peninsular malaysia |
| topic | Q Science (General) |
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