Author, Subjects, Keywords

Cited Author

 
 
   » By Author or Editor
 » Browse Author by Alphabet
 » By Journal
 » By Subjects
 » By Affiliations
 » By Type
 » By Year
 » By Latest Additions
 
 
   » By Author
 » Top 20 Authors
 » Top 20 Article
 » Top 20 Journal Cited
 » Top 20 Cited
 » Top 20 Author Cited
 » Usage Since Sept 2007


 
 
 

Login | Create Account

Aktiviti Polonium-210, Plumbum-210 dan Radium-226 di Perairan Sabah, Malaysia

Che Abdul Rahim Mohamed, and Tee, Lee Theng and Zaharuddin Ahmad, (2006) Aktiviti Polonium-210, Plumbum-210 dan Radium-226 di Perairan Sabah, Malaysia. Malaysian Journal of Analytical Sciences, 10 (1). pp. 67-74. ISSN 13942506

Full text not available from this repository.

Official URL: http://pkukmweb.ukm.my/~mjas/v10_n1/10_cherahim2.pdf

Affiliations

Universiti Kebangsaan Malaysia, Faculty of Sciences and Technology, Centre for Environmental Studies and Natural Resources, Oceanography Studies Programe
Malaysian Institute for Nuclear Technology Research

Abstract

Activities of Po-210, Pb-210 and Ra-226 in sediment around the Sabah water at Teluk Brunei, Sipitang, Teluk Kimanis, Kota Kinabalu and Kuala Penyu have been determined. Its distribution was inconsistent and liable changing according to the sampling sites. The activity pattern showed by these radionuclides was Po> Pb> Ra. Whereas, the range of activity for Po-210, Pb-210 and Ra-226 were 0.413 dpm/g to 8.491 dpm/g, 0.023 dpm/g to 2.767 dpm/g and 0.704 dpm/g to 1.619 dpm/g, respectively. Activities of Po-210 were decrease with increasing sediment depth. Then, the activity of Po-210 will slowly reach equal to Pb-210 by depth. The chemical and biological processes in water column and sediments were the major factors that control these radionuclides at the study area.

Abstrak. Aktiviti Po-210, Pb-210 dan Ra-226 dalam sedimen di sekitar perairan Sabah iaitu di Teluk Brunei, Sipitang, Teluk Kimanis, Kota Kinabalu dan Kuala Penyu telah ditentukan. Taburannya adalah tidak konsisten dan berubah mengikut kawasan persampelan. Secara umumnya, corak aktiviti yang ditunjukkan oleh ketiga-tiga radionuklid ini ialah Po> Pb> Ra. Manakala, julat aktiviti bagi Po-210, Pb-210 dan Ra-226 masing-masing ialah 0.413 dpm/g hingga 8.491 dpm/g, 0.023 dpm/g hingga 2.767 dpm/g dan 0.704 dpm/g hingga 1.619 dpm/g. Didapati juga taburan aktiviti Po-210 adalah berkurangan mengikut kedalaman. Malah, aktiviti Po-210 akan menghampiri aktiviti Pb-210 secara beransur-ansur mengikut kedalaman. Faktor yang mempengaruhi aktiviti nuklid di kawasan kajian ialah disebabkan oleh proses kimia dan biologikal yang berlaku di dalam turus air dan sedimen.

Item Type:Journal
Additional Information:Funded by the Ministry of Science, Technology and Environment, IRPA 09-02-02-0121.
Keywords:Activity, Radium, Plumbum, Polonium, sediment, distribution.
Subjects:Q Science
ID Code:1074

[1] Cochran, J.K 1980a. Ecosystem Processes in the Deep Oceans. Rubey Colloquium.Vol. 2. Englewood Cliffs: Prentice-Hall Inc.

[2] Nozaki, Y., Ikuta, N. and Yashima, M. 1990. Unusually large 210Po deficiencies relative to 210Pb in the Kuroshio Current of the East China and Philippine Seas. J.Geophys. Res. 95: 5321-5329

[3] Sanchez-Cabeza, J.A., Masque, P., Ani-Ragolta, I.1998. 210Pb and 210Po analysis in sediments and soils by microwave acid digestion. J. Radioanal. Nucl.Che 227:19-22.

[4] Broecker, W.S. and Peng, T.H. 1982. Tracers in the sea. New york: The Lamont-Doherty Geological Observatory.

[5] Pentreath, R. J 1984. Alpha-emitting nuclides in the marine environment. Nucl.Instrum. Methods. 223: 493.

[6] Chung, Y. and Finkel, R. 1988. 210Po in the western Indian Ocean: distribution, disequilibria and partitioning

between the dissolvedd particulate phases. Earth Planet. Sci. Lett. 88: 232-240. an

[7] Helz, G.R., Setlock, G.H., Cantillo, A.Y., Moore, W.S. 1985/86. Processes controlling the regional distribution of 210Pb, 226Ra and anthropogenic zinc in estuarine sediments. Earth Planet. Sci. Lett 23-24.

[8] Nozaki, Y., Tsubota, H., Kasemsupaya, V., Yashima, M. and Ikuta, N. 1991. Residence times of surface water and particle-reactive Pb and Po in the East China and Yellow seas. Geochim. Cosmochim. Acta. 55: 1265-1272.

[9] Beasley, T.M., Heyrand, M.H., Higgo, J.J.W., Cerry, R.D. and Fowler, S.W. 1978. 210Po and 210 Pb in zooplankton fecal pellets, Mar Biol. 44: 325-328.

[10] Carvalho, F.P. 1995a. 210Pb and 210Po in sediment and suspended matter in the Tagus estuary. Local enhancement of naturavels byastes from phosphal le w159: 201-214.

[11] Carvalho, F.P. 1997. Distribution, cycling and mean residence time of 226Ra, 210Pb and 210Po in the Tagus estuary. Sci. Total Environ. 196: 151-161.

[12] Turekian, K.K., Nozaki, Y. and Benninger, L.K. 1977. Geochemistry of atmospheric radon and radon products. Annu. Rev. Earth Planet. Sci. 5: 227-255.

[13] Carvalho, F.P. and Fowler, S.W. 1993. An exeperimental study on the bioaccumulation and turnover of Polonium-210 in marine shrimp. Mar. Ecol. Prog. Ser. 102: 125-133.

[14] Norhanum Ismail. 1999. Kajian kandungan logam berat dalam sedimen di kawasan kolam abu dan persekitaran marin Stesen Janakuasa Sultan Salahuddin Abdul Aziz, Kapar, Selangor. Tesis Sm. Sn. (Kep.) Universiti Kebangsaan Malaysia.

Repository Staff Only: item control page
 
 
 
 
 
   
© Copyright 2007 MyAIS Faculty of Computer Science and Information Technology, University of Malaya – All Rights Reserved. Malaysian Abstracting and Indexing System is powered by EPrints 3 which is developed by the School of Electronics and Computer Science at the University of Southampton. More information and software credits.