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210Po and 210Pb Activity Concentration In The Coral Bands Of Pulau Tuba, Langkawi.

Lee, Jen Nie, and Zaharuddin Ahmad, and Che Abdul Rahim Mohamed, (2007) 210Po and 210Pb Activity Concentration In The Coral Bands Of Pulau Tuba, Langkawi. Malaysian Journal of Analytical Sciences, 11 (1). pp. 65-69. ISSN 13942506

Full text not available from this repository.

Official URL: http://pkukmweb.ukm.my/~mjas/v11_n1/10_163B1-DK.pdf

Affiliations

Universiti Kebangsaan Malaysia, Faculty of Science & Technology, Marine Ecosystem Research Center
Malaysian Institute for Nuclear Technology Research
Universiti Kebangsaan Malaysia, Faculty of Science & Technology, Marine Ecosystem Research Center

Abstract

We examined the concentrations of 210Po and 210Pb in each layers of coral banding of coral skeletons. Concentrations of 210Po and 210Pb in massive corals (i.e. Porites, Favites, Platygyra and Goniostrea) from Pulau Tuba, Langkawi were measured using the Alpha-Spectrometry. The concentrations of 210Po were higher than the concentrations of 210Pb. This may due to continuing source of 210Po from 210Pb. Highest concentration on 210Po in coral banding was 48.30 ± 28.53 Bq/kg, meanwhile for 210Pb was 12.86 ± 5.80 Bq/kg. The ratios of 210Po/210Pb were in the range of 2.21 to 5.49. The variation activity concentrations of 210Po and 210Pb in the coral bands are important to consider in using coral as retrospective study of environmental changes. The coral can represent the total of 210Pb and 210Po in the surrounding water for the past few years.

Kepekatan 210Po dan 210Pb dari setiap lapisan batu karang daripada rangka karang telah dikaji. Kepekatan 210Po dan 210Pb dalam karang yang berbentuk masif seperti Porites, Favites, Playtygyra dan Goniostrea dari Pulau Tuba, Langkawi telah diukur dengan menggunakan Alfa-pektrometri. Kepekatan 210Po adalah lebih tinggi dari 210Pb. Ini mungkin disebabkan oleh punca berterusan 210Po dari 210Pb. Kepekatan tertinggi 210Po dalam lingkaran cincin adalah 48.30 ± 28.53 Bq/kg, manakala bagi 210Pb adalah 12.86 ± 5.80 Bq/kg. Ratio 210Po/210Pb adalah dalam julat 2.21 hingga 5.49. Perbezaan kepekatan aktiviti 210Po dan 210Pb dalam lingkaran cincin adalah penting dalam mempertimbang penggunaan karang sebagai kajian retrospektif bagi perubahan persekitaran. Batu karang boleh mewakili jumlah keseluruhan 210Pb dan 210Po dalam persekitaran air bagi beberapa tahun yang lepas.

Item Type:Journal
Additional Information:This research was supported by the Grant IRPA 08-02-02-10023EAR. The authors would like to thank the laboratory assistants of Universiti Kebangsaan Malaysia and staffs of Malaysian Institute of Nuclear Technology Research (MINT) for their assistant during the field sampling and analysis of samples.
Keywords:Polonium, lead, coral band, spectrometry
Subjects:Q Science
ID Code:1004

1. Mitsuguchi, T., Matsumoto, E., Ade, O., Uchida, T. and Isdale, P.J. 1996. Mg/Ca thermometry in coral skeletons. Science. 274:961-963.

2. McCulloch, M.T. and Esat, T. 2000. The coral record of last interglacial sea levels and sea surface temperature. Chem. Geol. 169:107-129.

3. Mitsuguchi, T., Uchida, T. Matsumoto, E., Isdale, P.J. and Kawana, T. 2001. Variations in Mg/Ca, Na/Ca, and Sr/Ca ratios of coral skeletons with chemical treatments: implication for carbonate geochemistry. Geochim.Cosmochim. Acta. 65:2865-2874.

4. Folsom, T.R., and Beasley, T.M.1973. Contribution from the alpha emitter, polonium-210 to the natural radiation environment of the marine organisms. Proceedings of a Symposium on Radioactive Contamination. Seattle 10-14 July 1972, IAEA, Vienna. 625-632.

5. Schell, W. R., Jokela, T., and Eagle, R. 1973. Natural 210Pb and 210Po in a marine environment. Proceedings of a Symposium of Radioactive Contamination. Seattle 10-14 July, IAEA, Vienna. 701-724.

6. Cherry, R.D., and Shannon, L.V. 1974. The alpha radioavtivity of marine organisms. At Energy Rev. 12:3-46.

7. Heyraud, M., Fowler, S.W., Beasley, T.M., and Cherry, R.D. 1976. Polonium-210 in euphausiids: a detail study. Marine Biology. 34:127-136.

8. Carvalho, F.P. 1988. 210Po in marine organisms: a wide range of natural radioation dose domains. Radiat.Prot. Dosim. 24:113 – 117.

9. Germain, P., Leclerc, G., and Simon, S. 1991. Distribution of 210Po in Mytilus edulis and Fucus vesiculosus along the Channel coast of France: influence of industrial releases in the Seine river and estuary. Fifth International Symposium of the Natural Radiation Environment, N.R.E-V, Salzburg, 22-28 September CEC, USDE.

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

11. Stewart, G.M. and Fisher, N.S. 2003. Experimental studies on the accumulation of polonium-210 by marine photoplankton. Limnol. Oceanogr. 48(3):1193-1201.

12. Nozaki, Y. And Tsunogai, S. 1976. 210Po and 210Pb distributions in ocean water profiles from the Eastern South Pacific. Earth and Planetary Science Letters. 32:297-303.

13. Aller, R.C. and Cochran, J.K. 1976. 234Th/238U disequilibrium in near-shore sediment: particle reworking and diagenetic time scales. Earth and Planetary Sci. Lett. 29:37-50.

14. Bacon, M.P.. Brewer, P.G., Spencer, D.W., Murray, I.W., and Goddard, I. 1980. Lead-210, polonium-210, manganese and iron in the Cariaco Trench. Deep-Sea Res. 27A:119-135.

15. Fellows, D.A., Karl, D.M, and Knauer, G.A. 1981. Large particle fluxes and the vertical transport of living carbon in the upper 1500m of northeast Pacific Ocean. Deep-Sea Res. 28:921-936.

16. Buddemeier, R.W. 1974. Environment controls over annual and lunar monthly cycles in hermatypic coral calcification. Proc. 2nd Int. Coral Reef Symp. Brisbane. 2:259-267.

17. Dodge, R.E. and Thompson. 1974. The natural radiochemical and growth resords in contemporary hermatypic corals from the Atlantic and Carribean. Earth Planet Sci. Lett. 23:313-322.

18. Dodge, R.E. and Brass, G.W. Skeletal extension, density and calcification of the reef coral, Montastrea annularis: St. Croix, U.S. Virgin Island. Bull. Mar. Sci. 34:288-307.

19. Cochran, J.K., Frignani, M., Salamanca, M., Bellucci, L.G., and Guerzoni, S. 1998. Lead-210 as a tracer of atmospheric input of heavy metals in the northern Venice Lagoon. Marine Chemistry. 62:15-29.

20. Nozaki, Y. And Tsunogai, S. 1973. Lead-210 in the North Pacific and the transport of terrestrial material through the atmosphere. Earth and Planetary Sci. Lett. 20:88-92.

21. Tsunogai, S. and Nozaki, Y. 1971. Lead-210 and polonium-210 in the surface water of the Pacific. Geochem J. 5:165

22. Shannon, L.V., Cherry, R.D. and Orren, M.J. 1970. Polonium-210 and lead-210 in the marine environment. Geochim. Cosmochim. Acta. 34:701.

23. Thomson, J. and Turekian, K.K. 1976. 210Po and 210Pb distribution in the ocean water profiles from the Eastern South Pacific. Earth and Planetary Sci. Lett. 32:297-303.

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