90Sr Activity in the High Seas and Coastal Regionsof Korea-Japan-Russia-China Compared with Exponential Decay of 90Sr Global Fallout

*Muslim Muslim -  Department of Marine Science Diponegoro University, Semarang-Indonesia Telp. 62.24.7474698. e-mail: muslim_muslim@yahoo.com, Indonesia
Received: 19 Nov 2010; Published: 22 Nov 2010.
Open Access
Abstract

Konsentrasi dan aktivitas 90Sr saat radioaktif buatan jatuh secara global di bumi pada tahun 1964 dibandingkan dengan konsentrasi dan aktivitas 90Sr di lepas pantai dan daerah pantai Korea-Japan-Russia-China secara tahunan dari tahun 1964 sampai tahun 2000. Konsentrasi 90Sr menunjukkan penurunan secara terus menurus bahkan jauh di bawah exponential decay, hal ini dikarenakan oleh effektifnya lingkungan terhadap waktu paruh. Dari analisa tersebut disimpulkan bahwa konsentrasi dan aktivitas 90Sr di lepas pantai dan daerah pantai Korea-Japan-Russia-China secara original lebih banyak berasal dari radioaktif buatan yang jatuh secara global dari pada dari sumber hasil buangan lokal.
Kata kunci90Sr, perairan lepas pantai, daerah pantai, exponential decay, global

Concentration and activity of 90Sr in the high seas and coastal regions of Korea-Japan-Russia-China from the
global fallout to 2000 were studied. The variation of 90Sr in these study areas decreased continuously from
1964 when global fallout radioactive was started to 2000. Suggesting that from 1964 to present the 90Sr
activity from any local resources at Korea-Japan-Russia-China doesn’t significant, because the 90Sr activities
much lower compared with the exponential decay, it caused by effective environmental half-lives. In conclusion,
the activity of 90Sr in the high seas and coastal regions of Korea-Japan-Russia-China originated entirely from
the global fallout rather than from any local point sources.

Key words: 90Sr, high seas, coastal regions, exponential decay, global fallout

 

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