The Malaysian Journal of Analytical Sciences Vol 10 No 2 (2006): 295 -302

 

 

AKTIVITI ²²⁶Ra DALAM SISTEM ALIRAN SUNGAI LEMBANGAN LANGAT, SELANGOR

 

Che Abd. Rahim Mohamed, Zaharuddin Ahmad*, Goh Chiew Mon

 

Pusat Pengajian Sains Sekitaran & Sumber Alam, Fakulti Sains & Teknologi

Universiti Kebangsaan Malaysia, 43600 Bangi, Selangor

*Malaysian Institute for Nuclear Technology Research

Bangi, 43000 Kajang, Selangor

 

Abstract

The activities of ²²⁶Ra in water column and sediment along Sungai Langat and Sungai were obtained at thirteen stations. The highest activities of ²²⁶Ra in water were represented by station located at Kajang and Teras Jernang.   Whereas, the lowest activities of ²²⁶Ra were shown by station located at Kampung Rincing Hilir and Kampung Sungai Buah. The activities of ²²⁶Ra recorded during first and second samplings were ranging from 0.033 Bq/L to 0.390 Bq/L and 0.051 to 0.260 Bq/L, respectively. Then the highest activities in sediment during first and second samplings were recorded at Kampung Sungai Lalang and Kampung Rincing Hilir stations, and the lowest activities were represented by station located at Kampung Bahagia. The activities of ²²⁶Ra in sediments are ranged from 28.02 Bq/kg to 247.16 Bq/kg and 38.19 Bq/kg to 196.77 Bq/kg, respectively, for first and second sampling.  Generally, their activities in Sungai Langat and Sungai Semenyih sediments were not increases with increasing water flow from down- stream to upper-stream. This indicated that the sources of ²²⁶Ra in river waters and sediments at the study area are not related to the river water flow.

 

Keywords: ²²⁶Ra, sediment, water

 

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