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Determination of 226Ra, 228Ra and 40K in Soil from Felda Jengka-15 Oil Palm Plantation

Masitah Alias, and Zaini Hamzah, and Ahmad Saat, and Muhamat Omar, and Zakaria Tajuddin, (2005) Determination of 226Ra, 228Ra and 40K in Soil from Felda Jengka-15 Oil Palm Plantation. Malaysian Journal of Analytical Sciences, 9 (1). pp. 126-132. ISSN 1394-2506

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Affiliations

Universiti Teknologi MARA. Faculty of Allied Sciences
Universiti Teknologi MARA. Faculty of Allied Sciences
Universiti Teknologi MARA. Faculty of Allied Sciences
Malaysian Institute for Nuclear Technology Research (MINT)
Universiti Teknologi MARA. Faculty of Applied Sciences

Abstract

Naturally occurring radioisotopes such as 238U and 232Th are present in earth’s crust producing uranium and thorium daughters such as 226Ra and 228Ra. Radium is found at low level in soil, water, rocks, coal, plants and food. 40K also exist in the earth crust with a concentration of about 1.8 mg/kg or 13 pCi/g. In this study, the activity concentrations of 226Ra, 228Ra and 40K were determined in topsoil samples collected from 10 acres of oil palm plantation in FELDA Jengka 15, Maran District, Pahang Darul Makmur. 350 g of dried samples were ground and packed in a plastic container and allow to stabilize for at least three week before counting using gamma spectrometer with Germanium hyper pure detector (HPGe). The gamma spectra were analyzed using Genie 2000 for the activity concentrations of 226Ra and 228Ra and 40K. The results show the range of 10.5 – 35.3 Bq/kg for 226Ra, 11.4 – 42.8 Bq/kg for 228Ra and 11.3 – 156.6 Bq/kg for 40K.

Item Type:Journal
Additional Information:My sincere thanks the Universiti Teknologi Mara (UiTM) for financing this project through BRC Grant No 600-BRC/ST.5/3/599, and special thanks are also due to Masood Bin Mohamad (land owner), Encik Zahir, Encik Din (both from UiTM Jengka); Cik Zalina Laili and Puan Rusni Rejab (both are from MINT) for their assistance.
Keywords:Gamma spectrometry, topsoil, natural radioisotopes
Subjects:Q Science, Computer Science
ID Code:2268

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