Loading...
Please wait, while we are loading the content...
Similar Documents
ASSESSMENT OF NATURALLY OCCURING RADIONUCLIDE IN THE SEDIMENT CORE IN SOUTHERN OF KUALA SELANGOR COASTAL AREA (Kajian Radionuklida Tabii di dalam Teras Sedimen di Kawasan Pesisir Pantai Selatan Kuala Selangor)
| Content Provider | Semantic Scholar |
|---|---|
| Author | Hamzah, Zainab Karim, Umi Kalsum Abdul Saat, Ahmad Yunus, Sabarina Md |
| Copyright Year | 2014 |
| Abstract | This study is to determine naturally occurring radionuclide activity concentrations of 226 Ra, 228 Ra and 40 K in sediment core using gamma-ray spectrometry with a high-purity germanium (HPGe) detector. Sediment core was taken from 14 locations in two areas in Kuala Selangor which are Pantai Remis and Pantai Jeram. Samples were taken during Northeast Monsoon in January and March 2011. 40 K was measured via its 1460 keV energy peak, 226 Ra (of the 238 U) and 228 Ra (of the 232 Th) through their γ-ray lines 609.3 keV ( 214 Bi) and 911.1 keV ( 228 Ac). The mean activity concentration of 226 Ra in Pantai Remis is 37.49±1.38 Bq/kg and ranged between 19.44-55.74 Bq/kg. For 228 Ra the activity concentration ranged between 40.75-82.23 Bq/kg with a mean value of 58.64±2.60 Bq/kg; and that of 40 K from 206.53-398.30Bq/kg with a mean of 316.95 ± 10.88 Bq/kg. Meanwhile the mean activity concentration of 226 Ra in Pantai Jeram is 32.35±1.27 Bq/kg and ranged between 21.28-38.67 Bq/kg. For 228 Ra the activity concentration ranged between 34.25-106.72 Bq/kg with a mean value of 57.96±2.55Bq/kg; and that of 40 K from 246.12394.53 Bq/kg with a mean of 325.14±10.87 Bq/kg. Different vertical profile of 226 Ra, 228 Ra and 40 K activity concentration observed between sampling locations might due to the sediment mineralogy, source of radioactivity, geochemistry of the area and oceanic process. Plus, smaller 228 Ra/ 226 Ra activity ratio range suggests that interaction on these two series with the surrounding were very similar. Value of study radionuclides in present study were almost comparable with study done in other part in Malaysia. Moreover, world mean value of 226 Ra, 228 Ra and 40 K provided by UNSCEAR (1993) fall within the value range |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | http://www.ukm.my/mjas/v18_n2/UmiKalsum_18_2_7.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
