NORM activity concentration in sediment cores from the Peninsular Malaysia East Coast Exclusive Economic Zone

Yii, Mei-Wo; Mahmood, Zal U'yun Wan; Ahmad, Zainal Ariffin; Jaffary, Nurrul Assyikeen Md.; Ishak, Kamaruzaman

doi:10.1007/s10967-010-0928-3

Cited by 16 publications

(1 citation statement)

References 23 publications

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“…The bottles were then sealed with thick PVC tape to prevent the degradation of radioisotope 226 Ra. All samples were stored for a period of more than 30 days to establish a secular balance between 226Ra and their radioactive progeny before gamma ray count [52][53][54]. Finally the radioisotope value for 210 Pb and 226 Ra were calculated for 86,400s using both HPGe Spectrometer with 25% detector efficiency and their activity were corrected up to date of sample collection.…”

Section: Methodsmentioning

confidence: 99%

The Evaluation of Brunei Bay Sediment Cores Sedimentation Rate Using 210Pb Radiometric Dating Technique

Joseph

Ghazali

Shazili

et al. 2018

IJET

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The use of radioisotopes 210Pb and 226Ra in establishing the geochronology of pollutants in the sediment core and sediment dating is being widely used in the world. The present study was conducted in Brunei Bay region of Malaysian waters to define the sedimentation rate and sediment age as well as to investigate the possible sources of pollutants into this bay. Sediment core samples were cut by layers, dried and analyzed using High Purity Germanium (HPGe) Spectrometer. Results obtained marked the time interval of 1875, 1956, 1962 and 1945 for sediment core B5, B9, B13 and LB consecutively. Sediment core of B9 and LB showed higher sedimentation rate compared to B5 and B13 due to the rapid development of urban and industrial. The increasing of sedimentation rate over the last 25 years was in line with the increasing of human activities surround the bay. Additionally, the health and distribution of mangroves surround Brunei Bay were important to determine the sediment movement which will affect the sedimentation rate in the bay. Overall, by controlling human activities as well as sustaining the mangroves population, could maintain and preserve the natural and unique environment of Brunei Bay.

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Section: Methodsmentioning

confidence: 99%