Variasi profil 210Po dan 210Pb dalam teras sedimen di pesisir pantai perairan Sarawak

Translated title of the contribution: Variation of 210Po and 210Pb profile in the sediment core of Sarawak coastal waters

Zal U yun Wan Mahmood, Che Abd. Rahim Mohamed, Zaharudin Ahmad, Abdul Kadir Ishak

Research output: Contribution to journalArticle

Abstract

This study was performed to observe the variation in the distribution of 210Po and 210Pb through their activity vertical profile and 210Po/210Pb activity ratio in the sediment cores that was taken at some sampling stations in the Sarawak coastal waters. It wasfound that the distribution profile of those radionuclide in the sediment cores varied depending on the sampling location and ANOVA analysis shows significant difference at 95% confidence level for activities of 210Po (p = 0.000), 210Pb (p = 0.035) and 210Po/210Pb (p = 0.000) at all study locations. Generally, the measured activity of 210Po and 210Pb ranged from 337 to 2460 Bq/kg, 11 to 84 Bq/kg at SR 01; 224 to 2008 Bq/kg, 6 to 80 Bq/kg at SR 02; 119 to 1595 Bq/kg, 6 to 84 Bq/kg at SR 03; 241 to 2294 Bq/kg, 5 to 82 Bq/kg at SR 04 and 175 to 1340 Bq/kg, 4 to 44 Bq/kg at SR 05, respectively. In those range it was found that 210Po activities were higher than 210Pb with average of 210Po/210Pb ratios at all stations were from 20 to 35. 7he variation in the distribution profile for the radionuclides are believed to be influenced by some environmental factors and have strong correlation between the radionuclide distribution and the sediment composition of silt (210Po: r = 0.701 and 210Pb: r = 0.648), water depth (210Po: r = -0.647) and the distance from the sampling station to the main land (210Po: r = 0.746 and 210Pb: r = 0.975). Those factors are a major contributions on the variation of 210Po and 210Pb in the samples.

Original languageUndefined/Unknown
Pages (from-to)115-122
Number of pages8
JournalSains Malaysiana
Volume37
Issue number2
Publication statusPublished - Jun 2008

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sediment core
coastal water
radionuclide
sampling
vertical profile
silt
water depth
environmental factor
distribution
sediment
station

Keywords

  • 210Pb
  • 210Po
  • Coastal waers of Sarawak
  • Sediment core

ASJC Scopus subject areas

  • General

Cite this

Variasi profil 210Po dan 210Pb dalam teras sedimen di pesisir pantai perairan Sarawak. / Mahmood, Zal U yun Wan; Mohamed, Che Abd. Rahim; Ahmad, Zaharudin; Ishak, Abdul Kadir.

In: Sains Malaysiana, Vol. 37, No. 2, 06.2008, p. 115-122.

Research output: Contribution to journalArticle

Mahmood, Zal U yun Wan ; Mohamed, Che Abd. Rahim ; Ahmad, Zaharudin ; Ishak, Abdul Kadir. / Variasi profil 210Po dan 210Pb dalam teras sedimen di pesisir pantai perairan Sarawak. In: Sains Malaysiana. 2008 ; Vol. 37, No. 2. pp. 115-122.
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abstract = "This study was performed to observe the variation in the distribution of 210Po and 210Pb through their activity vertical profile and 210Po/210Pb activity ratio in the sediment cores that was taken at some sampling stations in the Sarawak coastal waters. It wasfound that the distribution profile of those radionuclide in the sediment cores varied depending on the sampling location and ANOVA analysis shows significant difference at 95{\%} confidence level for activities of 210Po (p = 0.000), 210Pb (p = 0.035) and 210Po/210Pb (p = 0.000) at all study locations. Generally, the measured activity of 210Po and 210Pb ranged from 337 to 2460 Bq/kg, 11 to 84 Bq/kg at SR 01; 224 to 2008 Bq/kg, 6 to 80 Bq/kg at SR 02; 119 to 1595 Bq/kg, 6 to 84 Bq/kg at SR 03; 241 to 2294 Bq/kg, 5 to 82 Bq/kg at SR 04 and 175 to 1340 Bq/kg, 4 to 44 Bq/kg at SR 05, respectively. In those range it was found that 210Po activities were higher than 210Pb with average of 210Po/210Pb ratios at all stations were from 20 to 35. 7he variation in the distribution profile for the radionuclides are believed to be influenced by some environmental factors and have strong correlation between the radionuclide distribution and the sediment composition of silt (210Po: r = 0.701 and 210Pb: r = 0.648), water depth (210Po: r = -0.647) and the distance from the sampling station to the main land (210Po: r = 0.746 and 210Pb: r = 0.975). Those factors are a major contributions on the variation of 210Po and 210Pb in the samples.",
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AB - This study was performed to observe the variation in the distribution of 210Po and 210Pb through their activity vertical profile and 210Po/210Pb activity ratio in the sediment cores that was taken at some sampling stations in the Sarawak coastal waters. It wasfound that the distribution profile of those radionuclide in the sediment cores varied depending on the sampling location and ANOVA analysis shows significant difference at 95% confidence level for activities of 210Po (p = 0.000), 210Pb (p = 0.035) and 210Po/210Pb (p = 0.000) at all study locations. Generally, the measured activity of 210Po and 210Pb ranged from 337 to 2460 Bq/kg, 11 to 84 Bq/kg at SR 01; 224 to 2008 Bq/kg, 6 to 80 Bq/kg at SR 02; 119 to 1595 Bq/kg, 6 to 84 Bq/kg at SR 03; 241 to 2294 Bq/kg, 5 to 82 Bq/kg at SR 04 and 175 to 1340 Bq/kg, 4 to 44 Bq/kg at SR 05, respectively. In those range it was found that 210Po activities were higher than 210Pb with average of 210Po/210Pb ratios at all stations were from 20 to 35. 7he variation in the distribution profile for the radionuclides are believed to be influenced by some environmental factors and have strong correlation between the radionuclide distribution and the sediment composition of silt (210Po: r = 0.701 and 210Pb: r = 0.648), water depth (210Po: r = -0.647) and the distance from the sampling station to the main land (210Po: r = 0.746 and 210Pb: r = 0.975). Those factors are a major contributions on the variation of 210Po and 210Pb in the samples.

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