Variation of 231Pa, 230Th and 231Pa ex/230Thex in surface sediments of the Sabah-Sarawak coastal waters

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

Research output: Contribution to journalArticle

Abstract

Protactinium and thorium activities were measured in eight surface sediment taken in 2004 to determine effectiveness scavenging of 231Pa at Sabah-Sarawak coastal waters. The result found that activity ratios of 231Paex/230Thex were ranged from 0.07 to 0.13 at all sampling stations. The high 231Pa ex/230Thex activity ratio than the production ratio of 0.093 in seawater at station SR 01, SR 02, SR 04, SB 02 and SB 05, revealed that 231Pa is effectively removed from the water column into the sediment in comparison with 230Th at those stations. Low percentage of 230Thex (90-95%) in comparison with 231Paex at all stations can be attributed to less efficiently scavenged of 230Th onto particles prior deposited at the marine sediment bed.

Original languageEnglish
Pages (from-to)91-95
Number of pages5
JournalJournal of Radioanalytical and Nuclear Chemistry
Volume289
Issue number1
DOIs
Publication statusPublished - Jul 2011

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Malaysia
Protactinium
Sediments
Geologic Sediments
Thorium
Water
Seawater
Scavenging
Sampling

Keywords

  • Th
  • Pa
  • Pa/ Th
  • Production ratio
  • Scavenging
  • Surface sediment

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging
  • Spectroscopy
  • Public Health, Environmental and Occupational Health
  • Pollution
  • Health, Toxicology and Mutagenesis
  • Nuclear Energy and Engineering
  • Analytical Chemistry

Cite this

Variation of 231Pa, 230Th and 231Pa ex/230Thex in surface sediments of the Sabah-Sarawak coastal waters. / Wan Mahmood, Zal U yun; Mohamed, Che Abd. Rahim; Ahmad, Zaharudin; Ishak, Abdul Kadir; Mohamed, Norfaizal.

In: Journal of Radioanalytical and Nuclear Chemistry, Vol. 289, No. 1, 07.2011, p. 91-95.

Research output: Contribution to journalArticle

Wan Mahmood, Zal U yun ; Mohamed, Che Abd. Rahim ; Ahmad, Zaharudin ; Ishak, Abdul Kadir ; Mohamed, Norfaizal. / Variation of 231Pa, 230Th and 231Pa ex/230Thex in surface sediments of the Sabah-Sarawak coastal waters. In: Journal of Radioanalytical and Nuclear Chemistry. 2011 ; Vol. 289, No. 1. pp. 91-95.
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