Penilaian bio-kebolehcapaian bagi232Th dan238U dalam lantanida pekat dan residu permurnian larut resap air di malaysia

Translated title of the contribution: Bioaccessibility assessment of232TH and238U from lanthanide concentrate and water leach purification residue in malaysia

Nur Shahidah Abdul Rashid, Um Wooyong, Yasmin Mohd Idris Perama, Amran Ab. Majid, Khoo Kok Siong Kok Siong

Research output: Contribution to journalArticle

Abstract

The aim of this case study was to estimate the bioaccessibility of232Th and238U from lanthanide concentrate (LC) and water leach purification (WLP) residue of Lynas Advanced Materials Plant by analysing the solubility of these radionuclides in synthetic gastrointestinal fluids. A DIN in vitro bioaccessibility method was applied to determine the targeted radionuclides from the LC and WLP residue, which were further evaluated through inductively coupled plasma mass spectrometry.232Th and238U concentrations in the gastrointestinal fluids portrayed the maximum amount of contaminants that were potentially available for intestinal absorption and transfer into the blood. The maximum concentrations of232Th in the LC and WLP residue were 0.1410 ± 0.0331 mg kg-1 and 0.1621 ± 0.1190 mg kg-1, respectively. As for238U in the LC and WLP residue during the intestinal phase for high-risk cases, the maximum concentrations were 0.0558 ± 0.0164 mg kg-1 and 0.0480 ± 0.0213 mg kg-1, respectively. The maximum bioaccessibility of232Th and238U was 0.14 % and 0.93 %, respectively. Based on the assessment, the committed equivalent dose and committed effective dose of232Th and238U were below the United Nations Scientific Committee on the Effects of Atomic Radiation reference values. Overall, the DIN in vitro bioaccessibility method is feasible to estimate the solubility of232Th and238U from LC and WLP residue, and is also useful for monitoring and risk assessment purposes for environmental, health, and contaminated samples.

Original languageMalay
Pages (from-to)794-806
Number of pages13
JournalMalaysian Journal of Analytical Sciences
Volume22
Issue number5
DOIs
Publication statusPublished - 1 Oct 2018

Fingerprint

Lanthanoid Series Elements
Purification
Water
Radioisotopes
Solubility
Fluids
Inductively coupled plasma
Risk assessment
Blood
Health
Impurities
Radiation
Monitoring

ASJC Scopus subject areas

  • Analytical Chemistry

Cite this

Penilaian bio-kebolehcapaian bagi232Th dan238U dalam lantanida pekat dan residu permurnian larut resap air di malaysia. / Rashid, Nur Shahidah Abdul; Wooyong, Um; Perama, Yasmin Mohd Idris; Ab. Majid, Amran; Kok Siong, Khoo Kok Siong.

In: Malaysian Journal of Analytical Sciences, Vol. 22, No. 5, 01.10.2018, p. 794-806.

Research output: Contribution to journalArticle

Rashid, Nur Shahidah Abdul ; Wooyong, Um ; Perama, Yasmin Mohd Idris ; Ab. Majid, Amran ; Kok Siong, Khoo Kok Siong. / Penilaian bio-kebolehcapaian bagi232Th dan238U dalam lantanida pekat dan residu permurnian larut resap air di malaysia. In: Malaysian Journal of Analytical Sciences. 2018 ; Vol. 22, No. 5. pp. 794-806.
@article{dd36943438ad451e9cfdc6b798c7f042,
title = "Penilaian bio-kebolehcapaian bagi232Th dan238U dalam lantanida pekat dan residu permurnian larut resap air di malaysia",
abstract = "The aim of this case study was to estimate the bioaccessibility of232Th and238U from lanthanide concentrate (LC) and water leach purification (WLP) residue of Lynas Advanced Materials Plant by analysing the solubility of these radionuclides in synthetic gastrointestinal fluids. A DIN in vitro bioaccessibility method was applied to determine the targeted radionuclides from the LC and WLP residue, which were further evaluated through inductively coupled plasma mass spectrometry.232Th and238U concentrations in the gastrointestinal fluids portrayed the maximum amount of contaminants that were potentially available for intestinal absorption and transfer into the blood. The maximum concentrations of232Th in the LC and WLP residue were 0.1410 ± 0.0331 mg kg-1 and 0.1621 ± 0.1190 mg kg-1, respectively. As for238U in the LC and WLP residue during the intestinal phase for high-risk cases, the maximum concentrations were 0.0558 ± 0.0164 mg kg-1 and 0.0480 ± 0.0213 mg kg-1, respectively. The maximum bioaccessibility of232Th and238U was 0.14 {\%} and 0.93 {\%}, respectively. Based on the assessment, the committed equivalent dose and committed effective dose of232Th and238U were below the United Nations Scientific Committee on the Effects of Atomic Radiation reference values. Overall, the DIN in vitro bioaccessibility method is feasible to estimate the solubility of232Th and238U from LC and WLP residue, and is also useful for monitoring and risk assessment purposes for environmental, health, and contaminated samples.",
keywords = "Bioaccessibility, Lanthanide concentrate, Thorium, Uranium, Water leach purification",
author = "Rashid, {Nur Shahidah Abdul} and Um Wooyong and Perama, {Yasmin Mohd Idris} and {Ab. Majid}, Amran and {Kok Siong}, {Khoo Kok Siong}",
year = "2018",
month = "10",
day = "1",
doi = "10.17576/mjas-2018-2205-07",
language = "Malay",
volume = "22",
pages = "794--806",
journal = "Malaysian Journal of Analytical Sciences",
issn = "1394-2506",
publisher = "Faculty of Science and Technology, Universiti Kebangsaan Malaysia",
number = "5",

}

TY - JOUR

T1 - Penilaian bio-kebolehcapaian bagi232Th dan238U dalam lantanida pekat dan residu permurnian larut resap air di malaysia

AU - Rashid, Nur Shahidah Abdul

AU - Wooyong, Um

AU - Perama, Yasmin Mohd Idris

AU - Ab. Majid, Amran

AU - Kok Siong, Khoo Kok Siong

PY - 2018/10/1

Y1 - 2018/10/1

N2 - The aim of this case study was to estimate the bioaccessibility of232Th and238U from lanthanide concentrate (LC) and water leach purification (WLP) residue of Lynas Advanced Materials Plant by analysing the solubility of these radionuclides in synthetic gastrointestinal fluids. A DIN in vitro bioaccessibility method was applied to determine the targeted radionuclides from the LC and WLP residue, which were further evaluated through inductively coupled plasma mass spectrometry.232Th and238U concentrations in the gastrointestinal fluids portrayed the maximum amount of contaminants that were potentially available for intestinal absorption and transfer into the blood. The maximum concentrations of232Th in the LC and WLP residue were 0.1410 ± 0.0331 mg kg-1 and 0.1621 ± 0.1190 mg kg-1, respectively. As for238U in the LC and WLP residue during the intestinal phase for high-risk cases, the maximum concentrations were 0.0558 ± 0.0164 mg kg-1 and 0.0480 ± 0.0213 mg kg-1, respectively. The maximum bioaccessibility of232Th and238U was 0.14 % and 0.93 %, respectively. Based on the assessment, the committed equivalent dose and committed effective dose of232Th and238U were below the United Nations Scientific Committee on the Effects of Atomic Radiation reference values. Overall, the DIN in vitro bioaccessibility method is feasible to estimate the solubility of232Th and238U from LC and WLP residue, and is also useful for monitoring and risk assessment purposes for environmental, health, and contaminated samples.

AB - The aim of this case study was to estimate the bioaccessibility of232Th and238U from lanthanide concentrate (LC) and water leach purification (WLP) residue of Lynas Advanced Materials Plant by analysing the solubility of these radionuclides in synthetic gastrointestinal fluids. A DIN in vitro bioaccessibility method was applied to determine the targeted radionuclides from the LC and WLP residue, which were further evaluated through inductively coupled plasma mass spectrometry.232Th and238U concentrations in the gastrointestinal fluids portrayed the maximum amount of contaminants that were potentially available for intestinal absorption and transfer into the blood. The maximum concentrations of232Th in the LC and WLP residue were 0.1410 ± 0.0331 mg kg-1 and 0.1621 ± 0.1190 mg kg-1, respectively. As for238U in the LC and WLP residue during the intestinal phase for high-risk cases, the maximum concentrations were 0.0558 ± 0.0164 mg kg-1 and 0.0480 ± 0.0213 mg kg-1, respectively. The maximum bioaccessibility of232Th and238U was 0.14 % and 0.93 %, respectively. Based on the assessment, the committed equivalent dose and committed effective dose of232Th and238U were below the United Nations Scientific Committee on the Effects of Atomic Radiation reference values. Overall, the DIN in vitro bioaccessibility method is feasible to estimate the solubility of232Th and238U from LC and WLP residue, and is also useful for monitoring and risk assessment purposes for environmental, health, and contaminated samples.

KW - Bioaccessibility

KW - Lanthanide concentrate

KW - Thorium

KW - Uranium

KW - Water leach purification

UR - http://www.scopus.com/inward/record.url?scp=85057171561&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85057171561&partnerID=8YFLogxK

U2 - 10.17576/mjas-2018-2205-07

DO - 10.17576/mjas-2018-2205-07

M3 - Article

AN - SCOPUS:85057171561

VL - 22

SP - 794

EP - 806

JO - Malaysian Journal of Analytical Sciences

JF - Malaysian Journal of Analytical Sciences

SN - 1394-2506

IS - 5

ER -