Characteristics of radioactivity and radiological risk indices in beach sediments from northern Vietnam.
| Title: | Characteristics of radioactivity and radiological risk indices in beach sediments from northern Vietnam. |
|---|---|
| Authors: | Nhon DH; Institute of Science and Technology for Energy and Environment, Vietnam Academy of Science and Technology, Hai Phong City, Vietnam.; Chien HT; Institute of Science and Technology for Energy and Environment, Vietnam Academy of Science and Technology, Hai Phong City, Vietnam.; Sieu LN; Dalat Nuclear Research Institute, Vietnam Atomic Energy Institute, Da Lat City, Vietnam.; Phu NV; Dalat Nuclear Research Institute, Vietnam Atomic Energy Institute, Da Lat City, Vietnam.; Phuc NV; Dalat Nuclear Research Institute, Vietnam Atomic Energy Institute, Da Lat City, Vietnam.; Tung ND; Dalat Nuclear Research Institute, Vietnam Atomic Energy Institute, Da Lat City, Vietnam.; Ve ND; Institute of Science and Technology for Energy and Environment, Vietnam Academy of Science and Technology, Hai Phong City, Vietnam.; Thanh TD; Institute of Science and Technology for Energy and Environment, Vietnam Academy of Science and Technology, Hai Phong City, Vietnam.; Hoang N; Institute of Earth Sciences, Vietnam Academy of Science and Technology, Hanoi City, Vietnam.; Thuy LTB; Geological Analysis and Verification Centre, Ministry of Agriculture and Environment, Hanoi City, Vietnam.; Anh NN; Institute of Science and Technology for Energy and Environment, Vietnam Academy of Science and Technology, Hai Phong City, Vietnam.; Vuong BV; Institute of Science and Technology for Energy and Environment, Vietnam Academy of Science and Technology, Hai Phong City, Vietnam.; Luu NTM; Institute of Science and Technology for Energy and Environment, Vietnam Academy of Science and Technology, Hai Phong City, Vietnam.; Nghi DT; Institute of Science and Technology for Energy and Environment, Vietnam Academy of Science and Technology, Hai Phong City, Vietnam.; Ngoc DH; Institute of Science and Technology for Energy and Environment, Vietnam Academy of Science and Technology, Hai Phong City, Vietnam.; Thao NV; Institute of Science and Technology for Energy and Environment, Vietnam Academy of Science and Technology, Hai Phong City, Vietnam.; Loan BTT; Institute of Environment, Vietnam Maritime University, Hai Phong City, Vietnam. |
| Source: | Isotopes in environmental and health studies [Isotopes Environ Health Stud] 2026 Mar 03, pp. 1-24. Date of Electronic Publication: 2026 Mar 03. |
| Publication Model: | Ahead of Print |
| Publication Type: | Journal Article |
| Language: | English |
| Journal Info: | Publisher: Informa Healthcare Country of Publication: England NLM ID: 9602611 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1477-2639 (Electronic) Linking ISSN: 10256016 NLM ISO Abbreviation: Isotopes Environ Health Stud Subsets: MEDLINE |
| Imprint Name(s): | Publication: London : Informa Healthcare; Original Publication: [Switzerland?] : Basel, Switzerland ; Langhorne, PA : Published under license by Gordon and Breach Science Publishers ; Distributed by International Publishers Distributor, c1995- |
| Abstract: | The beach sediments in northern Vietnam were analysed for grain size, minerals and radionuclides in 24 samples. Grain size was measured by sieving, minerals by XRD and radionuclides by gamma-ray spectrometry. The radiological risk indices Raeq, ADR, AEDE, Iγr, AUI, Hex, AGDE and ELCR were evaluated. There were three types of sediment: very fine sand, fine sand and medium sand. Very fine sand with a mean diameter (Md) of 105 µm, fine sand with an Md of 192 µm and medium sand with an Md of 330 µm were used. The percentages of minerals with quartz, illite, feldspar, kaolinite, chlorite, goethite, gibbsite and amphibole contents were 80.6, 5.4, 3.3, 2.4, 2.0, 2.0, 0.2 and 0.8 %, respectively. The average radioactivity of 238U, 226Ra, 232Th and 40K was 23.3, 23.1, 27.1 and 214.9 Bq/kg, respectively. The radiological risk indices, including Raeq, ADR, AEDE, Iγr, AUI, Hex, AGDE and ELCR, were 78.38 Bq/kg, 38.8 nGy/h, 0.04 mSv/yr, 0.57, 0.56, 0.21, 256.1 µSv/y and 0.16 × 10-3, respectively. The origin of radioisotopes is mainly in sediments and from mainland, which are influenced by minerals and grain sizes. Additionally, another source from seawater or the atmosphere plays a minor role. The average radioactivity and radiological risk indices were lower than the global average and the recommendation of UNSCEAR, so sediments were safe for humans and organisms. |
| Contributed Indexing: | Keywords: Radioactivity; beach sediment; grain sizes; minerals; northern Vietnam |
| Entry Date(s): | Date Created: 20260303 Latest Revision: 20260303 |
| Update Code: | 20260304 |
| DOI: | 10.1080/10256016.2026.2638242 |
| PMID: | 41774926 |
| Database: | MEDLINE |
Journal Article