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| Main Authors: | , , , , , , , , , |
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| Format: | Artículo científico |
| Language: | en |
| Published: |
Journal of environmental radioactivity
2026
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| Subjects: | |
| Online Access: | https://pubmed.ncbi.nlm.nih.gov/42202617/ |
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Table of Contents:
- Distribution, bioaccumulation and radiological risks of uranium in bivalve mollusks in the tropical coastal waters of Lam Dong, Vietnam: Implications for marine monitoring and uptake pathway. Duong, Van-Hao Chu, Trung-Tien Pham Thi, Thanh-Xuan Nguyen, Khai M Priyadharshini, Marckasagayam Musthafa, Mohamed Saiyad Phan Trong, Trinh Duong, Duc-Thang Nguyen, Thanh-Duong Nguyen Thanh Kim, Hue Animals Bivalvia Water Pollutants, Radioactive Radiation Monitoring Uranium Vietnam Bioaccumulation Natural uranium isotopes (U and U) levels have been investigated in muscle and hepatopancreas tissues of twelve ecologically and economically bivalve species from a tropical coastal area, Lam Dong, Vietnam (the titanium placer area). The U and U activities were observed to be higher in the hepatopancreas organ and varied among species ranging from 0.24 ± 0.02 to 13.1± 0.35 and from 0.25± 0.03 to 15.5± 1.6 Bq/kg in muscle tissues, from 0.32± 0.03 to 25.0± 2.1 and from 0.61± 0.06 to 94.7± 9.47 Bq/kg in hepatopancreas, respectively. The preferential accumulation in the hepatopancreas highlights its role in metal uptake, detoxification, and storage. Variations U/U activity ratio between tissues in the range 1.0 - 3.89 and seawater indicated mixing uptake pathways, primarily through the gill and digestive tract. There was a significant negative correlation between uranium concentration in the hepatopancreas and both body weight and shell length, suggesting that morphological parameters could influence accumulation and providing valuable correction parameters and a sensitive bioindicator for marine radiological biomonitoring applications. Although three species had uranium concentration factors exceeding the IAEA guideline values, the annual effective doses for all age groups were below the guideline value, and ecological doses remained well below ERICA thresholds, indicating negligible radiological risk from uranium isotopes. These findings support the use of bivalves in marine radiation monitoring and contribute to food safety and public health management in similar tropical coastal areas worldwide.