Gross alpha and beta activity and annual committed effective dose due to natural radionuclides in some water spinach (ipomoea aquatica Forssk) samples in Ho Chi Minh City, Vietnam

• Published in: Journal of environmental radioactivity 2017-07, Vol.173, p.44-50
• Main Authors: Le, Hao Cong, Nguyen, Thang Van, Huynh, Thu Nguyen Phong, Huynh, Phuong Truc
• Format: Article
• Language: English
• Subjects: Annual committed effective dose; Gross alpha activity; Gross beta activity; Ipomoea - chemistry; Ipomoea aquatic; Low-background proportional counters LB4200; Radiation Monitoring; Soil-to-plant transfer factors; Vietnam; Water Pollutants, Radioactive - analysis
• ISSN: 0265-931X; 1879-1700
• DOI: 10.1016/j.jenvrad.2016.10.007

The results of gross alpha and beta radioactivity measurement in water spinach samples from some districts in Ho Chi Minh City, Vietnam are presented in this paper. The measurements were performed using a low-background proportional counters LB4200 manufactured by Canberra Company, Inc. Mean concentrations of gross alpha and beta activity were found to be 1.50 ± 0.38 Bq kg−1 to 84.25 ± 8.67 Bq kg−1. In order to keep the recommended dose level, a recommended maximum intake of water spinach was proposed to be 6 kg fresh per year. The total annual committed effective dose due to natural radionuclides in water spinach samples was then found in range from 0.07 mSv y−1 to 0.82 mSv y−1. The dose from 26.32% of samples exceeds the exemption mean dose criterion of 0.3 mSv y−1 but complies with the upper dose principle of 1 mSv y−1 provided in UNSCEAR 2008 report. The estimated soil-to-plant transfer factors for gross alpha and beta for water spinach samples were also presented. •We studied gross alpha/beta level of spinach samples of some districts in Ho Chi Minh City, Vietnam and the health hazards.•A recommended maximum intake of water spinach was proposed to be 6 kg fresh per year.•The majority of alpha-particle-emitting radionuclides found in the samples originated from the soil within this study.•TFβ strongly depends on the plant species and environmental ecological conditions.•TFα and TFβ ranges are lying within the IAEA-TECDOC-472 report.