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  • Title: Radon concentrations in drinking water in Beijing City, China and contribution to radiation dose.
    Author: Wu YY, Ma YZ, Cui HX, Liu JX, Sun YR, Shang B, Su X.
    Journal: Int J Environ Res Public Health; 2014 Oct 27; 11(11):11121-31. PubMed ID: 25350007.
    Abstract:
    (222)Rn concentrations in drinking water samples from Beijing City, China, were determined based on a simple method for the continuous monitoring of radon using a radon-in-air monitor coupled to an air-water exchanger. A total of 89 water samples were sampled and analyzed for their (222)Rn content. The observed radon levels ranged from detection limit up to 49 Bq/L. The calculated arithmetic and geometric means of radon concentrations in all measured samples were equal to 5.87 and 4.63 Bq/L, respectively. The average annual effective dose from ingestion of radon in drinking water was 2.78 μSv, and that of inhalation of water-borne radon was 28.5 μSv. It is concluded that it is not the ingestion of waterborne radon, but inhalation of the radon escaping from water that is a substantial part of the radiological hazard. Radon in water is a big concern for public health, especially for consumers who directly use well water with very high radon concentration.
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