Field R W, Fisher E L, Valentine R L, Kross B C
College of Medicine, Department of Preventive Medicine and Environmental Health, University of Iowa, Iowa City 52242-5000, USA.
Am J Public Health. 1995 Apr;85(4):567-70. doi: 10.2105/ajph.85.4.567.
A point-of-use waterborne radon-222 (222Rn) survey of a small Iowa town was performed to determine the cause of unnaturally high waterborne 222Rn concentrations in the municipality. The source of the elevated 222Rn concentrations was a newly discovered reservoir of waterborne 222Rn originating from distribution-system radium-226 (226Ra) adsorbed internal pipe scale deposits. Because the proposed national drinking water regulations for 222Rn require sampling at the origin of the distribution system rather than at the point of use, the proposed scheme for collection of water samples may not represent actual consumer waterborne 222Rn exposure in all cases.
对爱荷华州一个小镇进行了一次使用点的水中氡-222（²²²Rn）调查，以确定该市政当局水中²²²Rn浓度异常高的原因。²²²Rn浓度升高的来源是一个新发现的水中²²²Rn储存库，其源自分布系统中吸附在内部管道水垢沉积物上的镭-226（²²⁶Ra）。由于拟议的国家²²²Rn饮用水法规要求在分布系统的源头而非使用点进行采样，因此拟议的水样采集方案在所有情况下可能都无法代表实际消费者接触的水中²²²Rn情况。
