Song Gang, Zhang Boyou, Wang Xinming, Gong Jingping, Chan Daniel, Bernett John, Lee S C
Guangzhou Institute of Geochemistry, Chinese Academy of Science, Guangzhou 510640, People's Republic of China.
Sci Total Environ. 2005 Mar 1;339(1-3):63-70. doi: 10.1016/j.scitotenv.2004.06.026.
Guangdong is one of the provinces that have most hot springs in China, and many hotels have been set up near hot springs, with spring water introduced into the bath inside each hotel room for hot spring bathing to attract tourists. In the present study, we measured radon in indoor and outdoor air, as well as in hot spring waters, in four hot spring hotels in Guangdong by using NR-667A (III) continuous radon detector. Radon concentrations ranged 53.4-292.5 Bq L(-1) in the hot spring water and 17.2-190.9 Bq m(-3) in outdoor air. Soil gas intrusion, indoor hot spring water use and inefficient ventilation all contributed to the elevated indoor radon levels in the hotel rooms. From the variation of radon levels in closed unoccupied hotel rooms, soil gas intrusion was found to be a very important source of indoor radon in hotel rooms with floors in contact with soils. When there was spring water bathing in the bathes, average radon levels were 10.9-813% higher in the hotel rooms and 13.8-489% higher in bathes compared to their corresponding average levels when there was no spring water use. Spring water use in the hotel rooms had radon transfer coefficients from 1.6x10(-4) to 5.0x10(-3). Radon in some hotel rooms maintained in concentrations much higher than guideline levels might thus have potential health risks to the hotel workers, and technical and management measures should be taken to lower their exposure of radon through inhalation.
广东是中国温泉最多的省份之一，许多酒店建在温泉附近，温泉水引入到每个酒店房间内的浴室供人泡温泉，以此吸引游客。在本研究中，我们使用NR-667A（III）型连续氡探测器，对广东四家温泉酒店的室内外空气以及温泉水中的氡进行了测量。温泉水中氡浓度范围为53.4 - 292.5 Bq L(-1)，室外空气中氡浓度范围为17.2 - 190.9 Bq m(-3)。土壤气体侵入、室内使用温泉水以及通风效率低下均导致酒店房间内氡水平升高。通过封闭无人居住酒店房间内氡水平的变化发现，对于与土壤接触的楼层的酒店房间，土壤气体侵入是室内氡的一个非常重要的来源。当浴室中有温泉水沐浴时，与不使用温泉水时的相应平均水平相比，酒店房间内平均氡水平高出10.9 - 813%，浴室中高出13.8 - 489%。酒店房间内使用温泉水时的氡转移系数为1.6×10(-4)至5.0×10(-3)。因此，一些酒店房间内氡浓度维持在远高于指导水平的状态，可能会对酒店工作人员构成潜在健康风险，应采取技术和管理措施以降低他们通过吸入方式接触氡的剂量。
