1. What is radon pollution?
Radon radiation will cause radon pollution. Radon is a radioactive inert gas, chemical symbol Rn, which exists in minerals containing uranium or thorium and also in the atmosphere near the ground. It can be dissolved in water, and can release high-energy and strong radioactive alpha particles and gamma rays. After inhaling air containing radon or drinking water containing radon, the human body will be exposed to internal radiation. Especially in buildings with magmatic rocks as building materials, indoor radon content is high. Living in this environment for a long time has obvious influence on human health.
Second, the manifestations of radon pollution
Radon and its derivatives will stay in the human respiratory tract for a long time after entering the human body through the respiratory tract, leading to respiratory diseases. The harm of radon to human health is mainly manifested in: under the attack of high concentration radon, the blood cells of human body will change; Radon has a high affinity for human fat, especially when it is combined with the nervous system, which is more harmful. In addition, because radon is a radioactive gas, people will induce diseases such as lung cancer after inhalation.
Three. Sources and hazards of radon pollution
Radon usually enters the room by contaminated materials such as concrete, stone, paint and bricks. Choosing contaminated materials is an important source of indoor radon pollution.
Radon can diffuse in adipose tissue, nervous system, reticuloendothelial system and blood, causing damage to cells and eventually inducing cancer. Radon has been declared as one of the main environmental carcinogens of 19 by WHO and listed as the main indoor carcinogen by the International Agency for Research on Cancer. Radon will not only increase the possibility of cancer, especially lung cancer, sepsis and other diseases, but also cause organic damage to human cells, which is potentially harmful to children and even the third generation.
Four, radon pollution detection methods and indicators
According to the Indoor Air Quality Standard GB/T 18883-2002, the activated carbon box should be placed in the detection position for 3 to 7 days, and then it should be sealed for 3 hours before it can be measured and analyzed by gamma spectrometer. According to the national environmental protection department, the radon content in ground buildings shall not exceed 200 Bekkerel /m3, and the design building material index shall not exceed 100 Bekkerel /m3.
5. How to remove radon from home?
When building or buying a house, try to stay away from areas with radioactive minerals; Carefully choose stone building materials; Pay attention to the frequent ventilation at home.
(The above answers were published on 20 16-08-0 1. Please refer to the actual situation for the current purchase policy. )
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