Radon is a colorless, odorless and imperceptible inert gas. Building materials such as cement, brick brakes, marble and ceramic tiles are the main sources of radon, and geological fault zones will also release a large amount of radon. Radon and its daughters enter the human body with air, or attach to tracheal mucosa and lung surface, or dissolve in body fluids and enter cell tissues, forming internal irradiation, which induces lung cancer, leukemia and respiratory diseases. Research by the World Health Organization shows that radon is the second largest carcinogen of lung cancer after smoking.
Imported granite has radiation.
Granite marble
The most typical example is the lounge chairs provided by some department stores. Red granite is mostly imported because of its beautiful color and noble appearance. But this kind of granite is 0.7 ~ 1.0 microsieverts, and the radiation is so high that it scares people to death. Fortunately, no one put this granite marble indoors. If installed in a closed space, people who wait in this space for such a long time will easily get nasopharyngeal carcinoma and lung cancer.
Granite in MRT station
There are some granite on the rest chairs or buildings of Taipei MRT station, but they are not red granite, and the radiation is about 0.3 ~ 0.4 microsieverts, which has exceeded the inspection standard of Taiwan Province Province. Fortunately, the MRT station is also an open space, and the radiation is diluted by air, so the MRT station is not used for long-term residence, so the impact is not great.
How to prevent radiation by installing natural marble at home?
A: Formaldehyde in wood can also cause cancer, so it cannot be used.
All materials have pollution sources of some nature, and it is impossible to be completely absent. It's just a matter of how much. Less, it is harmless to human body, and it is safe to use it well. When selecting materials, we must pass the customs, do not covet cheap materials, strictly control the construction process and guard against unnecessary pollution. After decoration, it is necessary to ventilate frequently to discharge harmful pollutants, and it is also necessary to use some auxiliary materials for decontamination, such as charcoal. Activated carbon (absorbing moisture in the air and formaldehyde in materials), chlorophytum, aloe and other plants have the function of absorbing harmful substances and purifying the air.