If you look up the hazards of marble on the Internet, you will find that there are many kinds, such as radon. 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.
The above passage was found on the internet to describe the harm of radon. People who don't know will be scary at first sight. In fact, what more people don't know is that radon must be produced in houses, especially old houses. Radon gas is not produced by marble. It's just far from the standard of harm to human body. In our monitoring for several years, we found that the radiation of marble is generally below13 μ Gy/ h/h. In the data of environmental monitoring, you will find that the radiation below 20μGy/h (micro gy/h) does not need to consider the harm. If it reaches 20, it is necessary to analyze the reason by spectrometer. If it is K, there is no need to worry, because after K decays, it will produce γ and β rays, which belong to external irradiation. They have more relaxed standards for the harm of radiation to human body, so there is no need to worry at all. Only radium is harmful. It is believed that radium decays into α, producing radon gas, and then lead. Radium has a complete decay connection, and any process is harmful to human body, but we have not found this situation yet, not to mention the national standard time is less than 25. The laboratories in our unit are all marble floors. Artificial marble is less harmful to human body than natural marble.
Remind that everything has radiation, no matter what it is produced, it will be harmful if it reaches a standard, just like any food has bacteria, and it will be harmful to the human body if it reaches a standard.
If you are in doubt about the harm of marble, I suggest that you often open the window for air, or entrust the environmental protection department to monitor it, which will probably cost less than 1300 RMB.
As for how long the radiation lasts, there is no timeliness, because any object will radiate outward. For example, the half-life of radium is 1600 years.
Be afraid of what people say, don't scare people.
There are many things circulating on the Internet, such as electric mattresses and cell phone radiation. Don't worry too much because the radiation of the electric mattress is very low (as long as there is electricity, there is electromagnetic field, so there is electromagnetic radiation. ), and it is said that when the electromagnetic radiation of the mobile phone is as high as 2000mGs (milligauss), 10- 150 mGs, the tumor suppressor gene R53 in the body can get sick, and so on. Don't believe it. This is purely a rumor. In this way, mobile phones are more poisonous than poison. The radiation at the moment when the mobile phone is connected is 5-6V/m (I won't say the specific meaning, because it is of little use to you. ), and the national standard is below 13v/m, and some of them are copied from some uncertain information searched online. Most of them are hype to promote a series of so-called instruments such as electromagnetic radiation tester, radiation tester and environmental tester. Online prices are in the tens of thousands, and these are made of simple structures, but the cost is only 180%. The real electromagnetic radiation tester needs about 200,000-300,000 yuan, and all of them are imported.