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          Web-based radon is the second most important cause of lung cancer. 明升体育 improvement marble may contaminate

          2012/11/12 12:05:31 (Views: 2012/11/12 12:05:31)

          "The most colorless and tasteless radon is the second leading cause of lung cancer in Canadians. Health Canada urges people to check the radon content in their homes ..." Recently, this Weibo has been widely circulated on the Internet, and many netizens have also paid attention to " "Pollution" problem. Some netizens said that after the decoration, we were very familiar with formaldehyde , benzene, volatile organic compounds, etc., but did not expect to have another "invisible killer".

          [Danger of cricket]

          氡 Blasting lung cancer in the body

          The harm of radon to humans was first discovered in Germany more than 100 years ago. At that time, the incidence of lung cancer was extremely high among miners in the Sniberg mining area in Germany, so it was named "Sniberg disease". Found 45 years later, it may be due to the high radon concentration of the mine. It was not until the 1950s that radon was identified as one of the main causes of lung cancer.

          Experts from the PLA University of Science and Technology explained that when people breathe, if the radon gas enters the human lungs with the air, most of the molecules stagnate in the upper respiratory tract, and when the corpus callosum decays, they emit alpha rays, which are like small bombs Bombard the cells of the lungs. It releases energy in a small range in the body, causing highly concentrated damage to the human body and causing lung cancer in severe cases. Some scientific research shows that if you live in an environment where the concentration of radon is 200 Becks per cubic meter, it is equivalent to smoking 15 cigarettes per person per day, so radon is also the second factor in lung cancer other than smoking.

          [A survey]

          Low radon concentration in Nanjing subway

          According to reports, radon is one of the most powerful "killers" in Nanjing underground buildings. As a radioactive gas, radon is the easiest to accumulate in the underground confined space. The radon itself is a gas that passes freely in the soil and rock air under the building foundation, and can enter the basement through their gaps.

          In the summer of 2009 and 2010, the Jiangsu Provincial Radiation Environment Monitoring Station conducted a preliminary survey of the radon concentration levels of the Nanjing Line 1 subway. The monitoring results show that the radon concentration of 11 stations of Nanjing Metro Line 1 is 3.3 Beck / cubic meter to 45.8 Beck / cubic meter, which will not cause additional harm to human health . Experts analyze that citizens will also feel this way. When waiting on the subway line 1 platform, they often feel a strong wind blowing on the face, which indicates that the ventilation equipment of the underground station is in place and it is very good for reducing radon concentration. Role.

          [明升体育 improvement "Han"]

          Will the marble on the windowsill be too high?

          Yesterday in a home improvement forum in Nanjing, a netizen vomited that he had just finished renovating the house. He always thought that natural things should be safe, but recently I read articles about contamination and suddenly felt that all three windowsills in the home were naturally installed. Marble, worried about pollution, do you have to smash artificial stones? He is also asking for help online to find ways to eliminate puppets.

          According to the teacher of radiation protection and environmental protection of Nanjing University of Science and Technology, indoor radon mainly comes from building materials, such as granite, brick sand, cement, etc., and there is also natural radioactivity associated with it. The state's standard for controlling radon concentration in housing is: the average annual radon concentration of houses already built does not exceed 200 Beck per cubic meter. The radon concentration of newly built houses does not exceed 100 Beck per cubic meter. As long as the content of radon in the room does not exceed the above standards, there will be no harm to the body.

          [Expert Analysis]

          The content of radon in indoor houses in Nanjing is not high

          How can people accurately know the indoor radon concentration level in daily life ? An engineer named Wang from the Nanjing Indoor Environmental Monitoring Center introduced that basement, villa, closed office building, and indoor radon concentration tends to be high, but the amount of radon in indoor houses in Nanjing is not high. It can be seen that the monitoring center has only received a few orders for radon testing since this year. Among the decoration materials, granite has the highest radon content. However, in recent years, the state has banned the use of granite as decoration materials, and the marble and ceramics used in home decoration are very low. Citizens don't have to worry too much, the chances of exceeding the standard are slim.

          [Tips]

          What is the safe concentration of indoor radon?

          The indoor radon concentration safety standard established by the World Health Organization is 100 Beck / cubic meter. China's "Internal Concentration Concentration Control Standards for Housing" and "Underground Building Concentration Concentration Control Standards" stipulate that: in newly built houses, the annual average value of equilibrium equivalent concentration does not exceed 100 Beck / cubic meter; in existing houses, the equilibrium equivalent The annual average concentration does not exceed 200 Beck / cubic meter; the design level of the underground building to be built is 200 Beck / cubic meter.

          These methods can "eliminate"

          1. When building a house or selecting a site, you should avoid areas with high levels of radioactive uranium and radium in rock and soil. Before buying a house, you can ask the relevant agencies to do radon testing to control prevention from the source.

          Second, as far as possible during the decoration, close the gaps between the ground and the wall to reduce the amount of radon leakage.

          3. Ventilation is the simplest and most effective way to reduce indoor radon concentration and improve air quality. Experts suggest that the room should be opened with more windows for ventilation. When using natural gas for bathing and cooking, the ventilation fan and range hood should be turned on in time.

          4. When decorating, try to reduce materials that are prone to radiation and radon, such as stone and ceramic tiles.

          Glossary

          Thorium is a radioactive element produced by the decay of uranium and radium. The simple elemental form is tritium gas, which is colorless and tasteless. Radon is rapidly diluted in the atmosphere, but if it enters a closed room and accumulates, it is harmful to the human body and may cause cancer . Most of the radon in the residence was released from the foundation soil and building materials and decoration materials.

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