Benzene mainly comes from paints, wood lacquers, adhesives and various organic solvents used in interior decoration. The main ingredient is benzene series. It includes pure benzene and toluene, which are quite toxic, and xylene, which is less toxic. Paint added with benzene series solvents will give off a fragrant smell, and its terrible thing is that it makes you lose your vigilance while quietly poisoning.
Sources of benzene pollution: Benzene mainly comes from paints, wood paints, adhesives and various organic solvents used in interior decoration. The main ingredient is benzene series. It includes pure benzene and toluene, which are quite toxic, and xylene, which is less toxic. Paint added with benzene series solvents will give off a fragrant smell, and its terrible thing is that it makes you lose your vigilance while quietly poisoning.
Benzene pollution hazard: The International Health Organization has designated benzene as a strong carcinogen. Benzene can cause leukemia and aplastic anemia and is recognized by the medical community. People who inhale high concentrations of toluene or xylene in a short period of time will cause symptoms of central nervous system anesthesia. In mild cases, dizziness, nausea, chest tightness, fatigue, and severe coma or even death due to respiratory and circulatory failure will occur. Skin, eyes and upper respiratory tract are irritating. Long-term inhalation of benzene can cause aplastic anemia. If the hematopoietic function is completely destroyed, the fatal granular leukopenia can occur and cause leukemia. Benzene is more harmful to women than men. Long-term inhalation of benzene in women of childbearing age can cause menstrual disorders. When women in pregnancy are exposed to benzene, the incidence of pregnancy complications will increase significantly, and even cause birth defects in the fetus. Because benzene is an aromatic hydrocarbon, it is difficult to be aware of its toxicity. If you are in a sealed room that emits the odor of benzene, you may experience dizziness, chest tightness, nausea, and vomiting in a short time. If you do not leave the scene in time, It will cause death. Benzene and benzene compounds mainly come from synthetic fibers, plastics, fuels, rubber, etc., hidden in paints, various coating additives, various adhesives, and waterproof materials. They can also come from the burning of fuel and tobacco leaves.
Benzene pollution detection method: gas chromatography and high performance liquid chromatography can detect the content of benzene in various products. The determination of the purity of benzene generally uses the freezing point method. The detection of trace amounts of benzene in the air can be absorbed by volatile organic solvents such as methyl silicone oil or low molecular weight polymers, and then analyzed by chromatography; or analyzed by colorimetry; the air containing benzene can also be deeply frozen , Freeze benzene, then add ferric sulfate and hydrogen peroxide solution to get yellow-brown or black precipitate, then dissolve with nitric acid, and then analyze by colorimetry. Or directly absorb the benzene in the air with nitric acid and nitrate it into m-dinitrobenzene, then titrate it with a titanium dichloride solution, or use a methyl ethyl ketone alkali solution prepared with m-xylene to colorimetrically quantify.
Benzene pollution solution: Step 1: Open windows for ventilation. Just after the renovation, the pollution must be several times, dozens of times, or even hundreds of times higher than the standard. Therefore, in the first one to two weeks, no means will have much effect, the best The solution is to open windows for ventilation, and discharge the main indoor pollutants to the outdoors as soon as possible. Since the general release time of formaldehyde reaches three to fifteen years, ventilation alone will definitely not solve the problem. Step 2: After the first step, indoor pollution has increased from dozens of times, or even hundreds of times, to several times. At this time, the pollutants are emitted into a slow release process. No matter how you ventilate, it is impossible to suddenly At this time, we must prepare for a protracted battle. The following methods can be used: First, flowers and plants, such as spider orchids, cactus, green plants, etc., these plants have a certain odor-absorbing effect and can eliminate the air. Hazardous substances; Step 3: Buy some Maya blue that can be placed in drawers or cabinets. The deodorizing effect is very good and safe and there is no secondary pollution. Tourmaline and other natural minerals are made by special processing technology, with internal pores The pore size is between 0.27-0.98 nanometers, which are arranged in crystals. At the same time, it has weak electrical properties. The molecular diameters of formaldehyde, ammonia, benzene, toluene, and xylene are all between 0.4-0.62 nanometers, and they are all polar molecules. They have the characteristic of preferentially adsorbing harmful gases such as formaldehyde, benzene, TVOC, etc. to achieve purification The effect of indoor air. Step 4: You can choose some photocatalysts, but you must carefully investigate, otherwise it is easy to have secondary pollution. And also pay attention to whether it has toxic side effects, whether it will cause damage to furniture, etc. (it is said that some things can cause furniture to change color), whether it is convenient to use, etc. Of course, you must continue to ventilate at this stage.