Summer decoration pollution must pay attention to several comprehensive management is the key
In the summer, many people feel chest tightness, dizziness, redness, erythema, and other itching and allergy symptoms. In the past, we often thought that it was caused by low pressure and hot weather. However, in fact, this phenomenon may also be caused by the invisible killer of your home, a harmful gas released in high concentrations. Therefore, newly renovated homes must pay attention to ventilation, and they can also choose some other auxiliary products for air purification.
Obvious reduction in air quality
According to research data, summer is the peak period of various indoor harmful gases release, which is 20% to 30% higher than usual. Prof. Pan Xiaochuan of the School of Public Health of Peking University pointed out in an environmental science demonstration activity that they had selected areas in the country for indoor air testing. As a result, they found that the proportion of rooms that truly meet the national standards for indoor air health is very low. Especially in summer, due to the high temperature and the use of air conditioning, indoor harmful gases can easily exceed the standard.
Experts pointed out that there are many items in the room that emit harmful gases. At normal temperature, some harmful gases may not be too harmful to the human body in the lower concentration range of health standards. (Specific scientific research has not been conclusive) However, once the room temperature exceeds 28°C, the concentration of harmful gas released is doubled. If the harmful gases continue to be released in high concentrations over a period of time, it will cause great harm to the human body.
Pollution mainly comes from materials
Dr. Yao Yuan from Department of Building Technology, Tsinghua University pointed out that the main source of indoor air pollution is interior decoration materials and furniture. Paints, plywood, particle board, foam fillers, interior wall paints, plastic veneers, adhesives and other materials contain organic volatiles such as formaldehyde, benzene, ammonia, toluene, and chloroform. These organic volatiles release a large amount of toxic gases. Sustained release. For example, the continuous volatilization period of formaldehyde generally lasts 3-8 years. IARC's World Cancer Research Organization ranks formaldehyde as the first human carcinogen by virtue of its full research results. The carcinogenic effect of formaldehyde is mainly determined by the concentration. High concentrations of formaldehyde are toxic to the nervous system, immune system, liver, etc., and are more teratogenic. Carcinogenic effect. Under high temperature conditions, the release of formaldehyde can be 20%-30% higher than usual.
In addition, benzene-based volatile gases, at a certain temperature (above 28°C), can also cause the volatilization of benzene-containing substances, which mainly has strong irritative effects on the eyes, respiratory tract, and skin, as well as inhibition of hematopoietic function. Studies have shown that chronic benzene poisoning mainly causes dysfunction of bone marrow hematopoiesis, causing aplastic anemia.
It is worth noting that the pollution of the building itself will also increase at high temperatures. Such pollution is gradually being detected, mainly due to the addition of chemical substances to produce ammonia volatiles during construction. Ammonia has a corrosive and irritating effect on the skin and mucous membranes and weakens the body's resistance to diseases.
Child pregnant women are more vulnerable
For adults, the release of 20% to 30% more harmful gases will bring about injuries that cannot be ignored. For children and pregnant women, the negative impact of poorer air quality may be even greater.
The human system is a special state in childhood, the immune system is low, and the respiratory alveoli are much larger than adults. In children who are growing and growing, the amount of breathing is nearly 50% higher than that of adults. In addition, children's nervous system and endocrine system are also vulnerable to toxic gas damage. The persistent high concentration of indoor harmful gases affects children and may cause permanent damage to children's nervous system and immune system.
Women are more vulnerable than men to indoor environmental pollution, especially during pregnancy, due to factors such as physical characteristics, work characteristics and life characteristics. Studies have shown that the incidence of pregnancy complications such as pregnancy-induced hypertension syndrome, pregnancy vomiting and anemia in pregnancy is significantly higher when exposed to toluene, xylene and benzene mixtures during pregnancy. According to expert statistics, the spontaneous abortion rate of those exposed to toluene is significantly higher, and the release of formaldehyde at a high concentration (3-6 mg/m3) may cause miscarriage in sensitive pregnant women.
In addition, benzene can also cause fetal congenital defects. This issue has now attracted the attention of domestic and foreign experts. In preparation for pregnancy and already pregnant, the indoor air condition of the pregnant woman's room should be highly valued and effectively treated.
Comprehensive governance is the key
Prof. Dai Zizhu of the Chinese Center for Disease Control and Prevention pointed out in an environmental science demonstration activity that there are no uniform standards for indoor evaluation methods in China. There are many items involved here, including medical and psychological aspects, and they must be combined to get useful information. . At present, the first level of indoor air quality assessment in China is the concentration index. The concentration of indoor air pollutants is an important issue.
In response to the high concentration of harmful gases released during the summer heat, experts suggest that the following aspects can be addressed and resolved. First of all, to ensure a certain amount of ventilation time, so that indoor air circulation, dilution of harmful gases; but only ventilation for high concentrations of harmful gases is still not enough, you can use some effective removal of indoor harmful gas products to assist. At present, there are many kinds of products that purify indoor air and eliminate harmful gases. For example, an air purifier represented by the Guardian who has just been successfully developed in the past two years can effectively eliminate harmful indoor gases by a combination of chemistry and physics. In addition, you can use formaldehyde sealant products smear on the furniture surface emitting formaldehyde to reduce the formaldehyde emission, but this approach must find the various sections of the furniture plate, a little trouble, but it is said that the effect is good.
In addition, adsorption products such as activated carbon have a certain effect on reducing indoor harmful gases, but this product has a certain scope of application. When activated carbon and other products are adsorbed to a certain degree, they will saturate, and absorption of formaldehyde will no longer absorb formaldehyde. Now. In addition, activated carbon adsorbed products only adsorb formaldehyde and do not adsorb other harmful gases. Therefore, for households with traces of formaldehyde pollution, the method of adopting activated carbon adsorption is effective, but there are other harmful gases for families with serious formaldehyde pollution and other harmful gases. In a contaminated home, the effect of activated carbon is very small.
Of course, we can also use green plants to reduce the concentration of harmful gases in the indoor environment. For example, spider plants can absorb nitrogen oxides, duck leapweed, and tiger blue can absorb formaldehyde gas.
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