Common sense of formaldehyde hazards and sources i

2022-07-22
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After the decoration of a new house, formaldehyde is always unavoidable. Formaldehyde is a colorless gas with strong pungent odor. Formaldehyde is a toxic substance in plasma, which can combine with protein. When inhaled in high concentration, it will cause serious respiratory tract irritation and edema, eye irritation and headache. Today, Xiaobian will introduce some formaldehyde removal methods for new houses. What is the most effective way to remove formaldehyde

first, the harm of formaldehyde to human body

the impact of formaldehyde on human health is mainly manifested in abnormal smell, stimulation, allergy, abnormal lung function, abnormal liver function and abnormal immune function

1. Skin contact causes allergy

formaldehyde can cause allergic dermatitis, stains and necrosis. When human skin is in direct contact with formaldehyde, or in an environment with high concentration of formaldehyde, our skin will gradually lose moisture, produce wrinkles, reduce sweat secretion, hinder the normal metabolism of the human body, block pores, and grow acne, which may lead to skin itching, ulceration, and small blood spots. Formaldehyde can be absorbed and poisoned by human body through respiratory tract and skin, causing headache, nausea, chest tightness, dizziness and tremor, changing blood and hematopoietic function, and affecting nervous system, liver, kidney and immune system

2. Irritating effect on human body

the harm of formaldehyde also has irritating effect on skin and mucosa. Formaldehyde is a toxic substance in protoplasm, which can bind to protein and is greater than 0.08m-sup3; Formaldehyde concentration can cause redness of eyes, itching of eyes, discomfort or pain in throat, hoarseness, sneezing, chest tightness, asthma, dermatitis, etc. After inhaling high concentrations of formaldehyde into the human body, the respiratory tract will be seriously stimulated, inducing bronchial asthma, chest tightness, edema and other disorders of the body's immune level, affecting the central nervous system function, and may also affect the digestive system. In serious cases, it can damage the liver and hematopoietic function

3. Excessive concentration can cause cancer

high concentration formaldehyde is a genotoxic substance. Nasopharyngeal tumors can be caused by high concentration inhalation in laboratory animals. Formaldehyde has great damage to human cell protein and retina, and will lead to abnormal lung, liver and immune function. It is listed as a suspected carcinogen by the International Association for research on cancer. Studies have shown that formaldehyde has strong carcinogenic and cancer promoting effects

second, the impact of formaldehyde concentration level on human body

the harm of formaldehyde to human body needs to reach a certain concentration. Different concentrations lead to different human performance

its concentration reaches 0.06-0.07mg/m³ per cubic meter of air; Children will develop mild asthma. Up to 0.1mg/m³ When, there is peculiar smell and discomfort; Up to 0.5mg/m³ When, it can irritate eyes and cause tears; Up to 0.6mg/m³, May cause throat discomfort or pain. When the concentration is higher, it can cause nausea and vomiting, cough, chest tightness, asthma and even pulmonary edema; Up to 30mg/m³ It will immediately cause death

long term exposure to low-dose formaldehyde can cause chronic respiratory diseases, nasopharyngeal carcinoma, colon cancer, brain tumors, menstrual disorders, gene mutations in the nucleus, DNA single strand interconnection and DNA protein interconnection, inhibit the repair of DNA damage, pregnancy syndrome, cause chromosomal abnormalities in newborns, leukemia, and cause memory and intelligence decline in adolescents. Among all contacts, children and pregnant women are particularly sensitive to formaldehyde, and the harm is even greater. According to relevant statistics, 70% of human diseases are related to the indoor environment. In China, 120000 people die of indoor pollution every year, and more than 90% of children with leukemia fall ill within one year after living in newly decorated houses

III. source of indoor formaldehyde

1. Man made board

various man-made boards, plywood, slender wood, fiberboard, particleboard and other man-made boards used in indoor decoration have been added with formaldehyde to varying degrees in the production process. Although the urea formaldehyde resin adhesive with formaldehyde as the main component is toxic, it has strong adhesion, and can also strengthen the hardness of the plate and prevent insects and corrosion. Wood based panel is often used in the production process, so the panel is also a main reason for indoor formaldehyde exceeding the standard

2. Indoor furniture

in addition to artificial boards, furniture at home may also be one of the reasons for the indoor formaldehyde concentration exceeding the standard. Furniture made of wood-based panels, solid wood panels and other plates may also use adhesives in the assembly of furniture due to the addition of adhesives in the production process, which further increases the formaldehyde content of furniture. In addition to board furniture, some cloth furniture and kitchen furniture also contain formaldehyde to varying degrees

3. Wall building materials

once the wall building materials such as paint, wallpaper emulsion are improperly selected, the indoor formaldehyde content will also exceed the standard. Wall coating manufacturers in the market will declare that they are zero formaldehyde products. In fact, the so-called “ Zero formaldehyde products ” It doesn't exist, and the current technology can't completely remove formaldehyde. Before purchasing paint products, ask the merchant for the product test certificate to see the content of formaldehyde test items. According to relevant regulations, the indoor formaldehyde concentration should not be higher than 0.08mg/; (0.08 mg/m3). If the merchant refuses or cannot produce the test certificate, the environmental protection performance of the product can be imagined

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