Recently, a kindergarten in Fengtai District, Beijing, found that some children had high blood lead levels.
In recent years, there have been reports of high blood lead levels and even lead poisoning in infants and young children, causing panic among parents and widespread concern from all walks of life. In an interview with reporters, Song Guang, director of the China Indoor Environment Committee, analyzed the causes of lead pollution in the indoor environment and summarized five causes of indoor lead pollution.
One is the decoration and decoration materials. Lead salt and cadmium, chromium oxide, lead yellow, lead white, red dan, etc. are the main components of decoration materials, paints, coatings and wallpapers. Many decorative materials such as wood coatings and interior wall coatings contain lead. Some families like to decorate children's rooms colorfully, which is more likely to cause air lead pollution in the room.
The second is children's furniture. Parents generally prefer to equip their children with colored furniture, which contains lead. A baby who is growing a tooth likes to lick something with his mouth, or the lead dust inside the paint falls off, causing lead pollution. In addition to the formaldehyde control in the wood-based panels, the national control standards for hazardous materials in wooden furniture are the detection and control of various heavy metals including lead in furniture lacquer. Note that the PVC edge banding of wood-based panel furniture is also prone to lead pollution.
The third is indoor toys and decorative items. Some toys use spray paint, such as metal toys, blocks with colored paint, plastic toys, patterned balloons, book catalogs, etc. Children hold sleeping with toys and often take things without washing their hands after playing toys. Both are prone to lead poisoning.
The fourth is outdoor air. It has been determined that lead pollution concentrations can exceed environmental standards on streets where cars travel frequently. Due to the large lead ratio, most of it is deposited in the air close to the ground and spreads within 30 meters of both sides of the street, so it is the most harmful to children. The monitoring center has received a consultation from a mother of a baby, reflecting that the baby who has just been born for two months has detected a high blood lead, and the test found that the newly renovated house is related to living next to the highway. In addition, factories with lead-containing products around residential areas can also cause lead pollution in indoor environments.
The fifth is lead pollution caused by drinking water pipes. The main reason for the large amount of lead in drinking water is that the pipeline is aging and corroding, leading to lead dissolution; on the other hand, in recent years, plastic water pipes have become an indispensable material for real estate development and home decoration and drainage systems. PVC drinking water pipes and fittings using lead salt as a stabilizer are likely to cause lead pollution in drinking water during use, and the country has already stopped using it.
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