2. Some tinplate food cans use lead-tin welding as solder, resulting in high lead content in the cans, which will lead to lead poisoning after long-term consumption; The survey shows that children who drink too much drinks for a long time have higher blood lead levels, because some cans are welded with lead and tin, but they still contain a small amount of lead, and long-term excessive drinking will accumulate in children's bodies.
3. Some tableware (ceramic glaze) contains lead. The brighter the color, the higher the lead content. Porcelain sold in stalls has no quality requirements (big manufacturers have strict quality standards and low lead content), so it can be used as tableware.
4. Harmful substances such as lead and mercury will be released when coal is burned.
5. Old-fashioned water pipes (galvanized pipes) have high lead content, but PVC pipes (PVC plastics) are widely used at present, and lead stearate is cheap and hardener needs to be added. Therefore, the lead content of PVC pipes is high, and lead is easily released due to the low PH value of water.
6. Louvre windows, plastic steel doors and windows are also made of PVC. Lead precipitates easily in the sun. 7. Some crayons and oil pastels also have high lead content.
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Lead is a chemical element, its chemical symbol is Pb (Latin plum Lead), and its atomic number is 82, which is the non-radioactive element with the largest atomic weight.