The influence of lead on human health, scientists began to detect the lead concentration in human blood samples as an early indicator of lead poisoning. The data show that if the drinking water is close to 50 μ g/L, the lead concentration in the patient's blood sample is above 30 μ g/L. The requirements for nursing babies should be stricter, and the average blood lead concentration should not exceed10-15 μ g/L. The safe limit of lead content in drinking water is 100 μ g/L, and the highest acceptable level is 50 μ g/L. In addition, lead poisoning is characterized by stomachache, headache, trembling, nervousness and synaptic decrease. In the worst case, it may be unconscious until death. At very low concentrations, the chronic long-term health effects of lead are as follows: affecting the brain and nervous system. Scientists have found that even if the lead concentration in blood samples of urban children is still acceptable, it still obviously affects children's intellectual development and abnormal behavior. Only by reducing the lead content in drinking water can we ensure that the total lead intake of people is reduced. The popularization and application of unleaded gasoline has made great contributions to reducing lead pollution in the environment, especially to reducing lead in atmospheric particles. Lead also affects enzymes and cell metabolism.
Lead is a metallic chemical element with chemical symbol Pb (Latin plum Lead) and atomic number 82. It is a non-radioactive element with the largest atomic weight. Lead is a soft and ductile weak metal, which is toxic and heavy metal. The original color of lead is bluish white, and its surface is quickly covered with a layer of dark gray oxide in the air. It can be used in buildings, lead-acid batteries, warheads, artillery shells, welding materials, fishing tools, anti-radiation materials, trophies and some alloys, such as lead-tin alloys for electronic welding. Lead is a metal element, which can be used as a material for resisting sulfuric acid corrosion, ionizing radiation and storage batteries. Its alloy can be used as type, bearing, cable sheath and so on. , can also be used as the shot put of sports equipment.